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Old 09-27-2010, 06:01 PM   #1
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Question One Headlight Slightly Dimmer

What could cause 1 headlamp to be slightly dimmer than the other?

Going bad?

Are these sealed lamps or can you just replace the bulb?

If you can, it is 4 bulbs or 2? (for hi / low)

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Old 09-27-2010, 06:09 PM   #2
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usually a bad ground somewhere, or 2 different headlamps with slightly different color temperatures.

you have to replace the whole lamp, but they're really not any more than the small bulbs. you need a 7" lamp. they do both high and low beams.

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Old 09-27-2010, 08:15 PM   #3
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x2 on the ground-check that out.Bad grounds are the main cause of many electrical issues!
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Old 09-27-2010, 08:29 PM   #4
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Check to see if they are the same lights. Dumb sounding I know, but since the lights all look similar they will have different outputs. Thats why one of mine are dimmer because 1 is different since I've bought it.
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Old 09-28-2010, 06:20 AM   #5
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Bad grounds usually make the headlight orange/yellow. If it's only slight but still white it is most likely just different model sealed beams or one is very old. I always replace mine in pairs.
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Old 09-28-2010, 06:23 AM   #6
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Always replace your headlights in pairs, otherwise you'll chase the "one dimmer" light forever. They're cheap and there's no reason not to replace them both when one gets dimmer.
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Old 09-28-2010, 06:28 AM   #7
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I replaced my headlights shortly after I got my TJ with H4's and upgraded them to 100w and now to 130w Xenon bulbs. Much better at night since street lights out here are far and few in between.

And yes you must use relays or your headlight switch will overheat and melt the harness/switch.
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Old 09-28-2010, 10:07 AM   #8
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Besides the bad ground, check the harness plug that connects to the headlight also. You could have some corrision in there giving you a bad connection. Also make sure it's pushed on all the way.
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Old 09-28-2010, 12:53 PM   #9
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Shortly after I replaced both mine I got a tiny hole in one of the lenses from a rock. It is now a bit dimmer so it's time to replace them. I always replace both just 'cause I'm like that.
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Old 09-28-2010, 01:53 PM   #10
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One being dimmer is very likely caused by either a bad/weak ground as already suggested, or the connector on the headlight is dirty/loose/corroded. Remove the ground connection where is is screwed to the tub and use a wire brush to clean it up and the spot on the tub it is screwed to, then solidly reattach the ground wire back to the tub. Then pull the connector off the headlight and wire brush its contacts. Then reinstall/remove/reinstall the connector back onto the headlight 3 or 4 times to clean the female connectors inside the connector itself.

Doing those two things should brighten the dim headlight back up. Doing the same thing to the other side wouldn't hurt.
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Old 10-01-2010, 07:31 PM   #11
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Question Asked / Question Answered

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thanks guys!
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Old 10-01-2010, 07:32 PM   #12
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So are ya gonna make us drag the results outta ya?
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Old 10-01-2010, 09:06 PM   #13
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lol!I'll bet Jerry and us were right!
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Old 10-01-2010, 10:43 PM   #14
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Hey! There could've been a hole in the lense.....just maybe.
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Old 10-01-2010, 10:43 PM   #15
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Hey! There could've been a small rock chipped hole in the lense.....just maybe.
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Old 10-02-2010, 09:19 AM   #16
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Quote:
Originally Posted by JeepnJim View Post
Hey! There could've been a hole in the lense.....just maybe.
A hole in the lense would cause an immediate burn-out of the filament since he is running the factory sealed beam headlight. Only some aftermarket headlights use bulbs where a hole in the front lense wouldn't cause the bulb's filament to burn out.
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Old 10-06-2010, 11:49 AM   #17
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I'll let you know as soon as I get off my ass ...

It sometimes takes me a day (or week) of self motivation to actually stop and check it out.

Worst comes to worst, I'll just replace both. But I'm hoping (as per jerry's suggestion) just a good scrubbing with a wire brush on the connections will do the trick.

again, thanks for the suggestions, I'll re post after I take a look inside....
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Old 10-06-2010, 12:01 PM   #18
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Get off your ass, turn the boob tube off and get 'er done... it'll take all of ten minutes start to finish.
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Old 10-06-2010, 12:02 PM   #19
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Install HID headlights on them. Much brighter!
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Old 10-06-2010, 03:11 PM   #20
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Quote:
Originally Posted by Jerry Bransford View Post
So are ya gonna make us drag the results outta ya?
I guess he is too busy to reply.
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Old 10-06-2010, 08:23 PM   #21
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Still ridin' bobo,eh?Get off your duff and fix it!I have extreme OCD when it comes to my Jeep-that's the sort of thing that I would even fix in the dark in the winter with a temp of 20 degrees and wind chill of 10 degrees!Why?Because I can't ride bobo!

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