The module is located in the ducting for the heater and is accessed from the passenger area of the front seat. I think it is just under the dash but you may have to remove the glove box. it is a rectangular item held in with four screws. and should have two connectors going to it. You have to be sure to get the right replacement however I have used one from a Buick and since the plugs were the same I made it work by modifying the mounting.
Should under dash on firwall near blower motor.
Look under the hood,passenger side at the firewall, you will see the blower motor,directly to the right going towards the drivers side ,you will see the blower control module, then the little small relay will be the next part over.
A 1983 isn't going to have a control module - it's all in the resistors in the stalk switch.
Most likely your blower control module is going bad. It's located under the glove compartment pass side toward the firewall.
It's called the EEC (Electronic Engine Control Module) or the PCM (Powertrain Control Module) It is located under the instrument panel on the floor tunnel ahead of the floor console. It has a ton of wires going into it.
The ECM (engine control module ) is located on the center of the firewall just above the motor. It's the thing that has a lot of wires going to it.
there is a control module behind the glove box next to the blower motor. It is square in size and has 2 connectors going into it. Disconnect them and unbolt it from the bracket holding it and clean the connectors with some alcohol and q tips and plug it back up and it should work. That's what i did and now it works every time.
Sounds like your electronic control module is going bad
check the hvac fuse first if that is ok check the thermistatic control switch make sure you have power going to the blower motor if there is power the blower motor is bad
The blower motor control unit is located on the back of the blower motor. 1. Check fuse. 2. Turn on heat and check for voltage at blower motor. Found voltage replace blower. 3. Check for supply power from the fuse on the red wire going to the blower control unit. 4. Check for a good ground on the black wire on the control unit. 5. Check for control power on the yellow wire from the climate control unit. When you select a fan speed (or the unit selects a speed in auto mode) a voltage that ranges from .4 - 9 volts is sent down the yellow wire to the blower motor control unit. 6. If all these checks are good than change the blower motor control unit. Hope this helps.
There are a few problems for your symptom. One problem that happens to the Automatic Zone Control (AZC) systems is the blower motor connector that connects to the control module, it overheats. Mopar has a connector harness repair for this problem. The blower motor resistor and the blower motor controller are a couple more problems that could occur. Of course it could be the blow motor itself, along with many more things. If you are going to do the repair yourself, you should start by purchasing a repair manual and following the blow motor diagnosing procedure.
You could have an ingnition control module going bad. Is it dying going down the road? If so, it more than like is the control module. If not, you could have a starter going bad, when it gets hot it won't work anymore. Good Luck!!