View Full Version : B1000 and U1500....
01Blackerado
March 16th, 2011, 04:05 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, 07:03 AM
Those indicate that there is a loss of communication with other modules on the serial bus.
01Blackerado
March 16th, 2011, 07:20 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...
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