Search results

What was the issue? You said you were only getting 90psi air supply. I thought that was what you were working on fixing. Then once you had a good 125psi air supply you would start working on the ctis.

You should only have to turn the governor screw 1/4 turn. May be the compressor unloader needs to be rebuilt or there is an issue with the governor. I would lean towards the air compressor though.

I have seen cartridges get clogged up and restrict air flow. With the new cartridge installed you want to run the pressure up and drain the tanks a bunch of times. Cycle the brake pedal a bunch. Really try to get as much moisture out of the system.

Usually one waits till they have the replacement filter in hand before removing the old one.

4 bolts hold the cover on the cartridge is held in place by the pressure of the cover over the base. Search haldex purest cartridge replacement. Very common air dryer used on tons of civilian applications in addition to military.

4 bolts on the metal top cover. Cartridge under the cover. New o ring included with the new cartridge. Takes a few min to do. Get a new cartridge not one that’s been sitting on a shelf for years. I do mine every 2 years.

The air dryer is due for service. At least replace the cartridge. The air compressor unloader is a common fault. The lube in there hardens up from sitting over time in the hot sun. A rebuild kit is available and you don’t have to remove the compressor to do it.

Did you service the air dryer yet? If thats gunked and/or you are getting moisture past it nothing will work right.

Air pump? The compressor?

Unfortunately that is not the cable. The first gen trucks do not have a data bus so to access the ctis there is a Y cable that plug in, between the ctis harness and computer. With a 3rd connector that creates a port for access. Those plugs are not the same as the ctis harness. Were you able to...

In theory yes. If you have a controller that supports diagnostics. And the Y cable to allow for diagnostic access. Good luck with that they are rumored to exist but I have never even been able to get a part number for the Y cable.

Not sure. Dana offers a free download of the current stuff. Not sure if they have a legacy page. I would think upgrading to the newer usb style interface would work better. Most newer laptops dont have a serial port anymore.

Do you have the newer usb type dearborn interface? The newer dana software may not be able to find the older serial port style interface.

First gen trucks all you really need is a multimeter. No abs and the trans control can self diagnose from the keypad. First gen a1 you can do basic engine diag and abs with a hand reader or the msd if you have one. Very few fully operating msd's in civ hands. Trans control you can still pull...

The only people who are going to get it to work are ones with c7 trucks and a msd. It’s a hard to find combo.