If your climate control is having lighting issues still and/or intermittent malfunctions:
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If the vehicle’s battery was not disconnected prior to the removal of the climate control, it may inadvertently blow a relay near the fuse box, or a fuse in one of the multiple fuse boxes in the vehicle.
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Often times there are communication issues present if the unit is installed back in the vehicle. One of the fastest and easiest ways to clear any soft codes in the vehicle is to do a simple battery reset:
1. Disconnect the battery cables
2. Clamp the cables together with the terminals touching (off the battery!)
3. Leave the cables maintained in this position for 30 mins. and then re-install with the negative cable first and then the positive cable.
HELPFUL TIP
Whenever doing a hard reset (global reset) always remove the ground cable first then the positive cable. When reinstalling a battery or just the cables install positive first then attach the ground. It's always best to do it this way so there are almost no issues causing an electrical spark on a module in the vehicle.
*This should clear any soft codes and communication issues with the vehicle’s PCI bus.*