Heater blower motor not coming on

[dustyinthedirt]

I am working on a 89 SWB 4.0 5 speed.

I just converted to open cooling. but i do not believe the motor was coming on before this, because the heater switches were already pushed over to heat and def frost and nothing has been coming on. 

I have checked the fuses and replaced most of them. just for the knowledge of knowing they were all good. I only had a fuse checker and i when i stuck it to the back of the fuse that is labeled blower it lit up to say the fuse is getting power. 

I am not sure where to go to next and see if the blower is getting power. I got aggravated and walked away to search for problems on here. I am gonna go through my manuel and find out where the connections are. Any help is appreciated. 

[onlyinajeep726]

Check this out:

 

It's the blower motor resistor, and they are known to over heat, and go bad, or melt the hell out of the plug, and burn the wires, thus not working.
 

[dustyinthedirt]

Okay i will. Thank you..And where is located? 

[ParadiseMJ]

Under the passenger side dash...on the HVAC housing.

[Eagle]

Before you even mess with the resistor pack -- try the blower with the switch in the high speed position. That bypasses the resistor pack. If it runs on high but not on the other speeds, then check the resistor pack. If it doesn't run on high speed, probably the brushes are worn out in the blower motor and you need a new motor.

[cruiser54]

Check for power at the blower motor connector and for ground also. 

 

It's right there on a pigtail under the coolant bottle. 

[dustyinthedirt]

okay so i looked at the connection and it seems to "look" fine.

 

The heater does not come on in high as well. I will check the ground and the voltage tomorrow and update. Where is the best place to check the voltage at?

[dustyinthedirt]

Connector. I see that now.  :doh:

[dustyinthedirt]

Okay so after finally buying a volt meter i checked the connection to the blower motor itself. IT registered 11.8 volts with the heater controls on high. I turned it to off and go 0.0 volts. So i'm leaning toward the blower motor. i did not check the resistor pack because the heat was not coming on for any setting... 

[Eagle]

You have voltage but no blow. It's the blower motor, not the resistor pack.

[dustyinthedirt]

I can pull the just the blower out from below where the original pressure bottle is correct? 

[buckwheat]

I would recommend taking out the bolts/ nuts first, but yes.

[cruiser54]

I would recommend taking out the bolts/ nuts first, but yes.

What a stickler for details. LOL.

And yes, remove the blower motor.