I was trying to troubleshoot my door locks by unplugging the vacuum pump in the trunk. I unplugged it, plugged it back in, pump ran about 30 seconds and shut down. I unplugged it again, and plugged it back in this time it didn't start. Messed around some trying to trace down the vacuum line coming from the pump. Then I called it quits.

Next day I noticed my clock and radio are not working. Thinking I must have blown a fuse, I tested all the fuses with a voltmeter (ohms). Found one that I was getting a higher resistance reading than the others. Replaced it with a spare (tested the spare also). Still nothing.

Is there a relay somewhere that may be bad, do I need to unplug my vac pump? Any suggestions greatly appreciated.

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1989 300E
103,500 miles

1982 300SD
Sold but not forgotten