Gregory Bender

Wiring harnesses for the Moto Guzzi V85 TT: 2024 and later models

To order, e-mail: greg@thisoldtractor.com

2024 and later models are characterized by having the 3-pin connector located beneath the cover between the headlight and dash panel. CHECK WHICH ONE YOU HAVE BEFORE ORDERING

Custom Sub-Harnesses for 2024 and later models

Part Number Description Photo Price
V85TT-AUX-LIGHTS-SUPERSEAL

Plug-in-ready, relay-equipped harness for adding auxiliary lights to the Moto Guzzi V85 TT

APPLICABLE TO 2024 AND LATER MODELS WITH THE 3-PIN CONNECTOR LOCATED BENEATH THE COVER BETWEEN THE HEADLIGHT AND DASH PANEL - CHECK WHICH ONE YOU HAVE BEFORE ORDERING

Easily add aftermarket lights to the V85 TT. Plugs directly into the existing OEM Moto Guzzi wiring harness. Operates with the OEM handlebar switch. Extra long wire leads to support various routing and light placement options (1000 mm). Sealed relay. Includes terminals to make connections to auxiliary spot lights, LED lights, etc.

Note: Power to the spot lights flows through the existing Moto Guzzi wiring harness - just like Moto Guzzi did with the OEM auxillary lights.

Connection to the OEM Moto Guzzi wiring harness.
Connection to the OEM Moto Guzzi wiring harness.
Connection to the OEM Moto Guzzi wiring harness.

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Installation instructions

  1. Remove the cover that fits between the headlight and the dash.
  2. Identify the 3-pin connector that is not currently connected to a mating 3-pin connector. It may be zip-tied and tucked away.
  3. Connect the 3-pin plug on the new harness to the OEM Moto Guzzi 3-pin connector.
  4. Route the two pairs of red and black wire extensions; one pair will go to each light.
  5. Fit the relay and associated wiring under the cover and replace the cover.
  6. Make the wire connections at each light with the provided bullet terminals.
    • Black to ground/earth.
    • Red to power.
    • Feel free to cut the sheathing and wiring to the length needed.
Connection under the cover between the headlight and the dash.
Connection under the cover between the headlight and the dash.
Connection under the cover between the headlight and the dash.

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Plug-in-ready, relay-equipped harness for adding auxiliary lights for non-OEM LED lights on the Moto Guzzi V85 TT.
Plug-in-ready, relay-equipped harness for adding auxiliary lights for non-OEM LED lights on the Moto Guzzi V85 TT.
Plug-in-ready, relay-equipped harness for adding auxiliary lights for non-OEM LED lights on the Moto Guzzi V85 TT.

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USD $41.00

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V85TT-AUX-LIGHTS-BAT-SUPERSEAL

Plug-in-ready, relay-equipped harness for adding auxiliary lights to the Moto Guzzi V85 TT

APPLICABLE TO 2024 AND LATER MODELS WITH THE 3-PIN CONNECTOR LOCATED BENEATH THE COVER BETWEEN THE HEADLIGHT AND DASH PANEL - CHECK WHICH ONE YOU HAVE BEFORE ORDERING

This version runs power directly from the battery, light operation still controlled by the Guzzi handlebar switch. Easily add aftermarket lights to the V85 TT. Plugs directly into the existing OEM Moto Guzzi wiring harness. Operates with the OEM handlebar switch. Extra long wire leads to support various routing and light placement options (1000 mm). Sealed relay. Includes terminals to make connections to auxiliary spot lights, LED lights, etc.

Note: Power to the spot lights flows direcly from the battery. Only the handlebar switch signal wire passes through the existing Moto Guzzi wiring harness. This is preferred if you are planning to operate high amperage auxilarly lights.

Connection to the OEM Moto Guzzi wiring harness.
Connection to the OEM Moto Guzzi wiring harness.
Connection to the OEM Moto Guzzi wiring harness.

Direct link to image

Relay.
Relay.
Relay.

