Tcpchili Posted September 10, 2013 Share Posted September 10, 2013 My 95 Mack CH 613 cruise control will disengage when I turn on the right turn signal and will not reset until I turn on the left turn signal. I know it has to be in the switch. I am just not sure where to look. Does anyone have any suggestions? Quote Link to comment https://www.bigmacktrucks.com/topic/32718-mack-cruise-control/ Share on other sites More sharing options...
Truckinjeff Posted September 11, 2013 Share Posted September 11, 2013 Are there any other noticable symptoms? Lights appearing dimmer than usual, lights appear to be on when they're not supposed to, flipping a switch causes unintended operation of something else? I've personally never seen anything like this before. I'd check ground connections in the cab and have a look behind the gauge cluster and center switch panel for any wiring or connectors that may look like its rubbed, burned, or corroded. Also try looking at the exterior lights while alternating them between the left and right turn signal to see if there's any abnormal operation. Is this a VMAC II system? Quote Jeff - The Bulldog Doctor Master Technician Link to comment https://www.bigmacktrucks.com/topic/32718-mack-cruise-control/#findComment-205311 Share on other sites More sharing options...
bbigrig Posted September 11, 2013 Share Posted September 11, 2013 Is it disengaging the cruise when you use the left signal because your signal is back feeding to your brake light circuit somewhere??? It could cross over in a few places( signals to brake light circuit) just an idea... Quote Link to comment https://www.bigmacktrucks.com/topic/32718-mack-cruise-control/#findComment-205326 Share on other sites More sharing options...
Tcpchili Posted September 11, 2013 Author Share Posted September 11, 2013 Thank you for all the input. I'm not sure if it is a VMAC II system. How do you tell? As far as the left turn signal, no it does not disengage when the left turn signal is used. It will randomly disengage while going down the road and every time you use the right turn signal. Quote Link to comment https://www.bigmacktrucks.com/topic/32718-mack-cruise-control/#findComment-205381 Share on other sites More sharing options...
staxx Posted September 11, 2013 Share Posted September 11, 2013 Check the taillites have seen this a lot a 1156 bulb in a 1157 hole will cross over brakes and turn signals which will cause cruise to disengage also check bulb socket holder make sure the wires are not burned and crossing each other. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/32718-mack-cruise-control/#findComment-205395 Share on other sites More sharing options...
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