by Philip » Tue Jan 01, 2008 8:49 pm
Unhook the positive battery cable. Hook a volt meter up. Hook the positive lead to the battery terminal. Hook the negative lead up to the battery cable.
Disconnect the under hood light if you have one. Pull the fuse for the radio and dome light. Those are common things that would pull power in the off condition.
If you show any voltage on th emeter this is a drain. Go to the big one first. Unhook the leads off the alt. All of them. There is a plug about 12' from the alt. Unplug it. That gets the fields. The unhook the main charge wire.
If you drain drops to 0 after you unhook the alt. Then you got lucky. Throw an alt on it and recheck after the new alt is installed. I have gotten bad ones off the shelf before.
Let us know what you find.
BTW do not turn anything on with the meter hooked this way. It might blow the meter.
93 W350 Club/cab w/duals, buckets & console, B&W flatbed, G56, 6 spd, 3:07 rears, gages, HX40/16, 4" exhaust, 6X.018 sticks, rear air ride suspension