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Fuse and connections to the battery positive and negative terminals.
Fuse and connections to the battery positive and negative terminals.
Fuse and connections to the battery positive and negative terminals.

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Installation instructions

  1. Remove the cover that fits between the headlight and the dash.
  2. Identify the 3-pin connector that is not currently connected to a mating 3-pin connector. It may be zip-tied and tucked away.
  3. Connect the 3-pin plug on the new harness to the OEM Moto Guzzi 3-pin connector.
  4. Route the two pairs of red and black wire extensions; one pair will go to each light.
  5. Route the wire bundle with the inline fuse back to the battery.
  6. Fit the relay and associated wiring under the cover and replace the cover.
  7. Make the wire connections at each light with the provided bullet terminals.
    • Black to ground/earth.
    • Red to power.
    • Feel free to cut the sheathing and wiring to the length needed.
  8. Make the wire connections at the battery.
    • Black to ground/earth.
    • Red to power.
Connection under the cover between the headlight and the dash.
Connection under the cover between the headlight and the dash.
Connection under the cover between the headlight and the dash.

Direct link to image

Plug-in-ready, relay-equipped harness for adding auxiliary lights for non-OEM LED lights on the Moto Guzzi V85 TT.
Plug-in-ready, relay-equipped harness for adding auxiliary lights for non-OEM LED lights on the Moto Guzzi V85 TT.
Plug-in-ready, relay-equipped harness for adding auxiliary lights for non-OEM LED lights on the Moto Guzzi V85 TT.

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USD $56.00

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Components

Part Number Description Photo Price
MG# 12702900

Rubber boot/cover for small wire terminals.

Intended to cover smaller wires with ring terminals. Sold each.

Rubber boot/cover shown in use with a 12 AWG wire and a 6 mm ring terminal. (MG# 12702900).
Rubber boot/cover shown in use with a 12 AWG wire and a 6 mm ring terminal. (MG# 12702900).
Rubber boot/cover shown in use with a 12 AWG wire and a 6 mm ring terminal. (MG# 12702900).

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Rubber boot/cover shown in use with a 12 AWG wire and a 6 mm ring terminal. (MG# 12702900).
Rubber boot/cover shown in use with a 12 AWG wire and a 6 mm ring terminal. (MG# 12702900).
Rubber boot/cover shown in use with a 12 AWG wire and a 6 mm ring terminal. (MG# 12702900).

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Rubber boot/cover shown in use with a 12 AWG wire and a 6 mm ring terminal. (MG# 12702900).
Rubber boot/cover shown in use with a 12 AWG wire and a 6 mm ring terminal. (MG# 12702900).
Rubber boot/cover shown in use with a 12 AWG wire and a 6 mm ring terminal. (MG# 12702900).

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Rubber boot/cover for small wire terminals (MG# 12702900).
12702900: Rubber boot/cover for small wire terminals (MG# 12702900).
12702900: Rubber boot/cover for small wire terminals (MG# 12702900).

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USD $2.50

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MG# 12703000

Rubber boot/cover for battery cables.

Intended to cover the terminal located at the starter solenoid. Not suitable for fitment at battery terminals. Sold each.

Rubber boot/cover shown in use with a 6 AWG battery cable (MG# 12703000).
Rubber boot/cover shown in use with a 6 AWG battery cable (MG# 12703000).
Rubber boot/cover shown in use with a 6 AWG battery cable (MG# 12703000).

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Rubber boot/cover shown in use with a 6 AWG battery cable (MG# 12703000).
Rubber boot/cover shown in use with a 6 AWG battery cable (MG# 12703000).
Rubber boot/cover shown in use with a 6 AWG battery cable (MG# 12703000).

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Rubber boot/cover for battery cables (MG# 12703000).
12703000: Rubber boot/cover for battery cables (MG# 12703000).
12703000: Rubber boot/cover for battery cables (MG# 12703000).

