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Old 01-05-2003, 03:06 PM
waybomb's Avatar
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Join Date: Nov 2002
Location: St. Joe, MI; Manitowoc, WI
Posts: 1,553
Help - fuse 11 draining battery?

Hi fellow diesel-heads,

If I leave my 1982 300D sit for a few days, the battery drains. With the car off, I get about 5vdc reading at fuse 11, both sides of the fuse. If I pull the fuse, I still get about 5 volts on the back side, and nothing on the front. A previous owner must have had some sort of problem because there is now an ATO fuse holder soldered in place. Putting the fuse in and out, I occasionally hear a clicking somewhere in the relay area, but have not pinpointed what is clicking.

The fuse box manifest says fuse 11 is for - blower moter, A/C compressor, and switch-over valve idle stabilization.

I disconnected the A/C comp, with no change.

I'd disconnect the blower if I knew where to do that. I turned off the fan at the switch (it does not run with the key off) and I turned off the hvac control with the "O" switch with no change.

Lastly - what is the "switch-over valve idle stabilization", what does it do, what controls it, what does it control, and how is it tested?

Any ideas what my car's problem could be?

Thank You
Fred Konchan

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