Question about 2004 Cadillac CTS
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Posted on Jan 02, 2017
SOURCE: 2004 Cadillac CTS break lights
Hello! There is a relay called the BAS relay (brake assist) that controls both the top brake light and the lower lights...Since the top light works the relay is doing its job...However, the relay output is connected to several White wires that carry the same voltage to all brake lights...One of those White wires (the one that carries voltage to the lower lights is open)...There is a Joint Connector located with the BAS relay in the Left rear fuse block...One White wire coming in from the relay contact and 3 White wires leaving...#1 to the top brake light...#2 left brake light and #3 right brake light...It would appear that the junction of #2 and #3 are open inside the Junction block...Not the easiest fault to find and fix...
If you have a multimeter I'll guide you through the process...Or you can take it to a wiring specialist...Wiring Junction blocks look like hair combs (multi-tooth metal combs that push into a connecter with several wires all the same color...In this instance WHITE WIRES...When someone depresses the brake pedal +12 volts must be on all three white wires...Send a comment...Guru...saailer
Posted on Dec 11, 2011
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