My 1993 f 150 new battery goes dead after setting for 1 to 3 days why ??

Asked by Jul 28, 2014 at 04:47 PM about the Ford F-150

Question type: Maintenance & Repair

1 Answer

118,365

Draw on the battery after the key is turned off, recharge your battery and disconnect the negative cable, put a test light between the battery terminal and cable end, if the light turns on bright then you indeed have a draw, the first thing to check is the alternator by disconnecting it electrically, if the light goes out then your have a bad diode inside the alternator, if the light doesn't go out then start removing the fuses one at a time until the light goes out, note when each fuse goes while doing this test, once you find the circuit that is turning on the light then you have to trace it out to find what component is causing the draw. Good Luck.

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