Wiring the ambient temperature sensor.

Now we still have 2 wires that are not connected yet. That is pin 9-10 on the overhead console connector. These have to go to the ambient temp sensor. If you do not have the climate control (ATC) then you have to run 2 wires through the firewall to behind the grill, which is where you connect the wires to the ambient temperature sensor. I went to the junkyard to get the connector and then bought a new temperature sensor. I guided the wires from the middle of the ceiling down the right A-pillar to the passenger kick panel. From there I guided them all the way to the driver side where I made a hole in one of the grommets through the firewall and finally guided them to behind the grill where I soldered it to the connector I picked up at the junkyard.

Now for if you have the ATC or climate control. The ATC should send the info via the HEVAC module over the CCD bus that is already connected via the black/green connector from the 100-way connector cluster. Your best bet is to leave the 2 wires on the overhead console disconnected at first and connect the 2 connectors on the overhead and see if it receives any temp information or whether it states OC. If the overhead console states OC (open connection), try to get the connector to plug into the red connector or just cut the connector off and solder it on. Here is a picture of this red connector:

Before you wire the overhead console to this connector, it would be smart to take a multi-meter and see if the resistance makes sense. It should be 336K ohms at -40 Fahrenheit and 2.488K ohms at 140 Fahrenheit, anywhere in between should be good.