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Old 01-19-2003, 03:17 AM
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Cool electrical short

1989 300e gas. battery drains If I pull #8 fuse, delay entry relay clicks as soon as fuse is re-installed, and drain is gone. I replaced relay, with same result. I can't find a book locally with wiring diagram, and have no owners manual, so I don't even know what the fuse is for, biut if I don't pull the fuse, and re-install, each time I exit the vehicle, the battery croakes, and quickly.
Thanks for any info,
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Old 01-19-2003, 12:32 PM
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Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
It sounds like you have a diode failure in one of the control units. Possibly the warning module.
Donnie Drummonds
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Old 01-19-2003, 01:23 PM
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Join Date: Nov 2002
Location: Orange County, CA
Posts: 95
Try getting the service CD on Ebay. It has the entire wiring diagram and you can track each circuit behind each fuse.

It helped me with a drain that turned out to be the trunk light remaining on. It was because I removed the panelling that the switch pushed against and would not turn off the light.

Good luck!

'87 300D (178km)
'01 CLK 430 Convertible (21km)
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