Labor Day Putting down your wrenches or time for
MORE wrenching? 
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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Oct 2011 Posts: 118 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2011 Posts: 118 | what makes the right side of my headlight and parking light brighter than left side, bad ground? | | | | | Joined: May 2001 Posts: 7,438 Extreme Gabster | | Extreme Gabster Joined: May 2001 Posts: 7,438 | | | | | | Joined: Aug 2005 Posts: 6,377 Ex Hall Monitor | | Ex Hall Monitor Joined: Aug 2005 Posts: 6,377 | You don't say what year vehicle. If it's old enough to have separate bulbs in a reflector it could be tarnish on the reflector on one side. I have that issue with my '38 to a minor extent. In my case it isn't bad enough to require re-silvering.
Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.
| | | | | Joined: May 2005 Posts: 8,983 Sir Searchalot | | Sir Searchalot Joined: May 2005 Posts: 8,983 | As said , need to know year??? If it is two separate lights (headlight and parking) then they have separate bulbs, probably separate wiring and ground. Their common connection would be the switch possibly. Or any terminal block they both share. If both have a wire from the bulb housing to the same ground, then that is probably the problem. If they have different ground spots, probably not ground problem. At any rate, play around with the ground while lights are on, try to establish another ground with a test wire. Check switch connection. Check any other common connections. A dim light does usually mean ground, you are correct.
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn
| | | | | Joined: Oct 2011 Posts: 118 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2011 Posts: 118 | it is a 48 gmc 1/2 ton...all new wiring, lights new, everything electrical is new, back to drawing board, thanks guys... | | | | | Joined: Aug 2005 Posts: 6,377 Ex Hall Monitor | | Ex Hall Monitor Joined: Aug 2005 Posts: 6,377 | Turn your lights on with the bulbs disconnected. Use your multi-meter to determine the voltage at each socket. If they don't match side to side you have some searching to do.
Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.
| | | | | Joined: May 2001 Posts: 7,438 Extreme Gabster | | Extreme Gabster Joined: May 2001 Posts: 7,438 | It may be the old rusty inner fender bolts aren't making a good ground. Sounds illogical but it wouldn't hurt to run a jumper cable from the fender to the frame and see if it affects the lights. | | | | | Joined: Dec 2003 Posts: 1,144 'Bolter | | 'Bolter Joined: Dec 2003 Posts: 1,144 | With the 48 1 ton I had years ago it was a bad groun on dim side. New ground wire and it brightened right up. | | | | | Joined: Oct 2011 Posts: 118 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2011 Posts: 118 | hi guys, found problem, couple things, first, ground wire came unhook, second, had couple wires in wrong spots, everything working great...thanks guys | | | | | Joined: May 2001 Posts: 477 Shop Shark | | Shop Shark Joined: May 2001 Posts: 477 | yeah, when you turn on the lights and the toilet flushes inside the house, there's a problem.......
glad you got it sorted out. | | | | | Joined: Aug 2005 Posts: 6,377 Ex Hall Monitor | | Ex Hall Monitor Joined: Aug 2005 Posts: 6,377 | .....second, had couple wires in wrong spots...... Been there, done that. At least you didn't let the smoke out.
Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.
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