Skip the auto shop - Our mechanics make house calls

Q: Lights connected to the same fuse don't work

asked by on

My car has several lights on it that are supposed to work simultaneously but don't. Tail lights are the main ones. It is strange as all are connected to the same fuse, including dash lights, glove box light and licence plate light. I have recently replaced the signal lever and the fuse is working fine. Do you have any idea what the issue is?

Hello. This is typically a failure in the headlamp switch or a bad ground connection. However, the most common issue I have found with this is the switch. I would typically start by accessing the back of the switch by removing it from the dash and leaving it connected.

I would then use a voltage meter to verify that the switch is getting source voltage and then see if it goes to the circuit when turned on. If not, then the switch needs to be replaced. If you want to have this repaired, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose your lights issue and point out the proper repairs.

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!
  1. Home
  2. Questions
  3. Lights connected to the same fuse don't work

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: Where is the purge valve located on a Mazda 626

Hey there. On a 2000 Mazda 626 2.0L it is in the passenger side of engine compartment on the firewall. If it is a 2.5L, then it is under and near the brake master cylinder.

Q: I have some sqealing and groaning/grinding on driver side by the strut mounts. It happens when backing up left or right and when driving slow.

If the struts and mounts both look ok and passed the bounce test, you may be looking at a CV joint or bearing. Inspect these components and check for wear and any visible damages. There is also a possibility the...

Q: Headlights/Tailights/Turn Sights do not work

Hi there. It appears that you are not getting the right voltage to your lights. Most of the time this is caused by a failure in the multifunction switch. This is the switch that turns these off and on. I...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
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...