Skip the auto shop - Our mechanics make house calls

Q: I have a wire that isn't connected. It's yellow and brown and it comes from under the brake booster. Where does it go?

asked by on

The wire is yellow and I think brown. It appears to be stripped on yellow side and cut off on brown. It was wrapped around the. Master cylinder when I found it but. Not sure what it goes to or what it connects. I'm trying to fix this truck up for my son who just got license. His dad is gone and I have limited knowledge but a lot of tools. And a teenage boy willing to learn. Please help.

My car has 225245 miles.
My car has a manual transmission.

A: Hello. The wiring you have found could poss...

Hello. The wiring you have found could possibly be to a few different things. One possibility is that the wiring may be to the under hood light that some of these vehicles were equipped with. I would look for a bulb or socket, which should be mounted on the underside of the hood. If there is no light, or the light is functioning correctly then I would carefully look around the engine bay for any broken wiring or loose connectors. Unwrapping the wire and seeing how far it extends may help with finding what it goes to, perhaps a sensor or solenoid of some sort. If you're unable to fix the problem yourself, I would recommend having a professional technician, such as one from YourMechanic, visit your location to determine what the wiring may be to, and diagnose what exactly is causing the electrical issue.

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・Save up to 30%

Get a quote

What others are asking

Q: My truck turns over but will not start - 1989 Toyota Pickup

I would recommend starting by checking to see if the fuel is reaching the spark plugs. Try pulling one of the plugs out after cranking it over to see if the plug is wet with fuel. If they are not,...

Q: Grinding noise of the engine with P0340 code

Code P0340 is a camshaft sensor fault. The cam sensor is responsible not only for determining cam position, but it also is used by the engine computer for cylinder identification to set up both ignition firing sequence and sequential injection...

Q: Transmission leaking oil

The alternator on this vehicle is a common failure. Unlike most cars, it will be intermittent for a while before it fails. I would check the connections on the battery and the alternator first before replacing it. As for the...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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 to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...