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914World.com _ 914World Garage _ SOT - ARGH I hate electrical issues

Posted by: Garold Shaffer Oct 4 2010, 11:00 AM

ARGH!!!!!!!!!!!!!!!!!!! Since replacing one head and both sets of gaskets for my 91 range (170K miles) two weeks ago I now have a Fning electrical bug.

After two days of sitting the battery is dead. I have something that is draining it, but have yet to find it. The Alt is good, puts our 14.5V, Battery shows 13.8 at the terminals when truck is running and 13.5 when off. Let it set for a few days and the battery is almost dead, only showing 6v. I have replaced the battery last week and it s GOOD. Once I jump it and getting running battery charges up.

So my project this week is finding what the heck is going on. Just what I need another project.

Thanks for letting me vent.

Posted by: dr914@autoatlanta.com Oct 4 2010, 11:16 AM

Start by removing the positive terminal from the positive post of the battery. Next connect a test light between the terminal and the post. IF it lights brightly the car has a drain. Next with the key in your pocket and the radio and turn signal off, begin to remove one fuse at a time, until the light goes off. THAT is the circuit with the drain. If none of the fuse removals turn off the light, pull the alternator plug into the relay board. If the light goes off then, a diode in the alternator is leaking voltage causing the drain.
That is a start.

Posted by: Garold Shaffer Oct 4 2010, 06:47 PM

Thanks George, gives me a starting point.