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Old 07-02-2008, 08:16 AM   #6 (permalink)
MercedAde
BenzWorld Junior Member
 
Date registered: Mar 2008
Vehicle: 88 260e
Location: Manchester, UK
Posts: 7
Follow-up: relay wiring burn out

I'm diggin up an old thread of mine for some advice about an unusual problem - all suggestions welcome!

I managed to get my 260 up and running again with a new (scrap) fuel pump relay. Good news.

However, within 4 weeks, this relay had packed up too and so I decided, in the meantime, do dismantle the old relay and have a look.

Basically, I found that part of the PCB had burnt through, meaning no power to the pumps. So I soldered a piece of wire across the burnt out section, crossed my fingers, and...have been running it perfectly lke that ever since.

I've just cracked open the 2nd relay unit and found that it had burnt through in the exact same place, so I'll be repeating my soldering trick so I have a back-up.

My questions is: was i just unlucky to have this happen or have I uncovered a deeper electrical problem with my 260 that could be causing the burning out?

Incidentally, I'd recommend it to anyone who has lost the use of their fuel-pump relay - it can be opened and yes it's a complicated-looking object, but the actual repair was 2 minutes long and monkey-simple.
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