Question about 2005 Ford F-150

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2002 F150 Radio went dead, noticed voltage dropping almost completely. Turned off heat and lights. Shortly afterwards, voltage returns back to normal. Everything is operational. I let run for 15 min to help recharge battery. Came back and voltage was completely gone again. Dead Cell? Bad voltage regulator? Bad Alternator?

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The gauge in your truck reads the alternator output. Following are the possible causes:

1. Belt is slipping
2. Battery is shorted
3. Poor connection at battery or to frame
4. Alternator failing

The fact that it came back after turning off the heat and lights, I suspect the belt, and would start there.

Posted on Nov 12, 2009

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