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USD $2.50

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MG# 90706765

O-ring to seal the large, 100 mm speedometer to the dash.

This O-ring seals the speedometer to the dash.

O-ring to seal the large, 100 mm speedometer to the single gauge civilian or police dash.
90706765: O-ring to seal the large, 100 mm speedometer to the single gauge civilian or police dash.
90706765: O-ring to seal the large, 100 mm speedometer to the single gauge civilian or police dash.

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USD $2.00

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MG# 90706746

Set of two O-rings to seal the smaller, 80 mm speedometer and tachometer to the dash.

These O-rings seal each gauge to the dash.

Set of two O-rings to seal the smaller, 80 mm speedometer and tachometer to the dual gauge civilian dash.
90706746: Set of two O-rings to seal the smaller, 80 mm speedometer and tachometer to the dual gauge civilian dash.
90706746: Set of two O-rings to seal the smaller, 80 mm speedometer and tachometer to the dual gauge civilian dash.

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USD $4.00

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MG# 93400964

4 connection female spade connector

A great way to connect four wires without the need for male spade terminals (Moto Guzzi typically did not use male spade terminals on wiring harnesses). Accepts 6.3 mm (14 inch) terminals. Sold each.

Best to use a needle-nosed pair of pliers to insert and remove terminals.

4 connection female spade connector.
93400964: 4 connection female spade connector.
93400964: 4 connection female spade connector.

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USD $8.00

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MG# 93400863 MG# 93400963

3 connection female spade connector

A great way to split power to two devices such as driving lights, front and rear turn signals, etc. (Faston or Mamut number 405). Accepts 6.3 mm (14 inch) terminals. Sold each.

Best to use a needle-nosed pair of pliers to insert and remove terminals.

3 connection female spade connector.
93400863: 3 connection female spade connector.
93400863: 3 connection female spade connector.

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USD $6.00

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MG# 93400962

2 connection female spade connector

A great way to connect two wires without the need for male spade terminals (Moto Guzzi typically did not use male spade terminals on wiring harnesses). These are used on the Tonti framed models (Faston or FasBlok) and could be used in custom applications on the loop frame models. Accepts 6.3 mm (14 inch) terminals. Sold each.

2 connection female spade connector.
93400962: 2 connection female spade connector.
93400962: 2 connection female spade connector.

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USD $3.00

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BULLET-CONNECTOR

2 connection bullet connector

A great way to connect two male bullet terminals (double bullet connector). Accepts 4 mm (0.157 inch) terminals. Sold each.

2 connection bullet connector.
2 connection bullet connector.
2 connection bullet connector.

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USD $0.50

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BULB-HOLDER-SINGLE

Single terminal bulb holder

A very nice single terminal bulb holder with excellent fitment within the tube that is secured to the dash. Includes color-coded short jumper wire with a 4 mm female bullet terminal to mate perfectly with the original wiring harness. Accepts standard sized OEM bulbs. ~12 mm OD. Sold each.

When ordering: Please specify wire color and terminal.

Accepts this style of bayonet bulb.
Accepts this style of bayonet bulb.

Photo courtesy of McMaster-Carr.

Accepts this style of bayonet bulb.
Accepts this style of bayonet bulb.

Photo courtesy of McMaster-Carr.

Single terminal bulb holder.
Single terminal bulb holder.
Single terminal bulb holder.

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USD $7.50

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BULB-HOLDER-DUAL

Dual terminal bulb holder

A great replacement dual terminal bulb holder and very close to the original in design. Accepts two 6.35 mm female spade terminals, just like the original. Excellent fitment within the tube that is secured to the dash. Accepts standard sized OEM bulbs. ~12 mm OD. Sold each.

Accepts this style of bayonet bulb.
Accepts this style of bayonet bulb.

Photo courtesy of McMaster-Carr.

Accepts this style of bayonet bulb.
Accepts this style of bayonet bulb.

Photo courtesy of McMaster-Carr.

