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.
68,405

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.
6,575

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.
19,310

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

Add photo

Related Questions

F-150

Looking for a Used F-150 in your area?

CarGurus has 195,014 nationwide F-150 listings starting at $290.

ZIP:

Search Ford F-150 Questions

Ford F-150 Experts

#1 OJ
OJ
Reputation 8,480
#2 dandyoun
dandyoun
Reputation 4,420
#3 tennisshoes
tennisshoes
Reputation 2,940
View All

Related Models For Sale

Used Chevrolet Silverado 1500
1,905 Great Deals out of 182,391 listings starting at $1,595
Used GMC Sierra 1500
778 Great Deals out of 68,591 listings starting at $1,800
Used Dodge Ram 1500
391 Great Deals out of 10,845 listings starting at $1,000
Used Ford F-250 Super Duty
319 Great Deals out of 44,658 listings starting at $1,450
Used Toyota Tundra
459 Great Deals out of 34,667 listings starting at $2,500
Used Toyota Tacoma
521 Great Deals out of 43,045 listings starting at $1,995
Used Ford Mustang
687 Great Deals out of 44,975 listings starting at $750
Used Nissan Titan
165 Great Deals out of 18,975 listings starting at $3,000
Used Chevrolet Colorado
242 Great Deals out of 27,197 listings starting at $1,000
Used Chevrolet Tahoe
579 Great Deals out of 32,759 listings starting at $1,500
Used Ford Explorer
900 Great Deals out of 65,295 listings starting at $799
Used Ford Ranger
172 Great Deals out of 5,628 listings starting at $1,200
Used Ford F-350 Super Duty
357 Great Deals out of 24,373 listings starting at $2,588

Used Cars For Sale

2018 Ford F-150 For Sale
700 listings starting at $29,070
2017 Ford F-150 For Sale
57 Great Deals out of 125,703 listings starting at $18,199
2016 Ford F-150 For Sale
106 Great Deals out of 9,636 listings starting at $16,990
2015 Ford F-150 For Sale
222 Great Deals out of 8,745 listings starting at $15,990
2014 Ford F-150 For Sale
350 Great Deals out of 12,449 listings starting at $9,900

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.