Interior blower controle for a/c and heater only works on high

1998 JK jeep , ive posted these tests and the free FSM book here, 100s of time.s
search much?
its the heater blower. failing.
DOES IT BLOW ON HIGH?????????? this is #1 important.
and like all such blowers, it can fail for all these ways.
even a loose wire.
1: fuse blown, (always first, for the end of time)
2: controls bad.
3: blower bad.
4: wire to any of the above, bad. (not conducting or shorted)
all cars,. some newer cars a computer runs this but is #2




the book is free.
98jx
click (spoon fed) JK 96+
click wiring
click 8w2-1 index. then see heater. blower.
blower is page 8w42 in the real fsm
what does it show.?
JB25 fuse not blown? (answring for fan dead no high)
Relay works>? tests, like all relays we test. sop
gas engine?
Fuse PDC6 not blown if diesel PDC 11
on HIGH the lever blower , on high grounds the motor blower
if the relay has power to blower 12v pin A ,dark green
then the blower motor is bad.
it only takes a $10 walfart meter to find cause.
12vdc across the blower pins on high is goal.

here is the free book, and is REAL not some PoS clone RAG.
http://www.morris4x4center.com/knowledge-base/index.htm?utm_source=cj#service

1998 ATC Jeep Grand Cherokee Blower Resistor connector ...

? 0:55
www.youtube.com/watch?v=sDFLuenx9aw
Nov 14, 2012 - Uploaded by Freedomautomotive1
1998 ATC Jeep Grand Cherokee Blower Resistor connector Repair Kit (RARE 1/2 Year) ... How to Fix a Chrysler Blower FanThat Only Works on High - Duration: 16:51. ... JEEP2001 FIXING THE HEATER BLOWER CONTROL. ... Jeep Grand CherokeeCenter and Lower Dash Removal - Auto Repair Series ...

You call it the blower motor, I assume you mean the interior Heater/AC blower motor. When the motor acts as you have described it is usually a problem in the motor itself like a short or rectifier.

likely your blower motor. but take connector off at blower, key on, htr on high. should have power at connector. check with a test light. If power is present, its your blower. If no power, and fuse is good, it's a wiring issue or your heater blower switch on the dash.

Check heater fuse.
If fuse good - could be a failure of the blower fan motor or blower control switch.
If fuse bad - bad blower fan motor could have blown the fuse.
DO: check fuse, then blower motor.
Pricing: new blower motor: Duralast PM270 $43.99
new heater control switch: Duralast SW229 $46.99 (without
A/C).
I'd expect your blower resistor to be good - when they fail, the blower only will work on HIGH setting.

Its not the switch or the controller in the instrument cluster. On my jeep there was a panel on the passenger side under the dash board. It helped me find it by turning on the heater and going toward the sound of the blower. On the backside of the panel was a series of little coils that control the different speeds. one of those coils had been broken.

you need a temp limited switch and for the most part its close to the blower motor has a small screw on each side with a plug in the middle give these websites a try www.autozone.com and www.alldatadiy.com if all fails stop by your Jeep dealership in the parts department and they be able to show you what i am talking about and print you off pictures and diagrams showing you where it is located wish you the best of luck Michigan Man.

If blower only works on high speed I would say blower motor resistor but if it does not work at all I would suspect blower motor. Make sure you are getting power to motor if not it might be blower motor switch.

In many cases this is the result of the blower motor resistor having gone bad. They are often located in the housing that holds the blower motor but I cannot say 100% for sure with the Jeep Cherokee.

It is a bad blower motor resistor and it is mounted on the bottom of the A/C heater housing on the passenger side of the vehicle under the glovebox area. Hope this helps. Please rate this a fixya if it helps. Thanks.

Mike