Last post on May 23, 2013 at 8:57 AM
You are in the Jeep Cherokee and Jeep Grand Cherokee
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Jeep Grand Cherokee, Heating / Cooling, SUV
#373 of 511 blower motor resistor
Dec 20, 2009 (11:52 am)
Is there a way to check a blower motor resistor on a 1997 jeep grand cherokee? I have checked the switch in dash, blower motor works when you hook up a ground wire and there seems to be power to resistor ( but it is below 12 volts) everyone thinks it's the resistor , but no one is for sure. The part costs about $70.00 and hate to buy it if that is not the problem. Before the fan stopped working completely sometimes it would not come on right away, it would come on after a few minutes. Any ideas? thanks
Dec 22, 2009 (8:42 am)
That's weird i have the same problem with my 97 Cherokee. I wish I had an answer for you but I don't,sorry. What I did for right now is I hooked up a on off toggle switch to the ground side of the blower motor. I know that it's not the proper way to repair the problem but i need to get back and forth to work. Hopefully someone can help us out with this problem.
#375 of 511 No Heat after replacing heater core
Dec 22, 2009 (2:34 pm)
I had my AC replaced in 2000 Jeep Grand Cher. While the dash was apart, had heater core replaced. I now have not heat. Heat worked fine before core was replaced. Any ideas?
#376 of 511 Re: No Heat after replacing heater core [mark243]
Dec 22, 2009 (7:28 pm)
First thing check your fuses, second check the connector to your blower motor. (real easy to forget to connect) third check the connector to your blower motor resistor. My big question is did you do the work or did you pay for it?
#377 of 511 Re: No Heat after replacing heater core [tom5571]
Dec 23, 2009 (8:16 am)
I paid to have it completed and have taken it back twice. I get the impression they don't want to spend the time to troubleshoot and have to pull the dash apart again. Good heat from hoses just very little inside - luke warm at best.
#378 of 511 Re: No Heat after replacing heater core [mark243]
Dec 23, 2009 (1:34 pm)
If the blower runs then there is a good chance they didn't get the blend doors hooked up right. Yea pulling the dash apart is no fun but you can skip a few steps in the manual and get the same results. Since you paid for the job and are not satisfied and the system doesn't work properly the shop should be held accountable, DOG EM OUT
#379 of 511 Re: No Heat after replacing heater core [mark243]
Dec 24, 2009 (5:58 am)
Before dogging the repair guy.
You should have an idea of what is wrong with your system.
It might not be the repair guy’s fault.
Coincidence does happen!
It could be a faulty actuator motor, etc.
If you have the dual control heating system, then the first thing you should do is read your fault codes.
You can also check a few problems manually.
The fault code system is an excellent place to start the diagnosing process.
IF you have the Automatic Zone Control system (AZC)
The first thing you should do is check the AZC fault codes.
To read the fault codes:
1. Turn on the ignition switch.
2. Turn on the AZC system. The temperature settings should be displayed for both sides.
3. Simultaneously hold down the AC and the Re-Circ buttons.
4. Then turn the driver’s side temperature (Left) control knob to the right (CW) one click.
5. Then release the AC and Re-Circ buttons.
If there are no fault codes, the “00” display value will remain in the window.
If there are any codes, each will be displayed for one second in ascending numerical sequence. Once all codes have been displayed, the system will repeat the fault code numbers. This will continue until stop the process by moving the left side set temperature control one click in either direction, by pressing both the A/C and Recirc buttons at the same time, or the ignition is turned off.
Record all of the fault codes and also describe any symptoms you are having with your heating system.
Like - Are you getting a good air flow thru your vent outlets?
Can you direct the air flow to the different outlet vents?
Post your fault codes and symptoms.
I’ll interpret them for you and advise you on what I think the problem is.
#380 of 511 Re: No Heat after replacing heater core [blendor]
Dec 24, 2009 (3:59 pm)
Thanks for the offer but it does not have a dual control system. The mechanic who put in the heater core can't find a problem and said he may not be able to ever get acceptable heat back. I just don't feel comfortable with his ability after saying that knowing it worked fine before he took the dash apart.
The center vents seem to blow a normal amount of air but the side vents are very weak.
#382 of 511 Re: No Heat after replacing heater core [blendor]
Jan 01, 2010 (5:16 pm)
Thanks for the info- I did this and had error codes 54 and 56. Any idea what that means?