Question about Ford F-150

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As i was driving my truck shutoff completely.NO POWER to anything at all

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The first thing to check is the charge condition of the battery. If the alternator failed while driving, the battery would drain fairly quickly depending on what was turned on. If the battery is indeed discharged, it needs to be recharged with an external charger--about 8 hours at 2-4 amps, about 2 hours with a high current charger (~20 amps). When the battery is charged, try for start. If it acts ok, then measure the battery voltage with the engine running--it should read 13.5 volts or more if the alternator is working. If the alternator is in trouble, you will likely read 12.6 volts or less. Take the truck to Autozone or similar business that gives free checks on the charging system. If the alternator developed a shorted diode, it will cause a fusable link in the wiring harness to burn out (like a fuse), but is more trouble and money to replace. The alternator must be replaced before the link is replaced. Hope this helps!

Posted on Oct 02, 2010


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