Just connect it to one of the brake lights hot lead, and ground it to the truck.
Bulb, wire, fuse, etc.
Probably a broken or shorted wire, or perhaps a faulty ground. I'd check the ground wire first before tracing the hot wire. Both brake lights should be on the same circuit, so, if the problem isn't in your ground, it'll be between the plug and the point where the brake light wires split off from each other.
most likely ground wire problem Bad bulbs?
I have a 2011 Dodge Ram With Camper Shell. The 3rd brake light will wok but it never goes completely out. The 3rd light remains on very dim. Check voltage with brake pedal NOT pressed and you have around 9 or 10 Volts remaining on thus connection point. Any idea why and how to wire the 3rd brake light on this vehicle./
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.
It isn't there, Dodge didn't wire the Dakota with one. You will have to wire the brake controller your self.
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.
blue
New bulb needed or broken wire
The switch probably turns the light out when the switch makes connection, then the light is on when there is no connection (like when the wire is not connected.) Reconnect the wire and push the switch to see if the light goes out. The switch is most likely out of adjustment or bad.