ALT light

[sixy]

This is probably an easy question, but I thought I'd ask anyway.

Normally the ALT light turns on with the first turn of the key and goes off once the truck is started, but today it stayed on. Does this mean that the alternator isn't charging the battery?

Thanks!

[fordman]

wiggle the key first. then take the truck to a parts place and have them test the system for charging. most will do it for free. the regulator is the one that tells the alternator how much to charge. heck it could even be a loose alternator blet that would cause the light to stay on too.

[70_F100]

wiggle the key first. then take the truck to a parts place and have them test the system for charging. most will do it for free. the regulator is the one that tells the alternator how much to charge. heck it could even be a loose alternator blet that would cause the light to stay on too.

But, to answer your original question, no, your alternator is not charging the battery.

[sixy]

Thanks! The belt is tight and I wiggled the key a bit, but it still stays on. I'll take it down to Advance and have 'em test it. Thanks again!