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post #1 of 8 Old 09-08-2019, 03:27 PM Thread Starter
CBL
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2000 TJ Wrangler 
 
Join Date: Feb 2016
Location: Maplewood
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Blower Motor

Hi Everyone,

I know this topic has been discussed numerous times. In fact you've helped me out fixing this issue before. I really appreciate all the input.

Here's what I have going on. Please cut me some slack as I am going to list out the background information too.

I fixed my blower motor problem about a year ago. Was working fine up until about two months ago.

Two months ago....lost fan speed #3&4. Have been lazy and didn't fix it. Figured I would get to it before winter.

Two nights ago the fan completely died.

Here's what I have done, checked, etc.

Fan switch works (checked continuity).
Plug going into fan speed selector is good on all four speeds.
Resistor fine. Plug is slightly warped but haven't been able to use fan speed 3 or 4 for months so doubt this is my overarching problem.
Plug going into selector slightly warped - but again - haven't had fan speed 3 or 4 for months.
There is correct power to fan speed switch, selector, and resistor.
Fan is fine (and only about a year old). I jumped it directly to the battery and it runs.
Both fuses are good.
I get appropriate power to all plugs where I would expect it except at the fan. What am I missing?
Two of the plugs are slightly warped due to heat but nothing severe so I don't think a basic connection is it (at resistor and selector switch). Fan speed switch plug remains fine.

AHHHHHHHH. It's been making me say a lot of bad words so any advice is appreciated. I have gone back and looked at other threads and followed them to the letter in the hopes of finding what is wrong. What am I doing wrong.

Thanks!

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post #2 of 8 Old 09-08-2019, 04:47 PM
jtec
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2014 JK Wrangler 
 
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jeep have AC yes or no ?

When I see the price of OEM I think aftermarket.
When I see the quality of aftermarket I think OEM.
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post #3 of 8 Old 09-08-2019, 05:14 PM Thread Starter
CBL
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Join Date: Feb 2016
Location: Maplewood
Posts: 10
Yes - The AC kicks on and I get cold air. Most of my parts that I have installed are Mopar. Not all of them are though (e.g. blower motor resistor or fan).
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post #4 of 8 Old 09-08-2019, 06:22 PM
jtec
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more to question than being nosy the wiring is different -
Attached Files
File Type: pdf 2000 tjwrangler.pdf (165.8 KB, 11 views)

When I see the price of OEM I think aftermarket.
When I see the quality of aftermarket I think OEM.
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post #5 of 8 Old 09-09-2019, 06:10 AM Thread Starter
CBL
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Location: Maplewood
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Thanks for the diagram!
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post #6 of 8 Old 09-09-2019, 01:49 PM
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Quote:
Originally Posted by CBL View Post
Hi Everyone,

I know this topic has been discussed numerous times. In fact you've helped me out fixing this issue before. I really appreciate all the input.

Here's what I have going on. Please cut me some slack as I am going to list out the background information too.

I fixed my blower motor problem about a year ago. Was working fine up until about two months ago.

Two months ago....lost fan speed #3&4. Have been lazy and didn't fix it. Figured I would get to it before winter.

Two nights ago the fan completely died.

Here's what I have done, checked, etc.

Fan switch works (checked continuity).
Plug going into fan speed selector is good on all four speeds.
Resistor fine. Plug is slightly warped but haven't been able to use fan speed 3 or 4 for months so doubt this is my overarching problem.
Plug going into selector slightly warped - but again - haven't had fan speed 3 or 4 for months.
There is correct power to fan speed switch, selector, and resistor.
Fan is fine (and only about a year old). I jumped it directly to the battery and it runs.
Both fuses are good.
I get appropriate power to all plugs where I would expect it except at the fan. What am I missing?
Two of the plugs are slightly warped due to heat but nothing severe so I don't think a basic connection is it (at resistor and selector switch). Fan speed switch plug remains fine.

AHHHHHHHH. It's been making me say a lot of bad words so any advice is appreciated. I have gone back and looked at other threads and followed them to the letter in the hopes of finding what is wrong. What am I doing wrong.

Thanks!
Hi CBL,
We are sorry to hear about your concern with your blower motor. We know you are reaching out to your fellow forum members, but are you considering having your dealer address this? If you need any additional assistance from our end don't be afraid to reach out via private message!
Laura
Jeep Social Care Specialist
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post #7 of 8 Old 09-09-2019, 08:11 PM
Rubi4MyMrs
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I think you have 2 different problems.

1. Losing 3 & 4

2. Losing all speeds

For #1 If speed 4 is high & 3 is the next lower speed I’m pretty sure the fan speed switch is not good & you are not checking it correctly. You need continuity (using an ohm meter) between C-1 E & C-1 A for speed 4 (high) & continuity between C-1 E & C-1 B for speed 3 in the diagram posted above for the switch to be tested as good. If you do not have continuity for one or both speeds, the switch is bad. If you do have continuity, the “slightly warped connector” is probably that problem.

For #2 I’m pretty sure you are using a volt meter looking for “power” in the grounding side of the circuit & doing that along with a bad or open ground downstream (toward the actual grounding point) will give you erroneous & misleading results. * That circuit actually has no “correct power to fan speed switch, selector, and resistor”. All speed control is done through the ground side of the circuit, not the (12v) power side. The only 12v is directly from the relay to the motor. Losing all speeds with good fuses & relay which then give you 12v power to the fan motor almost always means you are losing the ground & most always at the 3 wire connector at the back of the mode selector switch. See C-3 B to C-3 C in the same diagram. When the mode switch is in positions 1-6 the dark green wire (from the speed switch) grounds to G-202.

Most of the time the 3 wire connector is melted losing contact with G-202. Otherwise the mode switch itself might be bad.

The exception would be if you have a bad connection at the motor which could also cause you to lose all speeds. The speed switch is still suspect causing speeds 3-4.

Here is a link to a complete troubleshooting procedure when you lose all speeds. That may also lead you to why no 3-4. If you get through it & get only 1-2 working you can then address the no 3-4 & the speed switch.

https://www.jeepforum.com/forum/f9/no.../#post28658233



* The reason using a volt meter is not recommended is if you are lacking a ground & hook a voltmeter to the circuit the meter itself becomes the path to ground & the meter registers that & it appears as if you have voltage present when, in fact, you don’t really.
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post #8 of 8 Old 09-11-2019, 02:28 PM Thread Starter
CBL
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2000 TJ Wrangler 
 
Join Date: Feb 2016
Location: Maplewood
Posts: 10
Rubi4MyMrs - You were 100% correct as to how I was testing/looking at things. I went back and looked at it the way you told me to. Everything now works. Dash is back together. My wife will be happy that she has heat for the coming winter!

Thank you for your help everyone!
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