0
Until an expert improves this answer, a layman's view will have to do. I drive both a '93 and an '89 F-150, and am not experienced with your newer model. However, the symptom you describe is generic in nature, and I suspect is the result of a drive belt which slips only at high rpm, allowing the alternator rpm to decrease, triggering the low voltage indicating "idiot" light to come on. As always, it is possibe that the cause could be from some other source, such as, possibly, a defect in the voltage regulating circuit which reduces the alternator output during periods of high rpm. Still, my first suspect is the slipping drive belt.
Wiki User
∙ 16y ago
Add your answer:
Earn +20 pts
Why would the low range light come on when you are in high range 4x4 on a 1999 Ford F150?
a range is were a cowboy washes his bull.
What is a Ford F150 v6 4.2Liter engin light code po408?
P0408 - EGR sensor B circuit High Input
Why does my Ford F150 engine rev real high for no reason?
because fords suck.
Why your 1988 ford f150 fan control speed only runs on the high speed why is that?
cause its a ford and there pieces of s**t
1999 ford f150 where are the air conditioning connections high and low side?
The low side is on the accumulator and the high side is on the discharge line......
Ford F150 P0118 coolant temp curcuit high input what to do next?
Replace the coolant temp sensor
How do you fix Ford f150 check gauge light is on and engine won't start?
I'm not a mechanic / technician but by any chance are you out of gas The CHECK " GAGE " light on my Ford EXPLORER would come on if the engine coolant temperature is too HIGH , the engine oil pressure is too LOW , or the gas gauge is at or near empty
Why does blower fan only work on high on Ford f150?
Blower Motor Resistor is bad. 20.00 part at AZ.
What does the check gauge light mean on a 2002 Ford Ranger?
On a 2002 Ford Ranger : The check " gage " light comes on if : The engine coolant temperature is TOO HIGH The engine oil pressure is TOO LOW or The fuel gauge is at or near empty
Where is the location of the horn on a 2005 F150 Ford truck?
The 2005 f150 has two horns. One emits a low tone and one emits a high tone. The horns are located under the front bumper.
98 ford f150 air conditioning only works on high?
My guess would be the blower motor speed resistor is burned out.
Where is the high beam fuse location for a 1997 Ford F150 super cab with a 4.6 V8 engine?
fuse # 16 - 20 amp - High Beam Headlamps
