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Old 12-05-2003, 11:10 AM
Posts: n/a
Headlights dim jiggle then bright

HI all,

I am almost afraid to post this question.

My headlights, either one, will sometime be bright and fine and sometimes will dim. I get out of the car, pop the hood, jiggle the assembly and wiring and then bright again. I could understand one side, but not both.

My trunk light failed last year and now my reading light has just failed (I hope it's only bulb) trunk light is not bulb or switch.

Could there be or is there a history of underlying wiring harness problems with this car 1992 300e 2.6? I've read about disintegrating harnesses, I hope it's not my car.

Any thoughts would be greatly appreciated.

PS> Both headlight bulbs recently replaced.

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Old 12-05-2003, 12:45 PM
I told you so!
Join Date: Jun 2002
Location: Motor City, MI
Posts: 2,804
After 11 years in New Hampshire, it is likely you have a corroded connection. Take the connections apart and see if you can find the corrosion. After cleaning, it's a good idea to dress the connection surfaces with silicone grease(dielectric grease) to help keep the corrosive environment out of the contacts.

If you suspect brittle insulation on the wiring harness, take the wrap off part of the wiring so you can inspect the insulation. The condition should immediately present itself.
95 E320 Cabriolet, 140K
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Old 12-06-2003, 09:49 PM
Posts: n/a
Thank you Kestas.

Will do,
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Old 12-06-2003, 11:27 PM
Registered User
Join Date: Mar 2001
Posts: 326
The connector for the headlight will deteriorate over time causing a poor contact with one (or more) of the terminals. The connector is easily replaced.
Scott Diener
89 300E
93 300E
92 Volvo 740 Wagon aka "Mutt mover"
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