E-Class (W124) 1984-1995: E 260, E 300, E 320, E 420, E 500 (Includes CE, T, TD models)

Need Help-brake light issue

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Old Jun 2, 2015 | 01:36 PM
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Thomas1's Avatar
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1986 560sel
Need Help-brake light issue

Hello

I have a 1995 E420 that I have just purchased. Love the car, but it needs some love. Brake light issue- driver side, press brake pedal- 1 bulb lights up bright, passenger side - row of bottom three bulbs all light up dimly.

This is definitely not right. Is this a grounding issue? How can I fix it? Any ideas where to begin? Thanks for the replies and help.
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Old Jun 3, 2015 | 07:16 AM
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1986 560sel
Wow, super negative guy. I have pulled the light trays, checked and cleaned connectors, and checked bulbs. Ground looks ok, but something is shorting. Anyone know any common culprits? I checked the fuses at front of car as well. I am going to try and following wiring in the next couple days.
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Old Jun 5, 2015 | 12:57 PM
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From: Mercerville New Jersey
1991 560SEC Teal 1989 420SEL Ice Blue 1984 500SEC White
Originally Posted by Thomas1
Wow, super negative guy. I have pulled the light trays, checked and cleaned connectors, and checked bulbs. Ground looks ok, but something is shorting. Anyone know any common culprits? I checked the fuses at front of car as well. I am going to try and following wiring in the next couple days.
Have you changed the fuses in the fuse box from the aluminum to copper?
If not that is a good place to start.

The rear tail lights utilize a light bar with a common ground. The strip is held in place by the plastic. Ensure that the light bar is completely seated. They can pop out causing a draw on the system.

Are you getting the bulb out light lit on the dash board?
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Old Jun 6, 2015 | 01:03 PM
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2009 SLK55 AMG. & 2022 GLA250 4Matic
Originally Posted by Thomas1
Hello

I have a 1995 E420 that I have just purchased. Love the car, but it needs some love. Brake light issue- driver side, press brake pedal- 1 bulb lights up bright, passenger side - row of bottom three bulbs all light up dimly.

This is definitely not right. Is this a grounding issue? How can I fix it? Any ideas where to begin? Thanks for the replies and help.
Sounds like a bad ground to me. If there is light but low 99% sure that is what it is. Easy to fix. Just find the wire and trace the ground or make your own. All you need is a clean spot of metal and a self tapping sheet metal screw.
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