Electrical issue and cannot shift into drive when the lights are turned on

TOMMYP508

MEMBER
2004 FORD F-150
4.8L
V8
2WD
AUTOMATIC
140,000 MILES

Recently I got into my truck and turned it on. Turn on the lights, and it got dim and I could not move the shifter into Drive. I turn off the lights and I am able to shift to drive. When I turn on my ac switch to high the high, the high beams comes on. I need help, any suggestions? I am not a mechanic so any adice I would appreciate it.
Thanks, Tom

2 Replies

CJ MEDEVAC

MECHANIC
11,004 POSTS

Remove the battery and have it checked at a popular auto parts store.

Charge/ replace it if needed.

Immediately return to the auto parts store to have the alternator tested on the vehicle.

This is usually a free service at the auto store.

Return with the results!

The Medic

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Sunday, October 9th, 2016 AT 11:03 AM

KEN L

MASTER CERTIFIED MECHANIC
47,256 POSTS

Hey tommy,

CJ is right is sounds like the battery is dead not activating the shift lock solenoid, here are a couple of guides that will help

https://www.2carpros.com/articles/car-battery-dead-overnight

and

https://www.2carpros.com/articles/how-to-check-a-car-alternator

Please let us know what you find so it will help others.

Best, Ken

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Monday, October 10th, 2016 AT 1:31 PM