I have an issue that I have been unable to solve - any help appreciated.
2007 Suburban with Auto Air leveling - shocks were done, so they were replaced.
Also replaced the compressor assembly (rebuilt from Arnott) since it was pooched from bad shocks.
Installed everything, and it worked fine for months (until warranty was over
It stopped working, and tripped the common service autoride, ABS, and level control (or something like that) so I scanned and found "short to ground or open circuit on exhaust" - upon removal and disassembly of the exhaust valve on the compressor, I found a bad crimp from the rebuild - it was not connected. Soldered and shrinked all back together, installed, and the DIC messages went away - yay right? Wrong. No worky.
I can jump the relay up (red to light blue on the harness with relay removed) and the shocks inflate and hold pressure - and the exhaust valve seems to be working when I unload the weight. Just doesn't seem to kick on its own.
I connected it to a fairly sophisticated scanner and there are no codes whatsoever. Same scanner also show resistance from the level sensors and when I push on each corner of the truck, they change, so seem to be working. When I call (from the scanner) for exhaust or compressor on, there is nothing - like it doesn't see the signal at all. Wondering if there is another connector or control unit that I should be checking??
Any ideas what to try next? Any help appreciated.
2007 Suburban with Auto Air leveling - shocks were done, so they were replaced.
Also replaced the compressor assembly (rebuilt from Arnott) since it was pooched from bad shocks.
Installed everything, and it worked fine for months (until warranty was over
It stopped working, and tripped the common service autoride, ABS, and level control (or something like that) so I scanned and found "short to ground or open circuit on exhaust" - upon removal and disassembly of the exhaust valve on the compressor, I found a bad crimp from the rebuild - it was not connected. Soldered and shrinked all back together, installed, and the DIC messages went away - yay right? Wrong. No worky.
I can jump the relay up (red to light blue on the harness with relay removed) and the shocks inflate and hold pressure - and the exhaust valve seems to be working when I unload the weight. Just doesn't seem to kick on its own.
I connected it to a fairly sophisticated scanner and there are no codes whatsoever. Same scanner also show resistance from the level sensors and when I push on each corner of the truck, they change, so seem to be working. When I call (from the scanner) for exhaust or compressor on, there is nothing - like it doesn't see the signal at all. Wondering if there is another connector or control unit that I should be checking??
Any ideas what to try next? Any help appreciated.