[Guest (MBNZ)]

I have a 1992 400SE with an itermittent problem with the right side turn signal lights. When the car is warm or it is hot outside - the turn signal lights stay on - even with the indicator stalk inside in the center position - the only way to get the lights off is to disconnect the #17 fuse - the lights will not stay off until the car cools off - the Lighting control module has been replaced by the local dealer for almost $400 - their next fix will be to replace the multifunction stalk - Anyone have any other ideas? I live in FL where it is warm - the dealer has had the car three times in a month - and still can't fix.

 

[Guest (MBNZ)]

I don't know MB uses flashers (similar in shape to relays) to perform turn signals. I would check that to see if that is the culprit. If the left side is working fine, swap'em. If it is functioning correctly, you should hear a faint click-clack sound when it is on.<br> <br> Also, check the basics: light bulb(s) are good and has a clean ground contact (else clean it).

 

[Guest (MBNZ)]

The former replier is right-- more electrical gremlins are caused by bad contacts than by anything else, but the only way you are going to find out for sure is to take a good VOM (Volt-Ohm-Milliameter), and go through the entire system backwards from the signal light itself, tracing back that live twelve volts until you find out which part is freezing in the 'on' position when it is hot.<br> <br> One hint: in all the 1988 and earlier electrical systems I have worked with, there is only one flasher relay, so that can't be it. Although you can't swap the signal lever, you should be able to swap the WIRES going to it-- if that transfers the problem to the other side, you've found it!<br> <br> ...And don't expect too much in the way of electrical help form almost any mechanic-- practically none of them understand electricity, and if they don't have a step-by-step troubleshooting guide or a diagnosing computer, they're helpless. I supported myself through college by doing piecework for three different foreign car dealers who couldn't read wiring diagrams!<br> <br> Good Luck!<br> Rex