Dual terminal bulb holder.
Dual terminal bulb holder.
Dual terminal bulb holder.

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USD $5.00

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MG# 17760650 MG# 14768650 MG# 10754905

Dual terminal bulb holder

A great replacement dual terminal bulb holder and very close to the original in design. Accepts two 6.35 mm female spade terminals, just like the original. Excellent fitment within the tube that is secured to the dash. Accepts standard sized OEM bulbs. ~12 mm OD. Sold each.

Accepts this style of wedge bulb.
Accepts this style of wedge bulb.

Photo courtesy of McMaster-Carr.

Dual terminal bulb holder.
17760650: Dual terminal bulb holder.
17760650: Dual terminal bulb holder.

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USD $5.00

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MG# 93450322 MG# 93450122

Light bulb for gauge and indicator lights

3.36 watt lamp, bayonet base, 500 hour average life, approximately 10 mm (0.41 inch) in diameter. Sold each.

Note: The MG# 93450322 bulbs are longer in overall length, but brighter than MG# 10744910. In general, I recommend MG# 93450322 because they are brighter and easier to see. If you know that your dash requires a shorter bulb, please order MG# 10744910.

This bulb may also be used as a city light or pilot light.

Light bulb for gauge and indicator lights.
93450322: Light bulb for gauge and indicator lights.
93450322: Light bulb for gauge and indicator lights.

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USD $0.75

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MG# 10744910

Light bulb for gauge and indicator lights

1.728 watt lamp, bayonet base, 1000 hour average life, approximately 10 mm (0.41 inch) in diameter. Sold each.

Note: The MG# 93450322 bulbs are longer in overall length, but brighter than MG# 10744910. In general, I recommend MG# 93450322 because they are brighter and easier to see. If you know that your dash requires a shorter bulb, please order MG# 10744910.

Light bulb for gauge and indicator lights.
10744910: Light bulb for gauge and indicator lights.
10744910: Light bulb for gauge and indicator lights.

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USD $0.75

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MG# 14744910

Light bulb for indicator lights

2 watt lamp, bayonet base, 1000 hour average life, approximately 7 mm (0.28 inch) in diameter. Sold each.

Light bulb for indicator lights.
14744910: Light bulb for indicator lights.
14744910: Light bulb for indicator lights.

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USD $1.50

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MG# 93450224

Light bulb for tail light

Long life bulb to help prevent failure due to vibration (1157LL), dual element, 26.88 / 8.26 watt lamp, bayonet base, 2400 / 10000 hour average life. Sold each.

Light bulb for tail light.
93450224: Light bulb for tail light.
93450224: Light bulb for tail light.

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USD $1.50

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MG# 93450129

Light bulb for turn signals and parking lights

Long life bulb to help prevent failure due to vibration (1156LL), single element, 26.88 watt lamp, bayonet base, 2400 hour average life. Sold each.

Light bulb for turn signals and parking lights.
93450129: Light bulb for turn signals and parking lights.
93450129: Light bulb for turn signals and parking lights.

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USD $1.50

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MG# 17762150

Light bulb for gauge and indicator lights

3.78 watt lamp, wedge base, 2500 hour average life, approximately 10 mm (0.41 inch) in diameter. Sold each.

Light bulb for gauge and indicator lights.
17762150: Light bulb for gauge and indicator lights.
17762150: Light bulb for gauge and indicator lights.

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USD $0.75

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MG# 93450140

Light bulb for indicator lights

1.40 watt lamp, wedge base, 500 hour average life, approximately 5 mm (0.23 inch) in diameter. Sold each.

Light bulb for indicator lights.
93450140: Light bulb for indicator lights.
93450140: Light bulb for indicator lights.

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USD $0.75

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MG# 12734900

Starter button bracket

Bracket to fit the original starter button (22 mm diameter mounting hole). Stainless steel. Very nice. Starter button sold separately. Sold each.

Starter button bracket.
12734900: Starter button bracket.
12734900: Starter button bracket.

