Join Date: Jun 2001
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Re: brake lights
The chances are pretty slim that a bad ground would blow a fuse on a lighting circuit (could happen on an inductive load, such as an electric motor), but anything's possible.
Don't over look the fact that you may in fact have two or more problems. (ie: bad ground AND soemthing else)
Do the turn signals work? If they do, but the break lights don't, it's either the brake light switch or the turn signal switch (or possibly both).
If neither the brake lights or the turn signals work, it'll take a little more troubleshooting to find the problem. You could still have a bad turn signal switch, but there could also be a wiring problem.
You may ask why I keep bringing up the turn signal switch, here's why it could be the problem:
On most American cars (that don't have amber lights in the back) the same bulb does the turn signal and brake lights. Something has to coordinate that. The brake pedal makes both lights come on, yet they are controlled individually for turn signal operation. However, if you turn on the blinker while the brakes are apply, it will still flash. How does this work? It's all done in the turn signal switch. When you turn on the left blinker, the left brake light get's disconnected. That switch also isolates the turn indicators on the dash so that they do not light with the brakes.
So, if either the blinkers or brake lights work, then you know the wiring is good (since they use the same wire) and you can start the troubleshooting with switches. If neither works, you'll need to varify that all the wiring is intact, but don't rule out bad switches.
Hope I made since and this helps you out [img]/wwwthreads_images/icons/smile.gif[/img]
'97 Sidekick Sport