On my 2003 Dodge Ram 1500 W/5.7L, brake lights stay on when ignition is switched to run without the brakes applied and my cruise control does not work. When the ignition is turned off, the brake lights work as they are supposed to. The third brake light works as it is supposed to all the time no matter the switch position. This will happen for a day or two then everything will go back to working for a day or two like it is supposed to then it will mess up again. I replaced the brake switch thinking that may fix it and saw no difference. I have the “Complete” service manual for my truck and noticed there are three circuits in the brake switch and tested the #4 contact on the brake switch and found no power supply on that wire, I have found this is the Speed Control Supply/Brake Switch No. 2 Signal. It is circuit V32 in the brake switch Pin# 4 “V32 20YL/RD SPEED CONTROL SUPPLY/V32 20YL/RD (5.7L) BRAKE SWITCH NO. 2 SIGNAL”. The lights started working again for a day and I probed the #4 wire and had power, plugged the connector back into the brake switch and “Boom’ no power and brakes came back on with the ignition switch on and the cruise stopped working again. I have jiggled wires around and don’t think I have a short or open… where can I check next to trace the problem back? I am thinking this problem is the PCM but I would like confirmation. If it is the PCM, does this have to go to the dealership to be programmed after install or can I just plug it in and go?
have the same problem?
Wednesday, March 30th, 2011 AT 7:26 PM