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#1
10-24-2005, 12:12 PM
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Burned-out bulb warning light
The car is a 1994 C280.
I'm getting the yellow warning light that indicates I have a burned-out bulb somewhere. The lamp goes out when I shut the car off, and doesn't always come back on the next time I start the car. I have checked every bulb on the car (headlights, turn signals, brake lights, fog lights, parking lamps, reverse lights) and cannot find a burned out bulb. Is there another reason this warning light might come on? I know sometimes that an ABS warning light can be a signal that the OVP is about to go, or that there is a charging problem with the alternator. Is there anything like that I should be looking at for the burned out bulb warning light? Thanks, Jonathan 
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#3
10-24-2005, 01:52 PM
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I didn't check the licence plate lights. That's a good thought. Thanks.
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#4
10-24-2005, 02:35 PM
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You can rule out a number of bulbs with a few simple steps.
Start the car. If the indicator is NOT on, then turn on the headlight switch. If the indicator comes on, then it's one of the bulbs activated by the headlight switch (including the license plate light). Many bulbs to investigate here including the parking bulbs. BTW, cockpit lighting does not affect this system. Shut the car off and restart each time to clear the system. Sometimes the indicator will not turn back off with the different steps. Depress the turn signal stalk either direction or switch on the hazard switch. If the light comes on, you can narrow it down to which side. Sometimes the indicator comes on and off in this situation. Tap on the brakes. If the indicator comes on, it's the brake bulbs in the taillights OR the third brake light (most of us forget to check that one). Put the car in reverse. If the light comes on, then it's one of the reverse/back-up bulbs.
__________________
2009 ML350 (106K) - Family vehicle 2001 CLK430 Cabriolet (80K) - Wife's car 2005 BMW 645CI (138K) - My daily driver 2016 Mustang (32K) - Daughter's car
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#5
10-24-2005, 02:49 PM
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Quote:
It's a Canadian car with Daytime Running Lights.  As soon as you start the car, the headlights & taillights come on.
__________________
2007 C 230 Sport.
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#6
10-24-2005, 04:07 PM
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Quote:
__________________
2009 ML350 (106K) - Family vehicle 2001 CLK430 Cabriolet (80K) - Wife's car 2005 BMW 645CI (138K) - My daily driver 2016 Mustang (32K) - Daughter's car
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#7
10-24-2005, 05:18 PM
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Intermittent lamp out MIL. I would suspect a failing or loose side marker bulb in the taillight assembly. Everytime I have one of those intermittent lights I do an immediate walk around...usually find one of the tail side markers dark. A quick tap on the lens fixes it, if that works for you it means that filiment is ready to give up the ghost.
__________________
Mike Tangas '73 280SEL 4.5 (9/72)- RIP  Only 8,173 units built from 5/71 thru 11/72 '02 CLK320 Cabriolet - wifey's mid-life crisis 2012 VW Jetta Sportwagon TDI...at least its a diesel Non illegitemae carborundum.
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#8
10-24-2005, 09:15 PM
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I had a head scratcher like that. It turned out to be broken wires at the trunk hinge that made intermittent contact, thanks to the brittle wiring insulation of that era.
__________________
95 E320 Cabriolet, 159K
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#9
10-25-2005, 11:02 AM
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Thanks to everyone who offered their thoughts. The $64,000 prize goes to Manny. It is a licence plate light. I'll get around to it.
Jonathan
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