[Konham]

My bronco starts up just fine but when i turn on the headlights it immediately stalls out

without lights on it shows perfect voltage and no battery light

need help!!!

 

[monkeyhouse]

someone had the same problem the other day. i tried to search for it but i didtn turn anything up. id try searching for that thread because there were alot of replys for it.

 

[Konham]

found the thread but there was no conclusion

 

[Bronco Rob]

Run to your local auto parts store and have them check the charging system. See if it is working right. i know autozone has a little crash cart they bring out and test it. Sounds like an alternator to me.

 

[Konham]

when i try to start it with the lights on the starter cranks the engine nicely, but doesnt fire up. Like its not getting spark with the lights on. Or is it not getting fuel with the lights on??

 

[monkeyhouse]

what do you got? football stadium lights? j/k

 

[Bronco Rob]

when i try to start it with the lights on the starter cranks the engine nicely, but doesnt fire up. Like its not getting spark with the lights on. Or is it not getting fuel with the lights on??

Your starter consumes a lot of current to turn your motor, your lights require alot of current to be on (elements are basically heat, heat draws a lot of current)

With those two main things trying to work at the same time, your drawing a lot of power and not leaving much for the rest of the items. Turn the lights off, start the truck, and drive it to autozone to get your charging system checked.

If you don't do that, start it up, let it run, check the voltage from at your battery, and at your alternator, then return to us with some numbers. ("perfect voltage" doesn't necessarily mean correct voltage)

 

[bronco1]

I'm thinking a bad ground,possibly ground location G100-left front on the the radiator support(the left headlight and part of the computer system use this as a common ground)and ground location G101-right fender at the front near the battery(the right headlight and other parts of the computer system use this as a common ground).Make sure that the grounds at these locations are clean and tight.

 

[DrFeelGood]

I saw behavior like this before. It was the result of mounting a floor pedestal(sp) for a CB/Cellphone. The guy had run a screw through a wiring harness and shorted some of the wires to the frame. :doh0715:

It was like the car was haunted.:shocked

Have you ran any screws through your carpet?