Headlight switch and dash lights

[aludden]

[QUOTE=Ron;28239]See if the red-orange wire at the AC Panel relay has 12v with lights on.

Ron, If I understood you correctly, you wanted me to remove the relay and see if I have 12V when the lights are on. The answer is yes, on the pin marked by the arrow (can't tell what color wire that has). When the lights are off, no power there.
DSCN6988s.jpg

While I was there, I got to remind myself what a big mess my relay panel is :-(
Someone was very creative with all the wiring!!! I'm going to have lots of questions for you guys! Here's a sampler:

Overview: DSCN6989.JPG

Left side - what the heck? DSCN6984.JPG

A black wire goes from here to the red terminal in the picture above: DSCN6985.JPG

And fuse box with two very melted connectors: DSCN6986.JPG
These have been bypassed with inline fuses.

Not pretty! I guess I have my work cut-out...

[Farrar]

Left side - what the heck?

Looks like somebody bypassed the resistor for the HVAC panel bulbs.

Farrar

[aludden]

Looks like somebody bypassed the resistor for the HVAC panel bulbs.

Farrar

Would that cause the ac panel to go off when the lights are on?

[Farrar]

Would that cause the ac panel to go off when the lights are on?

Yep. I used to have the same problem -- panel would go dark when I turned the headlight switch on.

Farrar

[aludden]

Yep. I used to have the same problem -- panel would go dark when I turned the headlight switch on.

Farrar

Well, I have a replacement red resistor I can put in. Any idea why they would have run that black wire to the socket? I want to remove it and put the resistor.

[Farrar]

Well, I have a replacement red resistor I can put in. Any idea why they would have run that black wire to the socket?

Not sure. Is the black wire a ground wire or does it go somewhere else?

The red socket should only have two wires: one green/white one and one red/brown one, if memory serves, and they both connect to the HVAC panel lights relay socket.

Farrar

[Ron]

Ron, If I understood you correctly, you wanted me to remove the relay and see if I have 12V when the lights are on. The answer is yes, on the pin marked by the arrow (can't tell what color wire that has). When the lights are off, no power there.

That tells us the R-O wire from the rheostat is correct and that the AC light problem is somewhere else as suspected...which Farrar pointed out. However, I think that the jumper would just make the lights be bright all the time the key was on if nothing else has been changed. But that doesn't seem to be the case eg the extra black wire. I'm not clear as to where you are saying each end of it is connected. It sounds like you need to get it all where you can see exactly what colors are going where...

The red socket should only have two wires: one green/white one and one red/brown one, if memory serves, and they both connect to the HVAC panel lights relay socket.

yes, and the (Light)Green-White also goes to fuse 11 (one of many branches).

=====

Do you have a clear schematic (there is a decent one in the resources)?

[Farrar]

Here ya go! This way it will be on the same page.



Farrar

[Ron]

IMHO- I think it would be better to use the full schematic. These have "unimportant" wires missing because of the "focus". For example, the LG/W wire going to the main feed is missing...easy to think a PO made a boo boo etc. and his evidently has several mods...

[Farrar]

True, I think that diagram assumes that one knows that the LG/W wire is switched power. I don't know why they left that out. I should have mentioned that -- sorry.

Farrar