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I am up in Alaska, I been having trouble with my truck CTIS system draining all the tyres after shutdown. I did some troubleshooting and all the wheel valves stay open, after the CTIS ecu does a pressure check. I can go through and manually close them and they stay closed. My CTIS works well...

Did you check what code? I don’t think the solenoid is monitored by the TCU, the only thing that I would think is the output speed sensor would fault when disconnected.

Ron, are you running eco hubs? Do you think the higher torque to the C7 clutch pack is causing them to slip? There is no indication or monitoring of the C7 clutch pressures.

check line #429 grid F4, looks like space 11 for going to contact 87 of the engine PTO Relay

thanks for the info, I installed my cruise control and wired in the service brake discrete to the ECM, I was noticing that the pacbrake would not work while cruise control switch is on but speed is not set. I will have to go in and find those setting to change it.

I find that troubleshooting CTIS is very hard without using a data reader, you can try to use blink codes but the best is to use a data reader. I had to use a prolink with a road ranger TMS cartridge. You can tell the ECU to inflate and deflate to find leaks. this was my error code with 5...

The valve for mode is in the transfer case. looks like it should be pins B and A on the transfer case connector.

Is this a new problem? Or has the truck always done this? torque converter lock is 3 and higher. I think your C4 clutch is for range 3 and 7, C1 is for range 2,3,4,5. If you are concerned about clutch slipping, check the clutch pressures, and do a stalls test for the C1 and C4. If your clutch...

The way you described the air inlet heater, it sounds like normal operation. On my truck the grid heater cycles on ignition on, once the grid heater finishes the cycle I run the starter, after start, the engine ECM will cycle the grid heater, when that happens my voltage will drop down to...

Can you put into mode and check that range and select 1st gear. My guess are low pressure to your clutches caused by fluid restrictions. Allison recommends preheat for 15w-40 at 5deg F. You could also have a brake that are releasing slowly because of ice.

I have the same system, it works well for me, still need to calibrate the Birds Eye view. I spliced all the trigger wires to the lights so it moves to the camera position. It really helps to reduce the blind spots. I was trying to find a display that has a power over HDMI that is better quality.

I have been thinking for several years to pursue the idea of installing ATC for my 1078A1, looking at the wiring diagrams and configuration it may be possible. Anyone that has experience in driving trucks with ATC please let me know if it is worth it. This is a good video overview, skip to the...

Just take the transmission ECU, it takes about 15 min to remove it on a WTEC III system. Viper remote start systems have an interlock system that if the system is set to lock it won’t allow a start until it is unlocked via the key fob. If a start is attempted without unlocking it will run an...

I used that manual to reset my ABS ECU, for some reason my ECU was looking for an ATC valve and would disable ABS due to a ATC fault, I could only reset it by temporally wiring in an ABS switch.

It seems like driving with the 2:1 reductions hubs is like flying with your flaps down, it provides some lift benefits but it produces a lot of drag. Once it is cleaned up the airplane becomes faster but more slippery and is harder to slow down. The pac brake is less effective because the...

My hubs leak as-well, mostly from the caps, I parked on a side hill then took off the caps and put RTV to seal them better. It would be nice to know what the WTEC III CIN default shifts are set to and what limits are the adaption are. I Just fixed my PAC brake, it was not to hard, I had to...

Yeah, it can pretty much communicate with every ECU on the A1 3126 varriant. With a prolink 9000 and applicable cartridge You will need a: prolink 9000 J38500-1 MPC J-38500-1500C For ABS ecu: Rockwell wabco abs/atc cartridge Can read codes and see outputs and do test For engine ECU: v1.11...

I never used a lab top but I use a prolink with a wabco cartridge.

I did that, I had to do a lot of measuring and moving the floor in and out. Even after it was done it still did not match up well. I ended up using all thread and plywood to hold the camper down, eventually I want to put in a steel plate mount with a spring in the middle to allow some movement.

I noticed before I changed to eco hubs, my truck would get up to temp pretty fast less than 5 min of driving at highway. Now my truck has a harder time getting up to 200 deg. I wonder if the heat production is from the transmission having to spool at such a high rpm. It would be nice to see a...