83' 245 firewall wire harness

[Marco Rolandi]

Hello,

the wire harness at the firewall in my car is destroyed and most likely
caused alternator problems. I am trying to identify all the wires coming
out of the connector on the firewall and so for I got 2/5.

red = alternator D+ connection
black = oil sending unit

I am missing
brown - sort of bigger wire
blue yellow
yellow

Can anybody help?

Thanks,
Marco.

-------------------------------------------------------------------------------
Marco Rolandi
PhD Candidate Department of Applied Physics

Dai Group
Department of Chemistry
Stanford University
Stanford, 94305
phone: (650) 725-9156

 

[James Sweet]

Hello,

the wire harness at the firewall in my car is destroyed and most likely
caused alternator problems. I am trying to identify all the wires coming
out of the connector on the firewall and so for I got 2/5.

red = alternator D+ connection
black = oil sending unit

I am missing
brown - sort of bigger wire
blue yellow
yellow

Can anybody help?

Thanks,
Marco.

Is it the car side or the engine side or both that's destroyed? If it's the
engine side then the whole harness is probably shot, it's much easier to
replace the whole thing.

 

[don hodgdon]

Gray Rectangular Connector, left firewall, behind intake manifold.

1. Black - Oil Pressure Sender
2. Yellow - Temp Gauge Sender
3. Red - Thin Alternator Wire
4. Gray - Block Temp Sender
5. Blue/Yellow - (Fat) Starter Motor
6. Green - Oil Pressure Sender
7. Blue - Control Pressure Regulator
8. Brown - Starter Motor

This is from my '81 Turbo. A normally asperated car will only have one oil
pressure sender wire, IIRC it's the green one.

Hope this helps,

 

[Marco Rolandi]

Thanks for the help,
I found out this is the color coding:

Black Oil pressure sender.
Yellow Temp Gauge
Red Alternator Wire (alt failure light and excitation current)
Blu Yellow Starter Motor
Brown(fat) Ignition coil

Since the rest of the wire harness looked pretty good.
I only rewired these five wires. The only tricky one is the temp gauge.
The other four can be run and the left and right side of the engine with minimal work.
It took me ~ 2hrs and now all the sensors work great and the car starts
much better. I am posting this to the whole group in case this can be
useful as future reference.

Marco.