Cerbera electrical connector pinouts (front harness)

This page lists the pin assignments for the TVR Cerbera front harness connectors, as defined in Revision 3 of the factory electrical schedule. Revision 3 reflects the change from the AMP Duomate range to the ITT Cannon Trident range of wire-to-wire connectors, along with minor rearrangements to power distribution and ECU interfaces.

Use this as a reference when diagnosing faults, repinning a connector, or chasing a wire through the loom. Wire sizes are given in mm² (cross-sectional area). Pin numbers in the Destination column refer to the multiway connectors or other connectors elsewhere in the harness.

⚠️ Electrical work on a Cerbera affects safety-critical systems (brake lights, fans, fuel pump, ignition). Always disconnect the battery before unpinning a connector, verify continuity against the car in front of you, and never assume that an individual loom matches the schedule exactly — cars were hand-built and revisions overlap.

Connector index

Ref	Connector	Type
J1	Bonnet switch	2-way Trident snap-together
J2:A / J2:B	Brake light switch	6.3 mm spades + covers
J3	Cigarette lighter	3-way Trident
J4	Column pod harness	12-way Trident
J5	Courtesy lamp sub-harness	3-way Trident
J6	Dash switches interface unit	MIC IV 9-way
J7	Dashboard instrument pod	24-way Trident
J8	Driver’s door (main)	12-way Trident
J9	Driver’s door (speaker)	3-way Trident
J10	Engine harness	19-way Grote & Hartmann (4 power / 15 signal)
J11:A / J11:B	Handbrake switch	6.3 mm spades + covers
J12	Heater box (heated air)	6-way Trident
J13	Heater box (fresh air & A/C)	6-way Trident
J14	Heater control unit (1)	MIC IV 17-way
J15	Heater control unit (2)	MIC IV 17-way
J16	Ignition switch	2-way Trident
J17	Inner lock button + door LED	6-way Trident
J18	Passenger door (main)	12-way Trident
J19	Passenger door (speaker)	3-way Trident
J20	Low brake fluid switch	Framatome servo terminals
J21	Nose connector	19-way Grote & Hartmann
J22	Radio (brown ISO, speakers)	Pioneer 8-way ISO
J23	Radio (black ISO, power)	Pioneer 8-way ISO
J24	Reverse light switch	2-way sealed
J25	Steering wheel control unit	MIC IV 17-way (partial)

J1 — Bonnet switch (2-way Trident)

Pin	Function	Colour	Size (mm²)	Destination
1	Earth	Black	0.5	Earth point
2	Bonnet signal	Blue/black	0.5	Multiway 1, pin 21

J2 — Brake light switch (2 × 6.3 mm spades)

Function	Colour	Size (mm²)	Destination
Ignition feed	Green	0.5	Spliced joint 3
Brakes signal	Green/purple	0.5	Multiway 2, pin 10

J3 — Cigarette lighter (3-way Trident)

Pin	Function	Colour	Size	Destination
1	Battery	Red	1.0	Spliced joint 7
2	Earth	Black	0.5	Earth point
3	Illumination	Red/white	0.5	Spliced joint 9B

J4 — Column pod harness (12-way Trident)

Pin	Function	Colour	Size	Destination
1	Start signal	Black/white	0.5	Multiway 1, pin 18
2	Stop signal	Black/red	0.5	Multiway 1, pin 19
3	Fuel signal	Green/black	0.5	Multiway 1, pin 20
4	Ignition	Green	0.5	Spliced joint 1
5	Battery	Red	0.5	Spliced joint 7
6	Earth	Black	0.5	Earth point
7	Illumination	Red/white	0.5	Spliced joint 9A

J5 — Courtesy lamp sub-harness (3-way Trident)

Pin	Function	Colour	Size	Destination
1	Battery	Red	0.5	Spliced joint 7
2	Earth	Black	0.5	Earth point
3	Lamp control	Purple/red	0.5	Multiway 2, pin 11

J6 — Dash switches interface unit (MIC IV 9-way)

Pin	Function	Colour	Size	Destination
A1	Illumination	Red/white	0.5	Spliced joint 9A
A2	Earth	Black	0.5	Earth point
A5	Fog lamp signal	Yellow	0.5	Multiway 1, pin 15
B1	Headlamps	Blue	0.5	Spliced joint 12
B2	Sidelamp signal	White	0.5	Multiway 1, pin 16
B5	Fog lamp warning	Yellow/red	0.5	Multiway 1, pin 23

J7 — Dashboard instrument pod (24-way Trident)

