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  #1  
Old 09-11-2007, 05:55 PM
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Join Date: Dec 2001
Location: Gig Harbor WA.
Posts: 69
Help! weird electrical problems on my 300SL

I need help with my 1990 300SL!!!!! About a month ago I noticed that my cruise control stopped working, then a few days later I noticed that my head light flash to pass wasn't working and this past weekend my radio antenna no longer goes up or down with the rocker switch. Today I noticed that the radio doesn't go off when I turn off the ignition so I have to push the off button when I remove the key. These all may have started at the same time, i just didn't notice them all at once. I am sure they are all related.

I have checked all fuses under the hood and in the trunk. I even checked the fuse in the OVP relay. They all check out with a meter. Is there another fuse location that is hidden from view? I don't have a wireing diagram so I am unsure where to look.

Any Ideas????

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88 560SL
97 E320
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  #2  
Old 09-11-2007, 06:21 PM
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Join Date: Aug 1999
Location: Florida / N.H.
Posts: 8,804
Charge the bat over-nite and retry all systems..
Low voltage is the suspect..
Second suspect would be OVP or voltage regulator...
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  #3  
Old 09-12-2007, 03:24 PM
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Join Date: Dec 2001
Location: Gig Harbor WA.
Posts: 69
Thanks for the input. My battery and charging system are in good condition. but I don't know about the OVP. I did check the fuse on it and it was good. I am also think that I have a bad ground wire some place but it will be tough to find without a wireing schmatic. Does anyone know a source for the wireing diagram for my car? Is there a way to test the OVP? Thanks

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88 560SL
97 E320
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