1983 accessories work when engine off, but not when running.

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20 Oct 2011 18:51 #6561 by mb230sl
hi all,

i've just joined up to the forum in the hope of being able to help a friend who has recently purchased a 928 in need of some TLC.

i am a mechanic specialising in classic Benz stuff, but thought i should call on some assistance of the "been there, done that" kind.

i've been sorting through various issues, such as a dead master cylinder, stale fuel, plugs - usual stuff - and have now moved on to the electrical system.

the essential problem is that when the car is running, nothing seems to work - headilghts, windows, wipers, etc. when the ignition is switched on, but the car isn't running, everything works (except the electric seat - which is the fuse/relay for this?)?

any tips would be greatly appreciated


regards
davide

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20 Oct 2011 19:05 #6563 by WyattsRide
I'm by NO means an expert or even close to novice on these cars. But, from what I've read, is that a lot of electrical troubles such as those you describe, could be a result of the ignition switch itself being bad. If anything, at least that could be something to check out.

I hope more knowledgeable blokes chime in.

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20 Oct 2011 20:32 #6567 by pcar928fan
Yup, I vote for the ignition switch too! Pretty inexpensive part (less than $100) and not to bad to install. When they go bad ALL SORTS of seemingly unrelated problems start to show up. Some of them start out as intermittent too so it is a cheap easy thing to replace and see if that fixes the problems!

James
78 Silver / Black-white #295
84 Ruby Red / Black AO84
88 Dark Blue / Linen-Black
92 Polar Silver / Dark Blue 92EURO
93 Arrow Blue / Black

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20 Oct 2011 22:24 #6568 by mb230sl
thank you - igniton switch it is! jiggling the key restores functionality.

how about the electric seat? which is the fuse/relay?

also, does anyone happen to have a good warm up reg for sale?



davide

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21 Oct 2011 02:03 #6569 by srshaw3
928 Specialists has fuse/relay panels layouts online. Go to 928gt.com and you will see "928 Fuse/relay Charts" in the left hand navigation.

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22 Oct 2011 00:39 #6571 by 928mac
BTW Dave, thanks for checking us out and stop by any time just to chat.

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22 Oct 2011 07:59 #6573 by mb230sl
thanks again for the help, will check out the website in question.

and Brad, i daresay ill be seeking further assistance as the saga unfolds.

is there a company which might be able to help with a good used, or exchange warm up reg?



davide

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22 Oct 2011 08:19 #6574 by martinss

thanks again for the help, will check out the website in question.

and Brad, i daresay ill be seeking further assistance as the saga unfolds.

is there a company which might be able to help with a good used, or exchange warm up reg?

davide


Check with 928intl.com/

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