Question about 1989 Ford F 150
Charged battery for a long time with only the positive side unhooked, when hooking back up it sparks
You should always disconnect the neg. side of the battery when you disconnect. This is prevent a power surge to the ECM. The sparks you find is it's detecting something is on. It could be as small as the radio constant (memory).
Posted on Jun 23, 2008
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Posted on Jan 02, 2017
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