Skip the auto shop - Our mechanics make house calls

Q: Electrical

asked by on

ok i turn the key to the on pos. and my rear taillights all 6 of them flash now if i press break pedal they stop if i press down on signal switch (left turn) just the drivers side flash as they are supossed to. right turn all flash. i just installed air bag suspention could the added amps needed be messing with my electrical system

A: When taillights are behaving inconsistently...

When taillights are behaving inconsistently like you described, it’s likely to be a problem with an electrical ground connection. When the taillights are not properly grounded, the electrical current finds another path, usually through other light bulbs. Since you just did some work on the car, check the area where you were working and look for a ground wire. Those wires tend to be a single wire with a loop on the end. In the process of working on the air bag suspension, it may have been left off when you installed a bolt somewhere. If you don’t find it where you were working, look in the trunk and around the taillights for a wire that is bolted to the body of the car. The surface where it bolts up has to be clean and rust free. Fixing the ground should make everything fall back into line. If you get stuck and can’t find the issue, YourMechanic offers a repair and diagnosis service preformed by a mobile, professional mechanic that will commute to your location to inspect your brake lights.

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: Brake light won't go off

Hello! The brake light staying on can stem from something as simple as low brake fluid. However, on your particular vehicle the brake light will commonly come on due to a fault in the ABS system controller module. The module...

Q: Back lights do not work

The fuses keep blowing out due to a higher than normal amperage draw on the lighting circuit. This is likely due to an electrical short. The wiring will need to be traced to identify where the short is taking place...

Q: Brake lights don't work after replacing brake pedal switch

I can personally understand how frustrating it can be to try to get your brake lights working properly, and it looks like you have already put in a lot of effort to have it fixed! Having the information about 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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.