Join Date: Sep 2011
Thanked 258 Times in 197 Posts
You need to get a "test light" and follow the wire down from the plug until you find power. There could be a broken wire, bad connection, or faulty connector.
A test light has a sharp point that will penetrate the insulation on the wire and light up when there is power. Make sure the ignition is in the ON position and the clip on the test light has a good ground.