Its Unlikely you can because the Wiring plugs on the back of the control unit will be different So Unfortunately no
About $600
near the fire wall where the heater hoses enter
In a 1997 Jeep Wrangler, the relay switch for the heater blower and motor is located behind the dash. It will be directly behind the HVAC knobs behind the dashboard.
cable
No, it is not required. You can remove it and splice the heater hoses together.
it could be a couple of things you could have a bad thermostat or a bad heater core
Error code 66 on a 1997 Jeep Cherokee means TCM to PCM failure. This code means that the transmission control model is not communicating with the powertrain control model.
A 1997 Wrangler doesn't have a BCM. (body control module) It does have a PCM (powertrain control module) which is behind the battery.
Check for a thermostat that is stuck open. Also can be a clogged heater core, or defective heater temperture control valve.
Common problem. The heater grid burns a hole and the only fix is to replace the element.
02 Sensor Heater Control Circuit Low (Bank 2 Sensor 1) Shorted condition detected in the oxygen sensor heater element control feedback sense circuit
the evaporator inside the heater box behind the dash most common