Hello. I have a 2008 Volvo vnl780 with d16 motor and 13 speed tranny. I keep getting the reverse light short circuit message on the dash and the reverse light and alarm stop working. The problem comes and goes but has become more frequent now. I've replaced the reverse switch numerous times and have noticed that the reverse light always starts working immediately after a switch change but cuts out later on in the day. Any idea what the solution could be?