Hi there, any idea why my rear lights (all 4 bulbs) on my 67 GTO would stay on after the engine is turned off? Main lights switch is off, front lights are not on. All 4 lights usually come on when brake pedal is selected, so could it be the pedal switch that has failed or stuck on? Disconnected the battery and reconnected and they're still on.
Also the solenoid on the starter seemed to stick also. Not sure if related or not?
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Sounds like your brake light switch at the brake pedal is either going bad OR out of adjustment. Simple test, just pull your fuse for your brake lights. If they go out, problem solved -get a new brake light switch as they do go bad over time. Easy enough to replace.
Solenoid sticking is a separate issue. Most likely
your solenoid is telling you its going bad. The solenoid is very close to your exhaust manifold and over time the heat effects its performance. There is a heat shield that goes over it that helps and can be purchased from aftermarket Pontiac parts suppliers -which I recommend to get & install before putting your starter back in. So, I would simply replace the solenoid (or put a new starter/solenoid on or have the unit rebuilt if you think you might just want to take care of them both while you have the starter out). You can also inspect the solenoid wires to make sure you have no brakes or corrosion in the wires as this too can cause problems.
I might opt for having your starter rebuilt. If you get a different starter, sometimes you can have issues with starter/ring gear clash/whine as you crank it over and then you will have to shim the starter to correct this. No big deal as this is a "normal" fix right from Pontiac at the factory. You may already have shims on yours, if so, make sure you save them and re-install them.
If you replace the solenoid/starter and you still have problems, then you will have to look at other causes, ie ignition switch might be worn out -basically, this is normal stuff that can go bad on older Pontiacs.