Pin	Function	Colour	Size	Destination
1	Ignition	Green	0.5	Spliced joint 1
2	Speedo signal	Grey	0.5	Multiway 1, pin 26
3	Main beam w/l	Blue/white	0.5	Multiway 1, pin 25
4	Oil pressure w/l	Brown/white	0.5	Engine harness conn., pin 4
5	Indicate left	Green/red	0.5	Spliced joint 11
6	Illumination	Red/white	0.5	Spliced joint 9A
7	Indicate right	Green/white	0.5	Spliced joint 10
8	Tacho input	White/black	0.5	Engine harness, pin 14
9	EFI lamp	Light green/black	0.5	Engine harness conn., pin 12
10	Handbrake	Black/yellow	0.5	Handbrake switch
11	Alternator	Brown/yellow	0.5	Engine harness conn., pin 5
12	Earth	Black	0.5	Earth point
13	Shift lamp	Orange	0.5	Engine harness conn., pin 11
14	Brake fluid	Black/white	0.5	Brake fluid switch
15	ICE 1	White/pink	0.5	Heater ECU conn 2, B7
16	Inertia switch	Black/green	0.5	Multiway 1, pin 24
17	ICE 2	White/green	0.5	Heater ECU conn 2, B8
18	Driver’s seatbelt	Grey/black	0.5	Multiway 2, pin 3

J8 — Driver’s door, connector 1 (12-way Trident)

Pin	Function	Colour	Size	Destination
1	Earth	Black	0.5	Earth point
2	Door pin switch	White/purple	0.5	Multiway 1, pin 1
3	Inner release	Orange/white	0.5	Multiway 1, pin 2
4	Outer release	Orange	0.5	Multiway 1, pin 3
5	Window drive 1	Yellow/black	1.5	Multiway 1, pin 4
6	Window drive 2	Yellow/green	1.5	Multiway 1, pin 5
7	Mirror heater	Blue/orange	0.5	Spliced joint 14
8	Mirror common	Black/red	0.5	Passenger door conn 2, pin 8
9	Mirror 1	Light green	0.5	Passenger door conn 2, pin 9
10	Mirror 2	Slate	0.5	Passenger door conn 2, pin 10
11	Position signal	Blue/yellow	0.5	Multiway 1, pin 6
12	Ignition	Green	0.5	Spliced joint 1

J9 — Driver’s door, connector 2 (3-way Trident, speaker)

Pin	Function	Colour	Size	Destination
1	Illumination	Red/white	0.5	Spliced joint 9B
2	Speaker +	Slate	0.5	Radio connector (brown), pin 3
3	Speaker −	Slate/black	0.5	Radio connector (brown), pin 4

J10 — Engine harness connector (19-way Grote & Hartmann)

Pin	Function	Colour	Size	Destination
1	Fuel pump drive	Yellow	0.5	Multiway 2, pin 2
2	Radiator drive 2	Green/pink	0.5	Multiway 2, pin 16
3	Lambda heat	Yellow/black	0.5	Multiway 2, pin 17
4	Oil pressure	Brown/white	0.5	Dashboard connector, pin 4
5	Alternator w/l	Brown/yellow	0.5	Dashboard connector, pin 11
6	Battery (ECU)	Red	0.5	Spliced joint 8
7	Ignition — injectors	Green	1.0	Spliced joint 6
8	Starter solenoid	White/red	3.0	Multiway 3, pin 9
9	Ignition coil (odd)	Green	1.0	Spliced joint 4
10	Ignition coil (even)	Green	1.0	Spliced joint 4
11	Shift lamp	Orange	0.5	Dashboard connector, pin 13
12	EFI fault lamp	Light green/black	0.5	Dashboard connector, pin 9
13	Purge valve drive	Purple/black	0.5	Multiway 2, pin 19
14	Tacho	White/black	0.5	Dashboard, pin 8
15	Radiator drive 1	Green/pink	0.5	Spliced joint 13
16	Ignition ECU	Green	0.5	Spliced joint 6
17	A/C clutch	White/green	0.5	Heater control conn 2, B5
18	A/C acknowledge	White/black	0.5	Heater control conn 2, A6
19	A/C request	White/pink	0.5	Nose connector, pin 15

J11 — Handbrake switch (2 × 6.3 mm spades)

Function	Colour	Size	Destination
Earth	Black	0.5	Earth point
Handbrake switch	Black/yellow	0.5	Dashboard connector, pin 10

J12 — Heater box, heated air (6-way Trident)

