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Flickering lights, on a Cadillac STS, is usually a sign of a loose wire. When all of the lights flicker, it is an indication of a loose battery ground cable.
EzrvvesnMost likely it's a loose wire or bad ground of the bulb socket. its the hand brake swithch
If all of the lights flicker I would check for a loose or corroded ground. If only 1 light flickers then check to see if the bulb is properly plugged in to its socket, or if there is dirt, corrosion or rust causing a poor connection.
Your entire automobile electrical system is grounded to the frame of the vehicle. A loose or corroded ground wire can cause the dash lights to Flickr and the car to stall out.
check the dash board ground connection...it may be loose
A loose battery cable can cause your vehicle to on most stall and it can cause the lights to Flickr. Make sure your battery cables are tight and free of corrosion.
Sometimes the ground strap to the body of the car can come loose. This will cause things to flicker. Ground from the battery needs to be connected to the engine block, the frame, and the body to keep things working properly.
Loose ground?
That's kinda weird. I have a guess, though. I'd check for loose connections in the light sockets or wiring, primarily a loose ground wire.Let us know what you find.FriPilot
Yes
A loose or corroded ground wire will cause the fuse to blow. Check the ground wires on your brake lights.
Start by checking the grounds. There's a loose connection in there somewhere.