Asked by Mesha Nov 08, 2018 at 09:46 AM about the 2010 Ford Crown Victoria Police Interceptor

Question type: Maintenance & Repair

Headlights come on but the left on is dim. Bright
light mode the left side goes completely out. Also
my backup lights aren't coming on anymore.

5 Answers


It might be a wiring problem but most likely it's a bulb burning out soon, noting the high beam is already out. As a test, you can swap the bulbs from left to right but the smart thing to do is go to an auto parts store and purchase one #9007 bulb and ask if they would install it for you. If you upgrade to a better bulb, you should do both sides so they match. Buying in pairs is less expensive than one at a time. Ask them about backup lights. Both out at the same time might mean a fuse or wire, not likely both bulbs burned out at the same time. Being a police car, check for bullet holes too.


I've replaced both bulbs even brought the highest beam bulb there was and it's doing the same thing. Where exactly is the headlight grounded to the car do you know?


I'm big on checking voltage and ground circuits. Use a test light.


The top wires at headlamp is voltage, hi beam, lo beam, the bottom wire you can't see is black, that is chassic ground. You can use a test light to check for voltage. In the diagram, the single wire on the left side of lcm/lighting control module, should be hot with headlamps on hi beam. If not I'd have to check dimmer switch. if it is hot, the wire at the bottom on right side, lcm, in diagram, should be hot. If it is, maybe problem with Lcm? There is that wig/wag component at top right of diagram, that could kill hi beams. For testing hi beam, left side, you could leave a pigtail at both ends, clip the wire, run a new wire, the new wire bypasses the wig/wag, to the pigtails at lcm and left hi wire at head lamp, see if left hi beam now works. There are possible trouble codes for lighting system. Check for applicable trouble codes. Around here some of the national brand auto stores will test po codes for free. I can only help with testing.


I miss-spoke. If the hi beam circuit from lcm isn't hot. The wig/wag does have concerned.

Your Answer:

Crown Victoria

Looking for a Used Crown Victoria in your area?

CarGurus has 351 nationwide Crown Victoria listings starting at $1,495.


Sell Your Car Yourself

With a simple, secure transaction.

2010 Ford Crown Victoria Police Interceptor

I have a different car

Ford Crown Victoria Experts

  • #1
    Tracy Hooks
  • #2
    Bob Beaman
  • #3
    G A Arne
View All

Find great deals from top-rated dealersTM


Related Models For Sale

Used Mercury Grand Marquis
4 Great Deals out of 540 listings starting at $1,500
Used Lincoln Town Car
8 Great Deals out of 762 listings starting at $1,900
Used Dodge Charger
137 Great Deals out of 16,971 listings starting at $2,495
Used Ford Mustang
144 Great Deals out of 19,247 listings starting at $1,500
Used Ford Taurus
124 Great Deals out of 6,261 listings starting at $2,100
Used Ford F-150
871 Great Deals out of 154,483 listings starting at $1,250
Used Chevrolet Impala
158 Great Deals out of 15,546 listings starting at $1,200
Used Ford Explorer
524 Great Deals out of 60,158 listings starting at $1,990
Used Toyota Camry
523 Great Deals out of 51,228 listings starting at $855
Used Honda Accord
460 Great Deals out of 46,138 listings starting at $1,595
Used Honda Civic
379 Great Deals out of 50,068 listings starting at $780
Used Dodge Challenger
38 Great Deals out of 11,421 listings starting at $5,700
Used Chevrolet Tahoe
174 Great Deals out of 19,450 listings starting at $1,950
Used Chevrolet Silverado 1500
428 Great Deals out of 71,245 listings starting at $1,995

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. Content will be removed if CarGurus becomes aware that it violates our policies.