1996 Jeep Laredo heating

First, you need to check if the blower motor is getting power. If it is, replace the motor. If not, work backwards to find where power is lost, resister, relay, switch.

Let me know what you find.

As far as the PIN number, you need the serial number from the radio and model number. Give that to a dealer and they will be able to get the pin. You will need to remove the radio to get the info.

Joe