SL/R129: 91' 30sl electrical problem
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Joined: Apr 2016
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91' 300sl
91' 30sl electrical problem
Hey,
Recently I noticed a very odd problem in my SL, When I use my turn signals all the dash lights come on, gauges reset, and then return to normal.
I should mention that the battery is brand new and the car has barely driven.
I know that there isn't no magic fix to it, but where should I start my troubleshooting?
Thanks
Recently I noticed a very odd problem in my SL, When I use my turn signals all the dash lights come on, gauges reset, and then return to normal.
I should mention that the battery is brand new and the car has barely driven.
I know that there isn't no magic fix to it, but where should I start my troubleshooting?
Thanks
Thread Starter
Newbie
Joined: Apr 2016
Posts: 12
Likes: 0
91' 300sl
You obviously don't know a lot about any electrical troubleshooting , components and there way of operation , if you would have, you would suspect that a voltage drop/a blown cap at the instrument cluster/ a short and etc.. can cause the problem, I agree with you that poor relay connection can lead to a voltage drop, but it's very unlikely. So in that case I wouldn't mislead others, like you did.
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Joined: Jan 2006
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From: Atlanta, unfortunately
'09 S600, (2) R129 300SLs, '03 SL500, '03 SL55
Don't waste time even thinking about a relay.
Thread Starter
Newbie
Joined: Apr 2016
Posts: 12
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91' 300sl
This is a common problem, and the solution is well-established: remove the cluster from the vehicle, open it up, and replace the 470uF capacitor on the main circuit board. It is by far the largest capacitor on the board, and it is impossible to confuse it with anything else.
Don't waste time even thinking about a relay.
Don't waste time even thinking about a relay.
Is there any guide for removing and disassembling the cluster?
Thanks
Banned
Joined: Jan 2006
Posts: 1,982
Likes: 393
From: Atlanta, unfortunately
'09 S600, (2) R129 300SLs, '03 SL500, '03 SL55
They are probably used in a role where any value above a minimum value works fine. I'll guess 100uF will work fine.
Disassembling the cluster is completely intuitive. No special tools are needed. Nothing at all tricky about it that I can remember.
Disassembling the cluster is completely intuitive. No special tools are needed. Nothing at all tricky about it that I can remember.
