Alternator ground wire.
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From: Whately, Ma
Alternator ground wire.
My 79 F1504x4 keeps draining the battery, about once a week. In March I replaced the starter, alternator, battery, starter solinoid, and cleaned everything attaching these parts. I noticed when I swapped alternators there wasen't a ground wire, my 71 F1004x4 has one though. I figure its either the voltage regulator or the missing alternator ground. Is an alternator ground important? The motor is a swapped-in '74 351W.
Last edited by 78f3504x4; May 19, 2004 at 07:47 AM.
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From: SD
The alt should be grounded through the case to the engine.
To test for battery drain, unhook the neg batt cable and install test light from cable to batt terminal. If there is a drain, it will light up. Now unhook one thing at a time until the light goes out (be sure the doors are closed - dome light will cause a false drain). Start with the voltage reg and alt, then try each of the fuses in the fuse box. If one of the fuses turns off the light, then reinstall the fuse and unhook each item that the fuse runs until you've found the problem.
Let us know what you find.
Marty
To test for battery drain, unhook the neg batt cable and install test light from cable to batt terminal. If there is a drain, it will light up. Now unhook one thing at a time until the light goes out (be sure the doors are closed - dome light will cause a false drain). Start with the voltage reg and alt, then try each of the fuses in the fuse box. If one of the fuses turns off the light, then reinstall the fuse and unhook each item that the fuse runs until you've found the problem.
Let us know what you find.
Marty
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