Is there an underdash module for the climate control on a '91 Regency? I've tried everything to get my A/C to kick in and my AutoXray 6000 is not even showing that the A/C is being "requested" when I activate the AUTO AC on the dash. I have 2 controllers here in the garage, and have swapped them out with no luck....so I'm wondering where the wiring goes from the dash switches.