Headlights turn off when ignition is turned on???
Please help! My headlights turn off when I turn on ignition. Only parking and fog lights work. Headlights work only when truck is turned off. I have replaced some parts hoping to correct problem. I have replaced the CTM as recommended by my local dealer with no results. Headlight switch and high beam/turn signal switch have also been replaced. Additional problem is the cruise control function will turn off and on by itself and set unexpectedly. I am thinking both of these issues are connected. I checked diagnostic codes on the odometer and came up with a PCU1693 and ECU0575. I have been researching this problem online for a while and have come up with nothing for the headlight issue. The cruise control issue has popped up online for other truck owners, but no one ever had the issue resolved through dealer solutions, such as cruise control switch, etc. One post pointed to the vehicle computer but didn't say if it solved the problem. Right now that seems like the most promising solution but I would love to hear from someone who has been through this. Any help would be appreciated. Thank you!
Last edited by JDS; 08-13-2013 at 04:54 PM.
Reason: add more