HVAC fault codes question.

[gregsmy]

Update on the door control problem. Did some research and testing and figured out there is a broken wire in the harness where the door hinges. With the door closed everything works but when it’s open it doesn’t work. Wiggle test confirms that I can make it work with the door open. So if the door is open with the truck running it loses connection with the BCM and sets the code. Now I have to get it apart and fixed.

 

[OR VietVet]

Update on the door control problem. Did some research and testing and figured out there is a broken wire in the harness where the door hinges. With the door closed everything works but when it’s open it doesn’t work. Wiggle test confirms that I can make it work with the door open. So if the door is open with the truck running it loses connection with the BCM and sets the code. Now I have to get it apart and fixed.

Not hard to access. The rubber boot disconnects at the jam area from a plastic collar. Pull off and pull back. If you need the boot off, you can pull it from either side or access where the harness goes thru the hole to under the dash and unplug the harnesses and feed back thru the hole and then pull the boot off for complete access.

 

[gregsmy]

Next update for the HVAC codes / problem. I got the new evap sensor and worked on installing it. Found a rubber plug that fit a 1-3/4" hole. So I used a holesaw and carefully opened up the evaporator case. Was able to pry the old sensor out. Next I made a loop with some string and cinched it around the connector up top. Was able to reach the topside just by removing the glovebox. After pushing the grommet and connector thru the hole I was able to fish the assembly out the hole I made. Move the string over to the new connector end so I could pull it back up and thru the top hole. After a fair bit of maneuvering I was able to get the sensor back into the evaporator. This seem to have solved the freezing up problem and the evap temperature now reads correctly.

Felt like my luck was good so I tore the door wiring apart in the hinge area. Found one wire that was basically broken in half and after wiggling it once it fell apart. Was able to repair that and get it back together without incidence. That solved the code for lost communication with door control and the problem of nothing working when the door was open.

 

[Rocket Man]

Next update for the HVAC codes / problem. I got the new evap sensor and worked on installing it. Found a rubber plug that fit a 1-3/4" hole. So I used a holesaw and carefully opened up the evaporator case. Was able to pry the old sensor out. Next I made a loop with some string and cinched it around the connector up top. Was able to reach the topside just by removing the glovebox. After pushing the grommet and connector thru the hole I was able to fish the assembly out the hole I made. Move the string over to the new connector end so I could pull it back up and thru the top hole. After a fair bit of maneuvering I was able to get the sensor back into the evaporator. This seem to have solved the freezing up problem and the evap temperature now reads correctly.

Felt like my luck was good so I tore the door wiring apart in the hinge area. Found one wire that was basically broken in half and after wiggling it once it fell apart. Was able to repair that and get it back together without incidence. That solved the code for lost communication with door control and the problem of nothing working when the door was open.

Nice work!