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USD $15.50

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MG# 26735001

Starter button

Momentary push button switch to actuate the starter. Fits the original bracket perfectly (22 mm diameter mounting hole) and comes complete with set screw terminals just like the original. Sturdy metal housing and nice quality black plastic securing nut. Sold each.

Starter button.
26735001: Starter button.
26735001: Starter button.

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USD $20.00

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MG# 26735001-BLACK

Starter button

Momentary push button switch to actuate the starter. Fits the original bracket perfectly (22 mm diameter mounting hole) and comes complete with set screw terminals just like the original. Nice quality black plastic housing and securing nut. Sold each.

Starter button.
26735001: Starter button.
26735001: Starter button.

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USD $14.00

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MG# 17743000

Original fuse block

New production, very good quality fuse box. Accepts six fuses (MG# 17742550 or MG# 12742500). Comes with clear cover and two jumpers. Additional jumpers available. Sold each.

Fuse box
Fuse box
Fuse box

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Fuse box
Fuse box
Fuse box

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Fuse box
17743000: Fuse box
17743000: Fuse box

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USD $42.00

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MG# 17743000-JUMPER

Jumper for original fuse block

Jumper connection used to join multiple fuse circuits. Fits the original fuse box. Sold each.

Jumper for original fuse block
17743000: Jumper for original fuse block
17743000: Jumper for original fuse block

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USD $1.50

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MG# 12742500

25 amp fuse

Original style fuse to fit the original fuse block. Sold each.

25 amp fuse.
12742500: 25 amp fuse.
12742500: 25 amp fuse.

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USD $0.50

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MG# 17742550

16 amp fuse

Original style fuse to fit the original fuse block. Sold each.

16 amp fuse.
17742550: 16 amp fuse.
17742550: 16 amp fuse.

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USD $0.50

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MG# 28743060

Fuse holder

Single fuse holder that may be connected to other single fuse holders to form a row. Sold each. Fuses sold separately.

Fuse holder.
28743060: Fuse holder.
28743060: Fuse holder.

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USD $2.50

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MG# 28742560

15 amp ATO / ATC fuse

As used on many modern Guzzis accepting blade style fuses. Sold each.

15 amp ATO / ATC fuse.
28742560: 15 amp ATO / ATC fuse.
28742560: 15 amp ATO / ATC fuse.

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USD $0.25

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POST-TO-SPADE-ADAPTER

5 mm post to 6.3 mm male spade adapter

~5 mm diameter hole permits fitment to the neutral switch and dash grounding points (as original). One required per neutral switch. Dash usage varies by model. Sold each.

5 mm post to 6.3 mm male spade adapter.
5 mm post to 6.3 mm male spade adapter.
5 mm post to 6.3 mm male spade adapter.

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USD $0.50

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MG# 13741640-LED

Bracket for mounting LED turn signal flashers

Designed specifically for LED flashers that are rubber mounted. Mounting hole is 7 mm in diameter. Sold each.

Bracket for mounting LED turn signal flashers. Flasher not included.
Bracket for mounting LED turn signal flashers. Flasher not included.
Bracket for mounting LED turn signal flashers. Flasher not included.

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Bracket for mounting LED turn signal flashers.
13741640: Bracket for mounting LED turn signal flashers.
13741640: Bracket for mounting LED turn signal flashers.

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USD $3.00

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MG# 13741640

Bracket for mounting turn signal flashers

Fits standard sized round thermal and electronic flashers. Mounting hole is 6 mm in diameter. Sold each.

Bracket for mounting turn signal flashers.
13741640: Bracket for mounting turn signal flashers.
13741640: Bracket for mounting turn signal flashers.

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USD $3.00

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MG# 12745760

Push-pull switch

Good quality switch with screw-type terminals. 25 amp capacity. 8 mm × 1 mm threads. Knob unscrews for fitment. Sold each.

Push-pull switch.
12745760: Push-pull switch.
12745760: Push-pull switch.

