Here's my latest electrical puzzle with this car ('78 Euro 5 spd): I noticed that the right tail light was out, and when I removed the reflector I found that the socket and bulb base were corroded. However, after I had removed the corrosion and inserted a new bulb (or the known good bulb from the left side), it wouldn't light. I figured that the problem may be corrosion behind the fixture (all other bulbs in the fixture worked just fine), but when I had the fixture replaced (in the body shop -- I was rear-ended shortly after discovering that the bulb was out), that socket still wouldn't light the bulb. Any suggestions? I've also noticed that both side marker lights on the right, and the left rear one, don't light either when the headlights are turned on. Might the side and tail light problems be related? Oddly, there's no mention of fuses for the tail lights in the owners manual. Why would both headlights and only one tail light work?
P.S. The damage from the rear-ender has been repaired -- looks great.
Possible problems in rough order of how likely they are:
- Faulty connection between bulb and socket, or between socket and wires.
- Faulty ground connection. Chase brown wires to body connection.
- Faulty connection between fuse and holders.
- Blown fuse or blown bulbs.
- Faulty connection at Bulb Monitoring Controller or faulty Controller (behind glove box on many models).