Question about 2004 Ford F150
Was the light on before you changed the alternator? Check a couple of things: Check the connections if one is loose you may be running mainly off the battery but still show it's charging. Have you checked the battery under a load? Try checking the battery voltage with the car off and turning on the headlights. What does it read? 12.2 sounds like you may have a dead cell or if you have a bad connection you may be draining it. Sometimes a battery may show correct voltage but when load is applied it drops like a rock. if this happens replace the battery. Did the idle change when you changed the alternator or has it always been low?
Posted on Dec 29, 2010
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Posted on Jan 02, 2017
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