1989 Chevy Caprice electrical issue

Did you use a voltage tester at the applicable fuses? Even if the fuse is good, if there is no voltage, the circuit is dead.

Check the circuits at the headlamp switch. The voltage just for the headlamps, comes from fusible link, there is a circuit breaker in the switch assembly for headlamps. Other lamps that are controled by the headlamp switch are fuse protected. Note info below.

Headlight switch was replaced (which might be bad - aftermarketstuff - not AC Delco)), but continuing on it still has loss of dash, dome, and tailights too? Any ideas? Thanks - RAY. PS: there is a module / relay for the dash/headlights somewhere behing dash - location unknown@

No reply came through from last question! I stated that switch was replaced(aftermarket-not AC Delco) but no luck and still no other lihts (IE: dash, dome interior, and taillights - only bacjuk lights work! Any ideas? Thanks - RAY

Still waiting on somemore input )another answer to my problem question?

So your headlamps are working ok? Did you check for voltage at tail-lamps fuse? You may need to check all your fusible links.

Somewhere I dropped the ball! - My bad! I forgot to list that all lights: headlights, taillights, dash, dome, parking are "Not Working"! The only lights that are working are the back-up lights!
I hope that clarifies my explanation clearly this time around - as I think originally I did also list the headlights as not-working, but due to answering replies a few times I somehow missed listing those headlights - TOO! Sorry Regards - RAY

Headlights are also "Not Working" - which I missed listing - since I had to answer replies so many times to explain the situation! Thank You - RAY! Still at this time I do not have a direct solution on what to do to fix this problem! Thanks - RAY

I gave you an answer on march 18th, you waited till nov 25th to reply? I gave you a wiring diagram, did you check for voltage, anywhere?