I purchased my 260z (build date 8/1974) with the headlight upgrade with separate relays for high, low, fog, and wash. I have working brake lights, hazard, and turn signals.
I tested the wiring at the combo switch by testing the white/red wire with a test light and it has voltage (so wiring from fusible link is ok).
With the headlight switch turned on I tested the solid red wire with the test light and it has voltage so that means my switch is good.
The headlight power is coming off the positive starter bolt.
Would I now test to see if the relays are bad?
Howard
1974 260z