Other than the obvious like loose connection, or corroded cables etc, check the following. A bad belt, Check the tensioner on the vehicle, it applies spring loaded tension to the belt providing proper turning force to the alternator. If the belt has excessive play, the tensioner could be bad or the belt has been stretched excessively. The light is controlled by the computer in the vehicle. It detects insufficient charging power and illuminates the light.
2008 ford f150 battery light keeps coming on new battery and alternator checks ok
2008 Ford F-150 XL
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Maintenance & Repair
I have a 1999 f150 4.2 engine. I changed the thermostat which went well, however, after changing the thermostat the battery light is on. What gives?
1999 Ford F-150 XLT LB
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Maintenance & Repair
I have a 2008 Ford F150 that will not start because of a bad ground on the starter relay. Needless to say, I still need to drive around so I've been starting the truck by applying voltage directly to ...
2008 Ford F-150 Lariat SuperCrew 4WD
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Maintenance & Repair
My truck was running fine until last night. I was on my way home and hit the gas to go and the battery light came on, all the lights dimed as well. All the gauges read normal as they should. The al...
2002 Ford F-150 XLT Crew Cab 4WD SB
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Maintenance & Repair
I have a 2005 F150 with a 5.4. my truck died a while back and I replaced the battery and alternator. Its been running fine for months but the battery light is still on. did a fuse or relay trip? The l...
2005 Ford F-150
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Maintenance & Repair
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