battery indicicator light

[oldhatt53]

what causes the battery indicator light to stay on?

[HVAC SuperTech]

the alternator not putting out what it should. Thats the ONLY thing that cuts the light on. check your connector(the 2 wire one) on top of the Alt for a good connection. if you have a DC voltmeter, check what the alt is producing between the positive on the alt and the battery ground.

[fordfan30]

The wire that goes to the regulator is fused I think and if this (fuse) is bad it wont recieve a signal to turn on voltage regulator on so your light will come on. You would have zero output from alternator. Someone correct me if these trucks dont use a system like this.

[pete37922]

i always thought when the light comes on and ur connections are good, means u need a new alt. !!!

[HVAC SuperTech]

I dont know about the wire being fused or not.


Also, you can test the alt. to ground for the DC output. that way you will know if the alt is bad.

[oldhatt53]

thanks to all who responded. the alternator was bad. Now replaced and back on the road.

[SCUFFY828]

for the record , there isnt a fuse on that circuit for the alternator , there is a link of wire on the passengers side where to me may have could have been used as a fusible link , but its just a looped wire , dont know why it was done that way , either way , alternator usually fixes this concern , glad you got it taken care of