Hey Guys, I have been following the different CTIS threads and I think this one is the closest to my problem. Driving back home on a 220 mile trip, my CTIS system started acting up at my fuel stop 60 miles from home. I was in the Truck stop parking lot when it happened. The Hwy light was blinking like normal, but then there was a loud squealing noise. IT lasted about 20 seconds. If I shut down the truck, it stopped immediately. It did it again two more time with about 20 seconds between events. Then the noise stopped and I had 5 blinking lights. I had good air pressure, tires were fully inflated and brakes worked well. I should have shutdown and disconnected the CTIS before heading home, but I did not have access to my laptop and the TM's. The unit flashed 5 lights the remaining 60 miles. I made it home ok. Later I drained the tanks and let the truck cool down, I went back started the truck. Air Pressure built up properly, brakes worked, but this time no flashing lights or any lights on the unit (Yes my headlights were on).
Jump ahead to the next day. Truck starts fine, air pressure builds properly, brakes work fine, all the tires are fully inflated but still no lights on the CTIS unit. I shut down, disconnect the CTIS, restart, shutdown, then reconnect the CTIS and start up - still nothing. No lights or anything.
I will say that I was transporting the truck back after swapping out the batteries. One of the connections came loose while I was driving and caused some arcing and a little smoke in the batter box, but that was quickly resolved. Not sure if that could have cause the problem. I was driving mainly 55MPH, but occasionally hit 60 due to highway traffic and trying not to get run down. I don't think that could be the issue.
I would agree about the bad hub seal, but the sound has stopped - if the CTIS is not working, does the CTIS stop sending air to the system, only trying to determine why the sound stopped. So far the tires have all remained inflated, but I will check their status again.
Any advice or thoughts? Also I can't find the Spicer/dana trouble shooting guide. can somebody post a link?
Thinking about just eliminating the whole CTIS system if I can fix it. I have looked at the threads on that too. The CTIS system is awesome while it is working.
Thanks and good night