B1000 and U1500.... [Archive]

01Blackerado

March 16th, 2011, 05:05 AM

Anyone ever see these codes before? My nelson harness fried and i got these DTC's on the pcm. Now my signal from 42blue and 33red have a constant ground. The fans turn on as soon as the key is on instead of waiting for on temps

joecar

March 16th, 2011, 08:03 AM

Those indicate that there is a loss of communication with other modules on the serial bus.

01Blackerado

March 16th, 2011, 08:20 AM

Any idea how to fix it? Or do you know of a wiring diagram i can look for that will give me an idea. I just know its going to have something to do with HVAC control because my 42blue and 33 red on my 01 silvy are constantly grounded when the key is on...