Headlights

[kacrow76]

Ok so i know that this has been gone over lots. but i am stuck the car is almost done but i have no head lights and no turn lights. hold on i will tell you where i am i fixed the combo switch i now have power through the switch wipers work park lights work. hazard lights work. i have no power at the turn switch so no turn lights. power at all the fuses. not sure what i expect just thought i would share my story and see if any one can help.

[SteveJ]

If you have not already done so, get a copy of the FSM. That is the BEST guide to troubleshooting your wiring. Go to the Body Electrical (BE) section. You can also read through my analysis of the 240Z turn signal circuit on my blog: Hazard Switch ? Brake Light ? Turn Signal Circuit Analysis | Fiddling With Z Cars. While there are some differences in connectors, most (if not all) of the wire colors will also match up to the 280Z.

No power at the turn signals: (Refer to page BE-12)
1. Hazard switch: The hazard switch interrupts the turn signal circuit. This disables the turn signals when the hazard lights are on. If the contacts are worn, dirty, bent, etc., the turn signal circuit is not re-established.
2. Flasher unit: The turn signal circuit goes through the flasher before going to the turn signal switch. There are two flasher units. One is for the turn signals, and the other is for the hazard lights.
3. Fuse: Verify you have 12VDC to ground on both sides of the fuse.
You can trace through the circuit for voltage following the factory drawings. Take notes of where you measured and what you took apart. If you can't figure it out, report in detail where you measured, how you measured, and the results.

Headlights: (Refer to page BE-11)
When the headlight switch is in the ON position, the red wire comes off of the switch and goes to the fuse box. There it splits into the fuses for each headlight. One is red, and the other is red/yellow. Again verify you have voltage on both sides of each fuse when the switch is on.
Coming off the headlights are a red/black and a red/white wire. Those go back to the high beam/low beam switch on the turn signal switch. There one of those will be connected to the black ground wire. With the turn signal switch removed from the car, make sure that either the red/black or red/white wire has continuity to the black wire. Move the switch and ensure the other wire has continuity with the black wire. Before re-installing the switch, make sure the black wire in the dash harness has continuity with the chassis. When re-installing the switch, make sure you have connected all of the wires securely.

[kacrow76]

I found it to be at the hazard switch. not sure why i cleaned it all up but the end of the switch where the turn signals get there power seams to be where the trouble is. is there a fix for this or do you just have to replace the switch?

[SteveJ]

Okay so you found the problem with the turn signals. Contact Dave Irwin, aka Zs-ondabrain. He can probably quote you about working on the hazard switch.

Did you locate the issue with the headlights?

[kacrow76]

I found it to be at the hazard switch. not sure why i cleaned it all up but the end of the switch where the turn signals get there power seams to be where the trouble is. is there a fix for this or do you just have to replace the switch?

[SteveJ]

The hazard switch won't affect the headlights. You might have had a loose connection that you corrected as you tracked down the turn signal issues.

[mjr45]

The issue I had with my T/S and hazard had to do with the dash wiring harness connectors (pass. tunnel side) which also goes to the head light/combo switch I believe. the connectors were all corroded and the wires in the connectors were loose and falling out. Just a thought, bear in mind I am very bad with electrical stuff but get great advice from the site.

[philbar73]

I had alot of problems with switchs and conectors. I used Deoxit 100 Hosa Caig DeoxIT D100, Deoxidizer Aerosol Spray, 2 oz D100S2 on the switches and conectors and everything works.