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If i turn the head lights on my truck anti theft comes on and the truck won't start,
1999 Ford Expedition

If I turn the head lights on my truck anti theft comes on and the truck won't start,

(1999 Ford Expedition)
If I turn the head lights on with the truck running it dies,
What seems to make the problem better or worse? Turning the headlights off
How long have you had this problem? Just started
Tags: ford, expedition
1 answer & 1 comment
Popular Answer
on June 30, 2019

Have ALTERNATOR VOLTAGE OUTPUT tested.
Sign in to reply
on June 30, 2019

That is a good place to start .. Keep in mind there are more possibilities that can cause this concern.

*Hands-on* testing will be required.

Good luck!
General Diagnosis
$88 - $111 Learn More
on June 30, 2019

Have ALTERNATOR VOLTAGE OUTPUT tested.
Sign in to reply
on June 30, 2019

That is a good place to start .. Keep in mind there are more possibilities that can cause this concern.

*Hands-on* testing will be required.

Good luck!

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