Pin	Function	Colour	Size	Destination
1	Ignition	Green	2.0	Multiway 2, pin 4
2	Hot speed	Black/yellow	1.5	Heater control conn 1, A7
3	Left side-repeat	Green/red	0.5	Spliced joint 11
4	Earth	Black	0.5	Earth point

J13 — Heater box, fresh air & A/C (6-way Trident)

Pin	Function	Colour	Size	Destination
1	Ignition	Green	2.0	Multiway 2, pin 24
2	Cold speed	Black/white	1.5	Heater control conn 1, A3
3	Right side-repeat	Green/white	0.5	Spliced joint 10
4	Earth	Black	0.5	Earth point
5	A/C request out	White/pink	0.5	Nose harness conn., pin 12
6	A/C request in	White/pink	0.5	Heater control conn 2, B2

J14 — Heater control unit, connector 1 (MIC IV 17-way)

Pin	Function	Colour	Size	Destination
A3	Cold speed	Black/white	1.5	Heater box (fresh air), pin 2
A4	Earth	Black	2.0	Earth point
A7	Hot speed	Black/yellow	1.5	Heater box (heated air), pin 2
A8	Earth	Black	2.0	Earth point
A9	Earth	Black	0.5	Earth point
B2	Ignition	Green	0.5	Spliced joint 5
B3	Earth	Black	0.5	Earth point
B5	Ignition	Green	0.5	Spliced joint 5
B9	Ignition	Green	0.5	Spliced joint 5

J15 — Heater control unit, connector 2 (MIC IV 17-way)

Pin	Function	Colour	Size	Destination
A1	Rear window	Purple/red	0.5	Multiway
A3	Mirror heat	Blue/orange	0.5	Spliced joint 14
A4	Ignition	Green	0.5	Spliced joint 5
A6	A/C acknowledge	White/black	0.5	Engine connector, pin 18
A9	Thermistor −	Black/slate	0.5	Nose connector, pin 16
B1	Ignition	Green	0.5	Spliced joint 5
B2	A/C request	White/pink	0.5	Heater box (fresh air), pin 6
B5	A/C clutch	White/green	0.5	Engine connector, pin 17
B7	ICE LED 1	White/pink	0.5	Dashboard connector, pin 15
B8	ICE LED 2	White/green	0.5	Dashboard connector, pin 17
B9	Thermistor +	Black/red	0.5	Nose connector, pin 14

J16 — Ignition switch (2-way Trident)

Pin	Function	Colour	Size	Destination
1	Earth	Black	0.5	Earth point
2	Ignition control	Black	0.5	Multiway 2, pin 15

J17 — Inner lock button + door status LED (6-way Trident)

Pin	Function	Colour	Size	Destination
1	Earth	Black	0.5	Earth point
2	Lock signal	Black/white	0.5	Multiway 1, pin 13
3	Battery	Red	0.5	Spliced joint 7
4	LED drive	Black/red	0.5	Multiway 1, pin 14

J18 — Passenger door, connector 1 (12-way Trident)

Pin	Function	Colour	Size	Destination
1	Earth	Black	0.5	Earth point
2	Door pin switch	White/purple	0.5	Multiway 1, pin 7
3	Inner release	Orange/white	0.5	Multiway 1, pin 8
4	Outer release	Orange	0.5	Multiway 1, pin 9
5	Window drive 1	Red/black	1.5	Multiway 1, pin 10
6	Window drive 2	Red/green	1.5	Multiway 1, pin 11
7	Mirror heater	Blue/orange	0.5	Spliced joint 14
8	Mirror common	Black/red	0.5	Driver’s door conn 2, pin 8
9	Mirror 1	Light green	0.5	Driver’s door conn 2, pin 9
10	Mirror 2	Slate	0.5	Driver’s door conn 2, pin 10
11	Position signal	Blue/red	0.5	Multiway 1, pin 12
12	Ignition	Green	0.5	Spliced joint 1

J19 — Passenger door, connector 2 (3-way Trident, speaker)

Pin	Function	Colour	Size	Destination
1	Illumination	Red/white	0.5	Spliced joint 9B
2	Speaker +	Green	0.5	Radio connector (brown), pin 5
3	Speaker −	Green/black	0.5	Radio connector (brown), pin 6

J20 — Low brake fluid switch (Framatome servo terminals)

Function	Colour	Size	Destination
Earth	Black	0.5	Earth point
Low fluid signal	Black/white	0.5	Dashboard connector, pin 14

J21 — Nose connector (19-way Grote & Hartmann)

