2006 Ford F 150 when the engine is running if I turn the headlamps on the engine cuts off

10

Asked by Dec 20, 2015 at 07:18 PM about the 2006 Ford F-150 XLT SuperCab Styleside

Question type: Maintenance & Repair

Ford f150 2006 model when the engine is running if I turn the headlamps on the engine will cut off what could be the problem

4 Answers

10

I think it could be the ballast but I don't know where to locate it could you help me get room

1 of 1 people found this helpful.
70,985

Sounds like a dying alternator. Once the engine is running it's the alternator that runs the ignition system, as well as the rest of the electronics on your truck. Theoretically the ignition system should run off the battery if the alternator quits. That's what the reserve capacity rating on your battery is. But, you never know. Have the alternator tested at your local auto parts store. Most will do it for free and they don't have to remove the alternator for the test. HTH. -Jim

1 of 1 people found this helpful.
6,705

If Jim is right the alternator is an easy fix and would kill the vehicle. The lighting system per ford's diagram isn't tied into anything related to the ignition system, however if you have an aftermarket alarm on the truck that is tied into the lights it could be an alternate cause. Those light switches can't handle any load that is added to them for very long.

1 of 1 people found this helpful.
20,470

First, do not begin throwing parts at the problem. What is happening is when power is applied to the headlights, the signal to the PCM, BCM, etc. is being scrambled. The cause could be as simple as a defective headlight switch, or a bad ground somewhere in the lighting circuit. It could also indicate a problem with the ignition switch (not the ignition cylinder). If you know your way around electricity, you can bypass the headlight switch by unplugging the connection to the switch and using a jumper to turn on the lights.

Your Answer

F-150

Looking for a Used F-150 in your area?

CarGurus has 197,074 nationwide F-150 listings starting at $1,300.

ZIP:

Ford F-150 Experts

  • #1
    OJ
    Reputation
    9,100
  • #2
    dandyoun
    Reputation
    4,580
  • #3
    tennisshoes
    Reputation
    3,140
View All

Related Models For Sale

Used Chevrolet Silverado 1500
2,273 Great Deals out of 169,086 listings starting at $1,000
Used GMC Sierra 1500
1,028 Great Deals out of 66,257 listings starting at $1,995
Used Ford F-250 Super Duty
328 Great Deals out of 45,598 listings starting at $1,700
Used Dodge Ram 1500
390 Great Deals out of 10,844 listings starting at $1,500
Used Toyota Tundra
467 Great Deals out of 33,600 listings starting at $2,000
Used Toyota Tacoma
601 Great Deals out of 44,633 listings starting at $1,790
Used Ford Mustang
612 Great Deals out of 36,332 listings starting at $899
Used Nissan Titan
212 Great Deals out of 20,682 listings starting at $3,390
Used Chevrolet Colorado
277 Great Deals out of 34,286 listings starting at $1,900
Used Ford F-350 Super Duty
330 Great Deals out of 25,302 listings starting at $2,488
Used Chevrolet Silverado 2500HD
329 Great Deals out of 30,482 listings starting at $3,500
Used Chevrolet Tahoe
734 Great Deals out of 41,543 listings starting at $1,995
Used Ford Explorer
932 Great Deals out of 68,721 listings starting at $1,800

Used Cars For Sale

2018 Ford F-150 For Sale
63,668 listings starting at $21,482
2017 Ford F-150 For Sale
122 Great Deals out of 60,053 listings starting at $14,369
2016 Ford F-150 For Sale
136 Great Deals out of 8,039 listings starting at $16,995
2015 Ford F-150 For Sale
376 Great Deals out of 11,622 listings starting at $15,591
2014 Ford F-150 For Sale
511 Great Deals out of 14,516 listings starting at $9,999

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.