Engine bay black box electrics
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Engine bay black box electrics
Hi, I have an early 1985 VW T25 1.9l water cooled. The black box that houses the electrics in the engine bay, does anyone have a wiring diagram or is there another thread that explains all? Mines a mess and I have no idea where to start. Thanks.
Early 1985 VW T25 1.9 Watercooled
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Re: Engine bay black box electrics
Early 1985 VW T25 1.9 Watercooled
- Mocki
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Re: Engine bay black box electrics
Is this any help?Lighting connector is as follows.
T7/1 = Black / White for left indicator
T7/2 = Black / Green for right indicator
T7/3 = Black / Red for both brake lights
T7/4 = Grey / White for the rear fog light
T7/5 = Grey / Black for left tail light
T7/6 = Grey / Red for right tail light
T7/7 = Brown for chassis / earth for both rear clusters.
Note that the reverse lights and rear number plate lights do not go from the seven pin plug.
These are separate wires as follows.
Reverse light wires are Blue / Black, to reverse switch and then to rear light cluster(s).
And rear number plate wires are Grey / Green.
The other 7 pin connector is as follows.
T7a/1 = Blue / Black 0.3 bar oil pressure switch
T7a/2 = Yellow / Red coolant gauge sender
T7a/3 = Blue / Green low coolant level switch
T7a/4 = Brown Sender unit common grounds
T7a/5 = Green rpm / tacho signal
T7a/6 = Red / Black terminal 50 supply
T7a/7 = Yellow 0.9 bar or 1.8 bar oil pressure switch.
(Dependent upon model, with dynamic oil pressure system - DOPS / buzzer of doom).
Compiled by Robsey
T7/1 = Black / White for left indicator
T7/2 = Black / Green for right indicator
T7/3 = Black / Red for both brake lights
T7/4 = Grey / White for the rear fog light
T7/5 = Grey / Black for left tail light
T7/6 = Grey / Red for right tail light
T7/7 = Brown for chassis / earth for both rear clusters.
Note that the reverse lights and rear number plate lights do not go from the seven pin plug.
These are separate wires as follows.
Reverse light wires are Blue / Black, to reverse switch and then to rear light cluster(s).
And rear number plate wires are Grey / Green.
The other 7 pin connector is as follows.
T7a/1 = Blue / Black 0.3 bar oil pressure switch
T7a/2 = Yellow / Red coolant gauge sender
T7a/3 = Blue / Green low coolant level switch
T7a/4 = Brown Sender unit common grounds
T7a/5 = Green rpm / tacho signal
T7a/6 = Red / Black terminal 50 supply
T7a/7 = Yellow 0.9 bar or 1.8 bar oil pressure switch.
(Dependent upon model, with dynamic oil pressure system - DOPS / buzzer of doom).
Compiled by Robsey
Steve
tel / txt O7947-137911
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1989 2.1LpgWBX HiTop Leisuredrive Camper
1988 2.1 Caravelle TS TinTop Camper
tel / txt O7947-137911
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1989 2.1LpgWBX HiTop Leisuredrive Camper
1988 2.1 Caravelle TS TinTop Camper
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Re: Engine bay black box electrics
Thank you!
Mocki wrote: ↑05 Apr 2021, 19:26 Is this any help?Lighting connector is as follows.
T7/1 = Black / White for left indicator
T7/2 = Black / Green for right indicator
T7/3 = Black / Red for both brake lights
T7/4 = Grey / White for the rear fog light
T7/5 = Grey / Black for left tail light
T7/6 = Grey / Red for right tail light
T7/7 = Brown for chassis / earth for both rear clusters.
Note that the reverse lights and rear number plate lights do not go from the seven pin plug.
These are separate wires as follows.
Reverse light wires are Blue / Black, to reverse switch and then to rear light cluster(s).
And rear number plate wires are Grey / Green.
The other 7 pin connector is as follows.
T7a/1 = Blue / Black 0.3 bar oil pressure switch
T7a/2 = Yellow / Red coolant gauge sender
T7a/3 = Blue / Green low coolant level switch
T7a/4 = Brown Sender unit common grounds
T7a/5 = Green rpm / tacho signal
T7a/6 = Red / Black terminal 50 supply
T7a/7 = Yellow 0.9 bar or 1.8 bar oil pressure switch.
(Dependent upon model, with dynamic oil pressure system - DOPS / buzzer of doom).
Compiled by Robsey
Early 1985 VW T25 1.9 Watercooled
- Robsey
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Re: Engine bay black box electrics
That top grey / green looks a bit dodgy.
Should be your number plate light feed.
And it looks like someone spliced the wires for both oil pressure sensors together with a scotch-lock.
Blue/black and yellow wires.
I can see why you want to check out what each wire is for.
Should be your number plate light feed.
And it looks like someone spliced the wires for both oil pressure sensors together with a scotch-lock.
Blue/black and yellow wires.
I can see why you want to check out what each wire is for.
1983 Tin Top with a poorly DF and 4 speed DT box.
1987 Electrics and a DJ engine.
Maybe one day I might get it finished
1987 Electrics and a DJ engine.
Maybe one day I might get it finished
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Re: Engine bay black box electrics
Cheers! Will look at it all. I’m just no electrician, so hopefully not too hard.Robsey wrote:That top grey / green looks a bit dodgy.
Should be your number plate light feed.
And it looks like someone spliced the wires for both oil pressure sensors together with a scotch-lock.
Blue/black and yellow wires.
I can see why you want to check out what each wire is for.
And the oil pressure cables may explain why my sensor light doesn’t work in the dash!
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Early 1985 VW T25 1.9 Watercooled
- Robsey
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Re: Engine bay black box electrics
A small correction...
The reverse light wire is black / blue...
Not blue/black....
Blue/black is the oil pressure wire.
Apologies if it caused any confusion.
The reverse light wire is black / blue...
Not blue/black....
Blue/black is the oil pressure wire.
Apologies if it caused any confusion.
1983 Tin Top with a poorly DF and 4 speed DT box.
1987 Electrics and a DJ engine.
Maybe one day I might get it finished
1987 Electrics and a DJ engine.
Maybe one day I might get it finished
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- Registered user
- Posts: 58
- Joined: 02 Sep 2020, 22:11
- 80-90 Mem No: 17264
- Location: Bristol
Re: Engine bay black box electrics
So the red wire seems to go in the place of the black/white. Does that make sense?
Early 1985 VW T25 1.9 Watercooled
- Robsey
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Re: Engine bay black box electrics
It doesn't make much sense to me...
Unless the original black/white wire was faulty or not working properly.
That is for the indicator bulb on the left side.
Unless the original black/white wire was faulty or not working properly.
That is for the indicator bulb on the left side.
1983 Tin Top with a poorly DF and 4 speed DT box.
1987 Electrics and a DJ engine.
Maybe one day I might get it finished
1987 Electrics and a DJ engine.
Maybe one day I might get it finished