blue
red
one black,and one green
If your attempting to install a DVD player (in dash) in your car and need to bypass the brake light wire in order to be able to play it while driving its not too difficult. the brake light wire goes hot when the brake is applyied (to power the brake light itself) the DVD player uses this wire to know when the brake light is on or off based on if the wire is "hot" or not. simply splice the wire into a constant power source like the main power wire to your in dash unit.
Yes you can wire just about any light (neon, led, incandesant, etc... )to your brake light , granted it/s within the law. You plice into the brake wire, it's that simple.
Should be HOT at one side of the brake light switch
Yes I actually did it yesterday on my land rover I could not get my tail light to come on only my brake light. Use a decent wire like one side of a good speaker wire will do it's what I used. Tie it into the "hot" or positive wire of a working light into the positive of the non working. Make sure the lights you are tieing together do the same job i.e. Q brake light to a brake light. If that doesn't work check your ground. Also this only helps if the wiring is bad that is sending the light the signal if the fixture is bad you will have to replace it.
www.the12volt.com
New bulb needed or broken wire
At the right rear light the brake light wire is white. There is a manufacturer installed connector for a trailer lighting kit use located about 12 inches ahead of the left rear tail light behind the plastic panel holding the accessories options. The connector holds an orange wire for continuous power. It also has the white wire for brake lights. It has the dark green for right signal lights, yellow for left signal. At the right rear signal light assembly there is more than one dark green wire.
There may be a cut in the wire(s). You will need a Digital Volt Meter to test the wire(s) at your brake light. There is a switch that is actuated when you apply pressure to the brake pedal. If the switch is malfunctioning your lights won't come on.
looking for help on the brake light ground wire location for 1999 gmc suburban 4x4
Use a test light One wire (hot) will illuminate The other wire (cold) goes to the brake lights will not illuminate