Skip the auto shop - Our mechanics make house calls

Q: Headlights going in and out.

asked by on

My headlights won't turn on consistently and tend to go out. In addition, my interior lights and car radio flash on and off when I hit bumps in the road.

Looking at the wiring diagrams for your vehicle, I see that both the radio and courtesy lamps (interior lights) share a common ground. It could be this ground it is not making good contact and gets disturbed when going over bumps. There is a technical service bulletin (TSB) #18-003-05 for the headlight issue which says the control module needs to be flashed. However, the vehicle would need to be inspected in person for a definitive answer. I suggest calling a professional, like one from YourMechanic.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: I already have spark plugs, do I need to buy the coil as well?

Hi, thanks for writing in. Unless a coil has failed, it usually will not need to be replaced when doing the plugs.

Q: Transmission replacement - 2006 Jeep Grand Cherokee

Hello - yes, you are correct. Both the 3.7l and 6.1l Jeeps utilize the W5A580 transmission. Should be a straightforward swap. Torque converter may be different however (RPM range engagement), check your transmission supplier for details.

Q: How do I play a USB device?

A USB device can be played through the sound system. To do so, locate the USB outlet connector, which is in the center console compartment, and plug the USB device directly into the outlet. Then, press the Auxiliary button.

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...