Quote Originally Posted by sticks View Post
Jon, I had no red battery warning light show up on the dash when my OTR system shut down only during very low or idle speeds the last 2 or 3 hours of driving time. My primitive brain was wondering at this time whether voltage was crossing this compromised wire at higher speeds but not at idle speed. At any rate, once both wires definitely parted ways the red battery warning light came on and the OTR shut down permanently and I was " toast" for the remainder of the trip to Stuart, Fla.
To me that is the biggest potential drawback of the OTR system - if it goes down and you have to switch to cruiseair, no air for the driver up front. As Jerry pointed out, this would also be the case if the expansion valve on the drivers portion of the system crapped out as well. Still, nothing like OTR air for cooling the coach and driver when it is on.

Seems like it would make some sense the way Sticks thinks his is set up - eg, if the alternator craps out it sends a signal to the relay to shut down the OTR to preserve battery power?? That would at least stop battery draw before it learns of low voltage from the batteries or invertors after it has already happened?

Jon, would you think that OTR wiring is a convertor specific setup or Prevost since it deals with the chassis air? If Prevost, then all coaches should be wired the same I would think.

In any case, another one of those maintenance things it sound like worthwhile to add to the periodic checklist.