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  #1  
Old 10-11-2013, 02:03 PM
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Join Date: Aug 2007
Location: SE Mich
Posts: 3,284
Trouble with the Trouble Lights

My trouble light on the dash was perpetually on when I turned on the headlights for night driving.

When I bought the car from benhoigan, he noted that a simple tap would get the lights on and the dash light would go out.

I had some time and replaced the tail light when it would no longer light following a tap.

The lights function perfectly but the dash light still stays on.

Advice?

Suggestions?

The lights are working fine, it's the feedback circuit that needs some service.

__________________
Strelnik
Invest in America: Buy a Congressman!

1950 170SD
1951 Citroen 11BN
1953 Citroen 11BNF limo
1953 220a project
1959 180D
1960 190D
1960 Borgward Isabella TS 2dr
1983 240D daily driver
1983 380SL
1990 350SDL daily driver alt
3 x Citroen DS21M, down from 5
3 x Citroen 2CV, down from 6
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  #2  
Old 10-11-2013, 02:37 PM
sixto's Avatar
smoke gets in your eyes
 
Join Date: Jun 2000
Location: Eastern TN
Posts: 20,841
If it were a 124 I'd say check closely the metal strips in the tail lights that serve as bulb holders. Over time the tabs that hold the metal strips to the tail light cover loosen causing poor contact between the bulb and springy terminals. I didn't think 126 were similarly affected but have a look see.

If the warning light comes on and off with the switch, it's one of the running lights or headlights. If it comes on and stays on when you apply the brakes, it's one of the brake lights. Some folks miss the license plate light when checking. If all the bulbs illuminate, find a replacement bulb warning module. It's the long one in the relay box. My '87 SDL warning light would come on over bumps and potholes. Something rattled inside the relay.

Sixto
87 300D
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  #3  
Old 10-11-2013, 09:00 PM
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Join Date: Aug 2007
Location: SE Mich
Posts: 3,284
Quote:
Originally Posted by sixto View Post
If it were a 124 I'd say check closely the metal strips in the tail lights that serve as bulb holders. Over time the tabs that hold the metal strips to the tail light cover loosen causing poor contact between the bulb and springy terminals. I didn't think 126 were similarly affected but have a look see.

If the warning light comes on and off with the switch, it's one of the running lights or headlights. If it comes on and stays on when you apply the brakes, it's one of the brake lights. Some folks miss the license plate light when checking. If all the bulbs illuminate, find a replacement bulb warning module. It's the long one in the relay box. My '87 SDL warning light would come on over bumps and potholes. Something rattled inside the relay.

Sixto
87 300D
Thanks will check after I change the glow plugs tomorrow!

__________________
Strelnik
Invest in America: Buy a Congressman!

1950 170SD
1951 Citroen 11BN
1953 Citroen 11BNF limo
1953 220a project
1959 180D
1960 190D
1960 Borgward Isabella TS 2dr
1983 240D daily driver
1983 380SL
1990 350SDL daily driver alt
3 x Citroen DS21M, down from 5
3 x Citroen 2CV, down from 6
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