Age and heat has not been kind to the wires from the loom off the body to the engine block. In fact they crumbled to powder pretty much today.
Can anyone explain the path of the wires to the coil and then the resistor and the one that goes to the rear of the distributor cap too.?

I draw I diagram of the loom plug and the colors of wire out of it as best i can read the faded color. I can see a few of them on the various wiring charts but some make more sense than other. (series 2, 1974)

Anyone cure to play guess the origin/function/destination?



block plug of loom of wires from car body to engine block.

 

If you take a minute and download publication S57 you will find all of your electrical wiring questions answered ...a must have.

 

Going by the S2 wiring diagram I have,I can see this. I may be totally wrong but here goes.

White/Blue goes from Starter solinoid to ballast resistor

Green goes from revolution counter to Tacho

Green/blue from water temp gauge to water temp sender

black/brown Seat belt warning

white/brown , oil pressure sender to oil pressure light/gauge

White/slate ,coil negitive to ignition switch

 

Alyn, the S57 is almost completely Useless for S2 owners. It's only an answer to S3 owners.
(';')

 

Yes, well its the loom block and what goes where that i am mainly trying re-patch. the engine side of the loom and the body side of the loom do not even have exact matching colors I now find, so additionally confusing.
Can I assume the electrical wires related to tachometer in the engine bay are redundant if you have a mechanical speedometre?

Of the Eight plugs off the loom I have patched as follow

1. white/slate/blue to '-' on ignition coil
2. white/brown to oil pressure
3. black/brown no destination (maybe for tachometer if electric?)
4. plain white directly to ballast resistor at one side

then second row on loom:

5. brown/black wire travels across front of engine to alternator
6. green/blue directly to water temp thermostat
7. white/blue directly to "-" on ignition coil
8. plain green no destination

9. non-loom plug green/red along with bundle by loom, travelled over engine front to alt. but is dead-end so have left out.

Some colors are different from original post as I found they were different further down the loom nearer the body.

off the ignition coil itself (two plugs off each terminal)

"-" terminal has white/slate/blue which goes to loom
and white/black which goes to back of distributor spade plug for c/b

"+" terminal white/blue goes to loom while
white/yellow wire goes to remaining terminal on ballast resistor

it's a bit like forensic crime scene reconstruction give how charred and aged the wires were, so should have mapped then out before removing.

any thoughts?

 

Got the car going again, for what its worth this is what I found-

Of the Eight plugs off the loom I have patched as follow

1. plain white to directly to ballast resistor spade 1
2. brown/black UNKNOWN
3. white/brown to oil pressure unit
4. white/slate/blue tachometer to ignition coil "-" 1#

5. black/brown travels across front of engine to alternator for error light relay
6. green/blue directly to water temp thermostat
7. white/blue directly to "+" 1# on ignition coil
8. plain green UNKNOWN

ballast resistor has two spades, 1 wire to loom (see 1. above) and other wire white/yellow goes to directly to "+" 2# on ignition coil

a white/black wire travels from ignition coil "-" 2# to the spade at the back of the distributor for the contact breaker

on the loom plug items 2. (brown/black) and 8. (green) don't seem to effect function and cannot figure what they do otherwise. the additional green/red wire attached along side the loom plug originally went across engine front to the alternator maybe for A/C on some cars?

 

Aden,
On my car, the light green wire controls the AC compressor. it enters the cabin through the firewall/bulkhead near the tunnel in the passenger foot well (Left hand drive) but up high.

From there it goes behind the "cheek" to components next to the function switch.
(';')

 

I wonder if the Haynes books might help. The schematics there are hard to read, but seem for earlier cars than the S3's.


Electrickery certainly not my cup of tea.


Inside chores almost done. Gonna be "warm" today. Outside work beckons.


Half of front "pasture" mowed. If I had a rake and baler.....


Remaining "half" to go later. Then either whack the edges or attack
the remnants of the fallen limb. En situ or hook the Jeep to it and drag it to the driveway for sawing into disposable chunks. Firewood?
Probably not, I'd have to split the logs. And the Smoke ****'s are at work!!! BAAQD. They encourage neighbors to "rat" on each other.
I trust most, but some are leaving and others coming in....


New Mexico looks better and better.
Carl

 

More figured after line continuity test of oil light on dash back to the loom block in question, those last two plugs on the loom that I could not previously identify are GREEN and a BLACK/BROWN which terminate either side of the OIL light bulb so that is I assume to mean they are the (+) and (-) for the bulb. I assume the Oil Sender must have two terminals on it.

 

last note, BLACK/BROWN is the low oil sender light and the Green (has voltage) remains unidentified.