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USD $5.00

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MG# 12734900ALT

Bracket for push-pull switch

This bracket is identical to the starter button bracket, except the hole is ~8 mm in diameter. The intent is to mount this bracket on the left clutch perch, mirroring the starter button bracket. Then, a push-pull switch may be fit to the bracket and used to conveniently actuate spot lights or other electrical components. Stainless steel. Very nice. Push-pull switch sold separately. Sold each.

Bracket for push pull switch.
12734900: Bracket for push pull switch.
12734900: Bracket for push pull switch.

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USD $15.50

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MG# 13745740 MG# 17745760 MG# 18745701

Toggle switch

Excellent quality SEALED switch with six quick connect terminals (as original). 15 amp capacity, on-on double pole double throw, comes complete with mounting hardware (as shown). Sold each.

Toggle switch.
13745740: Toggle switch.
13745740: Toggle switch.

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USD $18.50

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TOGGLE-BOOT

Half height toggle switch boot

Half-height boot for the toggle switch. Uses standard 1532-32 inch threads. Be sure to rotate the toggle with the boot when fitting the boot to the switch. Sold each.

Half height toggle switch boot.
Half height toggle switch boot.
Half height toggle switch boot.

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USD $4.50

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TOGGLE-BOOT-FULL

Full height toggle switch boot

Full-height boot for the toggle switch. Uses standard 1532-32 inch threads. Be sure to rotate the toggle with the boot when fitting the boot to the switch. Sold each.

Full height toggle switch boot.
Full height toggle switch boot.
Full height toggle switch boot.

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USD $4.00

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MG# 12732500

5 pin mini relay (SPDT) with mounting bracket.

40 amp rating.

Sealed construction. Resistor is used across the coil terminals for long life and reliable service. 40 amp maximum continuous current rating on the normally open circuit. 30 amp maximum continuous current rating on the normally closed circuit.

Great replacement for the starter relay or for use with custom functions. Mounting bracket has a 5.5 mm diameter hole. Sold each.

40 amp, 5 pin mini relay (SPDT) with mounting bracket.
12732500: 40 amp, 5 pin mini relay (SPDT) with mounting bracket.
12732500: 40 amp, 5 pin mini relay (SPDT) with mounting bracket.

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USD $5.00

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MG# 28732560

5 pin mini relay (SPDT) without mounting bracket.

40 amp rating.

Great replacement for the starter relay or for use with custom functions. Sold each.

40 amp, 5 pin mini relay (SPDT) without mounting bracket.
28732560: 40 amp, 5 pin mini relay (SPDT) without mounting bracket.
28732560: 40 amp, 5 pin mini relay (SPDT) without mounting bracket.

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USD $5.00

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MG# 30732510

5 pin mini relay (SPST) without mounting bracket.

Sealed construction. 40 amp maximum continuous current rating.

So far, the only Guzzi I know of that requires this relay is the 1000 S series 2 with the later Digiplex ignition module. As far as I know, all other applications should use MG# 28732560. Sold each.

40 amp, 5 pin mini relay (SPST) without mounting bracket.
30732510: 40 amp, 5 pin mini relay (SPST) without mounting bracket.
30732510: 40 amp, 5 pin mini relay (SPST) without mounting bracket.

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USD $7.50

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MG# 30732560

5 pin micro relay (SPDT) without mounting bracket.

30 amp rating.

Sealed construction. Resistor is used across the coil terminals for long life and reliable service. 30 amp maximum continuous current rating on the normally open circuit. 20 amp maximum continuous current rating on the normally closed circuit.

Used on many later Guzzis. Fits my custom relay solution. Great for use with custom functions. Sold each.

35 amp / 25 amp, 5 pin micro relay (SPDT) without mounting bracket.
30732560: 35 amp / 25 amp, 5 pin micro relay (SPDT) without mounting bracket.
30732560: 35 amp / 25 amp, 5 pin micro relay (SPDT) without mounting bracket.

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USD $5.00

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