X2 on the electrical connections - especially the negative line.
If you look closely, you may find that there is no "ground" wire, but that the connection relies on the bolts anchoring the jack to the frame. If these have corroded over the years, cleaning them up may solve your problem.
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IanP, the man from Scotland
Julie, the Lady From Little Rock
Jay Feather 19XUD, pushing a Jeep Grand Cherokee
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