Finally!!! Thank you, I've had my 86 Bird since 87, my headlights went tits up in 94, I made an attachment for my battery screw gun that fits the manual headlight knob. The lights fold down with power but wouldn't go up, everyone said I was nuts, I can't wait to tackle it!
I had been looking for a detailed source on this subject for a long time, and unfortunately, I couldn’t understand the technical drawings of the diagrams I found on the internet until I came across your video. I am very pleased that you explained it with such clarity that even someone with no knowledge of electricity can understand it. I have an issue with the electrical system of my 1985 Trans Am, and for some reason, the headlight switch button heats up and the brass metals inside melt and stick together. As a result, the headlights no longer go up; only the light pulps inside are on. Now I understand that a short circuit in the electrical system may have damaged both the relay and the fuses. What steps would you recommend I take to diagnose this?
The wires come out of the firewall right under the brake booster, follow them closely all the way to the headlights themselves making sure they are not rubbed through and shorted either to ground or one another. If they look good, unplug the headlights and see if the switch still gets warm. If it does, the only thing left is a problem under the dash
I need to revisit the headlight issue on my 86 Trans Am. I don't even have these relays you are showing. The only relays at the front right of mine are the primary coolant fan and the auxiliary fan relays, and on the left front fender is the fog light relay. Mine has a headlight door module on the firewall that, according to the factory service manual, is what controls the headlight doors. I'm wondering if someone had already put in these relays to bypass the factory module on the car you worked on? Either way, I need to take a deeper dive into my issue again soon and see if I can find any traces of what you show.
im having an issue on my 90 t/a, the battery gauge voltage slightly bobs with turn signals car stays above 14 but sometimes dip after a while of driving
Don't worry about the gauge bobbing with turn signals, it's normal. Put a volt meter on the battery while the car is idling (after it drops a bit), if it's still 13.6 or better, your good.
Now that I think about it, a fuse was blown on this job (when I first started) and the dash lights were out. After fixing the headlights I replaced the fuse and all was well. Check your wiring close
