ducktape11

Welp the truck is fixed..... I reinstalled the noise filter and it fixed the TCC lockup and the HVAC CCD issue. I also soldered the trans wire the DTT voltage regulator wire was tapped into... Both these wires were just wrapped together instead of properly soldered. Do I think the filter fixed it? No. It was that the wires were not properly put together. My guess is that the readings were getting skewed to the PCM and that was somehow messing with the CCD bus.

I was grounding the meter to the dash. Should I use OBD ground?

Battery terminals are new no corrosion. Grounds are all new or look good with good wiring. I measured the circuits from the data link pins 3 and 11. 2.460 and 2.420 is what I got with decreasing voltage of about 0.03 with headlights on/off

I cleared the code and same thing. The voltages are low on both circuits. Also voltage decreases on both circuits when turning on headlights

Any more thoughts on this?

I haven't cleared it since it sets Everytime I leave the blower on too long. Does it change with the code gone?

Both voltages were low 2.422 and 2.463 if I remember right

I still have the connectors just didn't have the terminals for inside. I can put it back together eventually

Ok thanks! Yea the no buss is an issue. Disconnecting the fuse, relay, or motor itself at the connector gives the no buss message. To me that means it's power I'm looking for and not ground. Somehow a CCD module is powered off that cable somewhere. But if I disconnect just the motor the circuit prior to the connector should still have power. That's where I don't understand what's going on. If something was tapped into that wire it should work with a disconnection past the tap. The blower motor connector should only be power to and ground from the motor (for high speed only). I cut the connector for the blower motor out and soldered the wires together due to corrosion in the connector and that changed nothing.

Yes that is correct fuse 2. Yea looking at the diagrams I finally was able to put the 2 together. Very weird they would be on the same fuse. I figured a blower motor on high and heated mirrors would be over 10a draw.

I turned the truck on and waited 3min. Should it not be running? Should I wait longer?

Measured from the OBD port pins 3 and 11 2.422v 2.463v Turning the blower on doesn't change voltage much. Maybe 0.05v at most

I cleaned up g100 and the left kick panel ground with no changes. All I have to go on right now is something in the CCD bus is powered off of the blower circuit somehow.

I'll double check that ground since a lot goes through there. Kinda stuck again now though. From the looks of it the blower fuse, relay, and motor are always energized and the HVAC controls module grounds it to make it operate. I'm not sure where to look if unplugging the motor power at the motor causes a no buss message...

Do you know exactly where that left kick panel ground for the HVAC is? All the wires down there make general area finds difficult