Skip the auto shop - Our mechanics make house calls

Q: Brake light switch continuously fails

asked by on

My brake light switch has failed more than five times in the past few months. It always seems to fail when the car is parked in the driveway and it is raining but not every time it rains. There seems to be no apparent correlation between switch longevity and weather patterns. I hit a deer over a year ago and replaced the front clip myself but had no issue for about a year. I have been all over looking for shorted wires and have been unsuccessful. Help please!

My car has 136000 miles.
My car has an automatic transmission.

Hello. You may want to check the connections at the terminal as it is not uncommon for these to get very hot and melt the plastic inside and corrode. This may also be a rusty ground which can also cause the switch to short out when too much power is drawn. If you need some extra guidance by an expert, a certified professional from YourMechanic can come to your car’s location to diagnose your brake light problem and move forward with the appropriate 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!

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: Vehical cranks no start,replaced cam sensor

Hi there. If you're getting efficient flow of fuel on your Nissan Frontier and spark is not a problem; there are two things I'd check. First; would be the mass air flow sensor. Second, if you replaced the cam sensor...

Q: bearing shaft and balance shaft

Hi there. The recommendations to replace these parts may be a sales ploy to make some money from you since the dealer has to do this piston work under warranty for you. If you have an engine issue after they...

Q: Car accelerating weirdly.

If the red brake light is on, it usually means one of two things. Either you have a hydraulic leak in your brake system, or your emergency brake is on. The emergency brake being on even partially can cause your...

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...