what is wrong when the voltage battery gauge in dash fluxuates when u drive or idle then when u turn the truck off instant no power left with consideration that it only needs to be on a minute for this to happen and doesnt change even for 3hrs like that it has full power till turned off i got a 94 ford f350 xlt 460 7.5l v8

Asked by Jan 29, 2013 at 03:00 PM about the 1994 Ford F-350 4 Dr XLT Crew Cab LB

Question type: Maintenance & Repair

sometiumes it will be fineone daY then i turn it off and when i start it the next morning theres no juice. once even it had no juice and i created a static shock to my steering wheel while sliding out of the truck and the power returned.

1 Answer

The battery terminals are subject to corrosion. You can't even see it because it's on a molecular level, but what is happening here is the classic "brownout" where varying amounts of power can get thru. Probably is a CLUSTER of connections at the positive terminal. Brass wire brush and use some electrical cleaner spray. Do not forget the ground lug attachment. Clean up, and all will be well with the world.

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