ozburn Report post Posted August 3, 2011 I have a 2004 Workhorse chassis and tow a 2008 Honda CRV. Recently, cruise works fine without CRV connected. With CRV connected, cruise works fine if RV lights and turn signal are OFF. Any time I turn any RV external lights ON, cruise disengages. Is this a diode, ground or short problem? Thanks Don Share this post Link to post Share on other sites
wolfe10 Report post Posted August 3, 2011 First suspect is that running light positive 12 VDC is feeding back into the coach brake circuit. That could be from a bad diode allowing voltage to cross over. That could also be from a bad ground which can cause some very strange ground paths which might include that brake light circuit. Brett Share this post Link to post Share on other sites
