A/C & Heater Blower Not Working

[Bloomer]

I have a 1995 FZJ80. Blower for A/C and heater is not working (or at best working intermittently). From searching the forum, it appears the blower relay and resistor seem to be the culprit most of the time. Replaced both relay and resistor last night. Blower still not working. Anyone have suggestion or thought on what else may be causing the blower to not work, and how to fix?

Thanks!!

 

[Bloomer]

Help.....It will be getting hot soon

I know this is not the most interesting question, but it is going to be getting hot here in South Texas soon......

Anyone have an idea on what causes the A/C and heater blower to stop working. It worked intermittently for a few times, then just stopped. As previously mentioned, I have replaced the resistor and relay, which appears to be the issue others have had.

Apparently, that is not the problem I am having....Help!

 

[kidglove13]

I do not know about the 95 but there is also a relay up in the dash above the blower unit.
WAhen you turn the key to power, not start the truck, and press the fan buttons you should hear the realy in the driver kick click and the one in the dash click.
I do not know if the 94 is the same as the 95 becuase the dash is different in your 95 air bags etc.

 

[Bloomer]

Another Sympton of the problem

Have not driven the LC much lately. Started it up the other day and pushed one of the fan buttons. Blower fan worked. I tried the various speeds and the speeds seemed to adjust up and down depended on which switch was activated. However, the button that accesses insider recirculation (max blower speed) or fresh outside air (lower speed) did not seem to make much difference.

Turned the vehicle off after a few minutes, then restarted. Fan blower did not work.

I am perplexed. Any thoughts, anyone?

 

[Walking Eagle]

Does it have the auto control unit? My LX does and after replacing the control w/ a junkyard unit for $100 and a new one for $450, I found that there is another control unit under the dash. It sits such that if you ever have a leaky windshield it will get water in the housing, then corrode. Mine was an intermitant failure. Replaced that and no problems in years.

 

[Bloomer]

No auto control

Thanks for the thought Walking Eagle....by auto control, are you referring to a dialed in temperature that the system tries to maintain? My LC does not have that.

 

[Walking Eagle]

Thanks for the thought Walking Eagle....by auto control, are you referring to a dialed in temperature that the system tries to maintain? My LC does not have that.

There is a button on the front that says "auto" you push it and it will adjust the fan and where it's output goes based on the temp setting.

 

[Bloomer]

Nope

There is a button on the front that says "auto" you push it and it will adjust the fan and where it's output goes based on the temp setting.

Yeah...I don't have that.

 

[FloridaFJ80]

Sorry to revive an old thread, but did you ever get this fixed.

Walking Eagle, where is the location of the control unit under the dash that you talk about?

I am having this issue. My blower or anything doesnt work when I push the buttons. I have tha auto control unit in my 96 LX.

 

[Walking Eagle]

Sorry to revive an old thread, but did you ever get this fixed.

Walking Eagle, where is the location of the control unit under the dash that you talk about?

I am having this issue. My blower or anything doesnt work when I push the buttons. I have tha auto control unit in my 96 LX.

It's above and to the right of the gas peddle. If you search walking eagle and a/c, somewhere on here I listed the part number.

 

[Walking Eagle]

https://forum.ih8mud.com/80-series-tech/226282-hvac-system-stumps-dealer-2.html

 

[FloridaFJ80]

Awesome thank you gonna look at mine.

 

[FloridaFJ80]

Looked at mine and it had water, definitely the culprit of my fan not working.

 

[40thAnnivCruiser]

This forum is awesome thank you all for saving me so much angst and stress. The DIY's and troubleshooting efforts were spot on and thank you Walking Eagle for the pics and location.

Been dreading tackling this job for over a year and questioned if this was truly the issue until I cracked mine open to find whats below. Pics are prolly a bit blurry but popped the new one in and she fired right up with ice cold ac FINALLY! Also bought some dielectric grease as sealer too around connectors and box JIC.

 

[FloridaFJ80]

Same here thanks to this thread and WalkingEagle replaced mine and fired right up. Found mine from a wrecked lexus in puerto rico.!!

 

[BigShow]

Thanks for the thought Walking Eagle....by auto control, are you referring to a dialed in temperature that the system tries to maintain? My LC does not have that.

Mine does, and I am also getting the same symptoms. My AC seems to work when it wants to. I replaced the control unit in the dash with one from a donor truck. It worked for a day and than stopped again. But this is the first I have heard about a second control unit under the dash. Where is that exactly?

 

[Walking Eagle]

Mine does, and I am also getting the same symptoms. My AC seems to work when it wants to. I replaced the control unit in the dash with one from a donor truck. It worked for a day and than stopped again. But this is the first I have heard about a second control unit under the dash. Where is that exactly?

Scroll up to post 11.

 

[BigShow]

Thank You walking Eagle. I Hate electrical problems!!!

 

[KansasLX]

So would this cause the radio, clock and cig lighter to not work also? At first I was having a intermittent problem with just the A/C heater controls not working, none of the lights on the dash control would come on, I hit the dash and it worked.
A couple days later I noticed that the blower quit working but, the lights on the control were still working, then I noticed that the clock, radio and the cig lighter had no power either. So all in all I have no blower function, radio, clock or cig lighter. I checked the fuses and the fusible link behind the cig lighter and all are good.
I have a 97 lx

 

[BigShow]

Hey Kansas. Sorry this has taken so long. I tried to reply to this a while ago and lost my internet half way thru. Than i forgot to get back to it. I went and pulled my cig lighter fuse and yes, it killed he radio and the clock as well. The AC is a different story though. I think you have two different problem going on.
The AC has its own computer thats located in a white box under the steering column. The problem is very rarely the switch. Most often its the computer. Pull the white box and unload the board. look for corrosion. Water gets in the box and has no where to go. it collects in one corner because the box is at a weird angle and the result is AC that works when it feels like it. Try cleaning the corrosion with a quality electronics cleaner and a soft tooth brush. before your re-assemble and re-install, drill a small hole in the low corner so you aren't doing this again. If that dosnt fix your AC - our friends at Cruiserparts.com can fix you up with a computer.
As for your radio etc.. i would pull the radio or cig lighter and start metering back from the appliance to the fuse block. there has to be a failure between the fuse and the appliance. Its probably right there at the fuse block considering that all three of those appliances go out at once. The FZJ80 wasnt blessed at birth with an extra space in the in-cab fuse block so it would behoove you to fix the problem rather than try and bypass it.