No left turn signal - 1990 300SL 129

[chronodeco]

No left turn signal - 1990 300SL 129 - thought I would post this on the SL pages as no answer yet in general pages. Where are all those sharp SL mechanics?

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1990 300SL - This all started with the rapidly flashing dash lights problem when I turned on the left turn signal. I removed the combination relay (also called the Hazard Light relay) part # 129-820-10-26 and plugged it back in and now I don't have the flashing dash lights but the left turn signal has stopped working completely. Right turn works great - checked the left turn bulbs - all good. Also put in a new fuse for the turn signals. I would like to do some diagnostics on this before I buy a combination relay because they are spendy. I have read several other posts on this and one was solved by a new ignition switch and another with a new switch (I can't find it again). Getting 13.8/9 volts at the fuse box with the engine running.
Also, when I remove the combination relay I broke the plastic piece that holds the female pins in the large socket. This make the job of plugging it back together a REAL PAIN! If anyone knows if I can get the plastic piece separately, I'd like to know. Thanks in advance for your help and advice. Craig
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[bobterry99]

With the left turn signal switched-on, you should measure 12VDC at socket #12 on the connector to the Combination Relay...Otherwise there is a problem with the Combination Switch or wiring to the relay. If you have the input on #12, then your relay is suspect.

[chronodeco]

Thanks for the hint - I'll check it out and let you know what I find. Craig

[chronodeco]

Found it! Loose pin (female) in the center of the large contact plug in the Combination relay. Boy am I glad that was the solution. I want to mention that when I changed the flasher fuse that it was burnt on the top but not burnt out in the center. I am going to replace all of my fuses with the Mercedessourse fuse kit that are all brass. What a STUPID thing for Mercedes to do - aluminum fuses! Craig