Electrical problem
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Freshman User
Joined: Jan 2005
Posts: 32
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Electrical problem
My 91 F-250 has an electrical drain. If my trucks sits for a day without being driven it has to be jump started. I had the batteries tested and the batteries are perfect. The alternator checked out good also. I drive everyday except on weekends sometimes. I park outside but it does not get that cold here to drain the batteries. I have everything off (radio lights etc) It is a plain jane. No electric windows or doorlocks. Radio is stock radio and no aftermarket equipment. Has anyone had or has the problem?
Posting Guru
Joined: Oct 2005
Posts: 1,030
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From: Powell River B.C.
A working alternator can have a diode shorted out which will allow current drain off when not running. Do have have a meter that you can check that out with? Disconnect the alternator output lead, you should have contenuity to ground one way, and not the other if you switch your positive and negative leads during a check.
Confirm by leaving the alternator disconnected overnight to see if your batteries do not drain off! Good luck
Confirm by leaving the alternator disconnected overnight to see if your batteries do not drain off! Good luck
