1978 Cutlass

[Steven94]

New to the forum! I have a 78 cutlass and I’m trying to figure out all the wiring if someone could help me out.

1st pic brown w/white strip no sure where it goes

2nd pic red coming from firewall spliced into 4? Is this original?

3rd pic tan from fire wall spiced not sure were red end goes. Tan went to distributor

Last pic brown from firewall spliced not sure were either end goes

 

[ELCAM]

1- Brake warning light, goes to the proportioning valve.

2- Factory splice in the number 2 circuit, fuseable link to starter, spliced to HVAC blower motor relay, alternator and the C100 bulkhead connector.

3 and 4 have been modified would need more information to figure out what someone has done.

 

[Steven94]

1- Brake warning light, goes to the proportioning valve.

2- Factory splice in the number 2 circuit, fuseable link to starter, spliced to HVAC blower motor relay, alternator and the C100 bulkhead connector.

3 and 4 have been modified would need more information to figure out what someone has done.

What info might help you help me?

 

[ELCAM]

Where the wires go would be helpful or pics of all of the wiring in question.

Picture 3 is likely the other number 2 circuit and it is supposed to be a fuseable link that goes straight to the C 100 bulkhead connector. Looks like someone spliced something else into it.

FYI - Factory splices look like pic number 2 crimped and soldered. So if you untape pic number 3 and it doesn't look like the splice in pic number 2 it is a modification.

 

[Steven94]

Where the wires go would be helpful or pics of all of the wiring in question.

Picture 3 is likely the other number 2 circuit and it is supposed to be a fuseable link that goes straight to the C 100 bulkhead connector. Looks like someone spliced something else into it.

FYI - Factory splices look like pic number 2 crimped and soldered. So if you untape pic number 3 and it doesn't look like the splice in pic number 2 it is a modification.

Not factory

 

[Steven94]

Original wire goes to the firewall

One end goes to the distributor (Tan original gauge wire) and the red end is cut off no connector.

 

[ELCAM]

Pic 3 also might be circuit 3 pink for HEI +12V.

 

[ELCAM]

Looking at the picture you just posted the number 3 from the original post does look like the HEI pink wire that has been painted.

Which of the boxes does it connect to on the S100 connector? Sorry crappy picture.

 

[Steven94]

Looking at the picture you just posted the number 3 from the original post does look like the HEI pink wire that has been painted.

Which of the boxes does it connect to on the S100 connector? Sorry crappy picture.
View attachment 236068

Is the s100 the box on the firewall?

 

[ELCAM]

Yes.