Pin	Function	Colour	Size	Destination
1	Horns	Purple/white	1.0	Multiway 3, pin 2
2	Washers	Blue/yellow	0.5	Wiper control unit, A9
4	Sidelamps r/h	Red/white	0.5	Multiway 3, pin 4
6	Sidelamps l/h	Red/white	0.5	Multiway 3, pin 6
7	Engine fan 1	Pink	3.0	Multiway 3, pin 7
8	Main beam r/h	Blue/white	1.5	Multiway 3, pin 1
9	Main beam l/h	Blue/white	1.5	Multiway 3, pin 3
10	Engine fan 2	Pink	3.0	Multiway 3, pin 10
11	Indicator r/h	Green/white	0.5	Spliced joint 10
12	A/C request in	White/pink	0.5	Heater box (cold), pin 6
13	Indicator l/h	Green/red	0.5	Spliced joint 11
14	Thermistor +	Black/red	0.5	Heater control conn 2, B9
15	A/C request out	White/pink	0.5	Engine connector, pin 19
16	Thermistor −	Black/slate	0.5	Heater control conn 2, A9
17	Dip beam r/h	Blue/red	1.0	Multiway 3, pin 17
18	A/C fan control	Green/pink	0.5	Spliced joint 13
19	Dip beam l/h	Blue/red	1.0	Multiway 3, pin 19

Pins 3 and 5 are not listed as populated in the schedule.

J22 — Radio brown ISO block (speakers)

Pin	Function	Colour	Size	Destination
1	RR speaker +	Slate/red	0.5	Multiway 2, pin 7
2	RR speaker −	Black/slate	0.5	Multiway 2, pin 8
3	FR speaker +	Slate	0.5	Driver’s door conn 2, pin 2
4	FR speaker −	Slate/black	0.5	Driver’s door conn 2, pin 3
5	FL speaker +	Green	0.5	Passenger door conn 2, pin 2
6	FL speaker −	Green/black	0.5	Passenger door conn 2, pin 3
7	RL speaker +	Green/red	0.5	Multiway 2, pin 5
8	RL speaker −	Black/green	0.5	Multiway 2, pin 6

J23 — Radio black ISO block (power)

Pin	Function	Colour	Size	Destination
4	Battery	Red	0.5	Spliced joint 7
5	Antenna power	Unused	—	—
6	Illumination	Red/white	0.5	Spliced joint 9B
7	Ignition	Green	0.5	Spliced joint 1
8	Earth	Black	0.5	Earth point

J24 — Reverse light switch (2-way sealed)

Pin	Function	Colour	Size	Destination
A	Ignition	Green	0.5	Spliced joint 3
B	Reverse signal	Light green/brown	0.5	Multiway

J25 — Steering wheel control unit (MIC IV 17-way, partial)

The source data for this connector is incomplete; the entries below are those that were clearly legible.

Pin	Function	Colour	Size	Destination
A2	Headlamp input	Blue	0.5	Spliced joint 12
A6	Wiper 2 signal	Red/green	0.5	Wiper control unit, B1
A7	Main beam signal	Blue/white	0.5	Multiway 1, pin 28
A8	Dip beam signal	Blue/red	0.5	Multiway 1, pin 27
A9	Turn left signal	Green/red	0.5	Multiway 1, pin 29
B1	Ignition	Green	0.5	Spliced joint 2
B2	Horn	Purple/black	0.5	Multiway 1, pin 32
B3	Hazard signal	Brown/black	0.5	Multiway 1, pin 31
B4	Battery	Red	0.5	Spliced joint 8
B5	Earth	Black	0.5	Earth point

Notes on the wiring scheme

• Spliced joints (e.g. spliced joint 1, spliced joint 7) are common feed points in the loom where several wires share a supply such as ignition-switched green, permanent battery red, or panel illumination red/white. They are not connectors as such.
• Multiway 1, 2 and 3 refer to the large body-to-dash interconnects; pin numbers in the Destination column are positions in those multiways.
• Connector families used: ITT Cannon Trident snap-together connectors replaced the earlier AMP Duomate parts at Revision 3. Other types referenced here are AMP/Framatome MIC IV multipin housings, Grote & Hartmann 19-way connectors for the engine and nose feeds, Pioneer ISO blocks for the head unit, and 6.3 mm Lucar-style spade terminals for switches.
• Wire size (mm²) is the conductor cross-section; the heaviest wires in the front loom shown here are the 3.0 mm² starter solenoid and engine fan feeds.

Compiled from a TVR Cerbera workshop/wiring schedule (Revision 3) community upload — always verify against the original document and against the actual loom in your car before cutting, repinning or probing wires.