[StarFire_MK2]

The most recent problem on my 87 Sundance involves the tail lights.

With the running lights off, the rear brake and turn lamps work normally.

With the running lights and/or headlights on, I have the following problems:

• The tail lamps all light up, except when I apply the brakes, in which case the right brake lamp goes out. The high brake light functions normally.
• Turn signals remain solid (no flashing)

The back-up lamps and front running lights/turn lights are unaffected, though one of the backup lights is much brighter than the other, despite both having identical new bulbs installed.

Any thoughts on how to trouble-shoot this electrical gremlin? The fuses are all intact, and the bulbs are all the correct type.

 

[StarFire_MK2]

Hmm, grounds eh? I cleaned all the grounds under the hood a few months ago. Is there a main ground strap for the tail lights? If so, where is it likely to be?

 

[StarFire_MK2]

IC: I did as you suggested, and my lights are indeed working properly and have returned to their previous brightness. Thanks for your help!

 

[StarFire_MK2]

Ok, now my high brake lights are not turning on. I have replaced the bulbs and checked the wiring at the connectors and all seems well. All the fuses look good too. What is the next thing I shoulf check? All other lights are functioning correctly.