***I know this is lengthy, but if you have time, sit down and read all of it. I made it as thorough as I could, with pictures, in hopes that it can easily be understood***
I recently bought a '95, 4.0l HO AW4, completely stock. This is a new introduction to me as far as Jeeps go, I've been into cars all of my life so I'm still learning about Jeeps. I am pretty mechanically inclined so I'm not completely clueless as far as that goes. Before anyone tells me to search, I have, that's how I knew to check the following items that are bold/underlined. I feel like this is a special case, that's the only reason I made a new thread for it.
Blower motor/Blower motor resistor/Heater control valve
I got it from a friend of mine (this is owner #2), and he had bought it from another friend of his (this is owner #1). The reason I said that, is because the 1st owner of the three of us, had said the hvac didn't work, and told the 2nd owner of the three of us that it just needed a blower motor resistor to fix it. Owner #2 that I bought it from, never bothered putting a new resistor in it, didn't mess with it at all the entire time he owned it. So. I got both a new blower motor resistor and blower motor and installed them at the same time. Still nothing. I looked at the little heater valve under the hood that runs to the heater core hoses, it tested as good.
So far we have the following things as being known as good:
-blower motor resistor
-blower motor
-heater control valve
Blower speed switch-?
A few nights ago I took the cluster trim piece off, the radio out, and unscrewed the climate control assembly from the dash and pulled it out a little bit (everything still connected as far as cable/wiring harnesses go) to see what I could find. I found this:
This is the harness going to the blower speed switch. Burnt up, ugly. I fixed the wire earlier (cut out burnt end, replaced section with new wire and soldered the connection, did it the correct way). I dissasembled the switch and found that the little rivet that goes through the plastic backing piece that holds the male end connector for that wire had burnt through the plastic, decided to get crafty and jb welded the rivet back to the plastic (parts stores are closed at 8pm on a Sunday around here, did the best I could with it.) Plugged everything back up, still nothing. Maybe the switch is bad? Everything should have been okay with how I fixed it, and put it back together just like it came apart. Maybe the switch is still bad? I'll let someone with more experience on here make that call.
Vacuum canister (behind front bumper)
Decided since that didn't do anything, that I would hop underneath the front bumper and check out the vacuum canister, as I had read that can cause problems too with vacuum leaks and only having the defrost vent work. It was basically sitting in there, with a vacuum line that was disconnect. Pulled the canister out, plugged that vacuum line into the vacuum T located on top of the passenger side fender well. Still nothing. The canister has no cracks or leaks.
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A few days ago after I had first noticed the burnt wire going to the blower speed switch, I got home, pulled in the driveway and realized that the backlight for the climate control switch assembly (where you choose hot/cold and where you want the air to come out at) was lit up! Since I bought the Jeep I just thought the bulb was burnt out or something, because it didn't work until this occassion. I still had the radio out at this point, so I could see the harnesses going to the climate control assembly. Since the light was lit up, I figured eh, I'll wiggle the harness going to the blower speed switch and turn the switch to see if I could get anything. The heat came on for a few seconds, then I stopped wiggling the harness and it went off again.
Fuses
As of now, I have no backlight lit up, no heat/air. Before anyone asks, I did check the fuses before I began any of this process, however I'm a little puzzled on that also. I have a Haynes manual that I looked at, and it has 2 or 3 different diagrams for the kickpanel fusebox. On one diagram, I'll have some fuses that are correct, some that are not. On the next diagram, same story. Basically I cannot tell which spot in the fusebox is my blower fuse. I know that sounds dumb, but its basically like my kickpanel fusebox has been fused between two different diagrams.
***From what I understand, fuse #3 is supposed to be a 25amp blower fuse, is this correct? Because the #3 fuse holder is made to where I can't put a fuse in it for some reason? It has both pinouts for a fuse, but the actual plastic fusebox piece is raised up in the middle to where I cannot insert a fuse in that spot. Here is a picture of the box on MY specific Jeep:
See where the #3 location is? There's a power accessory spot that has the two pinouts, however has the raised up piece I was talking about. #3 looks like it has a pinout on one side, but not the other? Therefore I'm kind of lost as to seeing if the fuse is correct/in the correct spot, because of the two diagrams in my manual seemed to blended together, thus what I have. Any insight on this? I checked all of the fuses in the fusebox, and they were all fine. This still doesn't explain why the backlight worked and the heat did come on when I wiggled the harness, it would mean it had to have the fuse in it, but I can't tell what exactly is going on until I know for certain what each spot in the fusebox is for, and what size fuse goes where. This would be alot easier if my fuseblock matched up with either diagram in my manual.
I'm honestly not sure at this point. Should I try putting a NEW blower speed switch in to see if that does it? I know I sort of rigged it earlier, but I was doing the best I could do for a Sunday night. I would atleast think even if there was no air, the backlight would atleast light up. Does anyone have any input on this? I'm sincerely lost and out of ideas, other than possibly the switch. And I definately would like to get this fusebox situation figured out, I don't like not knowing what's what down there.
Anyone with any insight on this, please, speak up, it would be greatly appreciated. Thanks in advance,
Mike
I recently bought a '95, 4.0l HO AW4, completely stock. This is a new introduction to me as far as Jeeps go, I've been into cars all of my life so I'm still learning about Jeeps. I am pretty mechanically inclined so I'm not completely clueless as far as that goes. Before anyone tells me to search, I have, that's how I knew to check the following items that are bold/underlined. I feel like this is a special case, that's the only reason I made a new thread for it.
Blower motor/Blower motor resistor/Heater control valve
I got it from a friend of mine (this is owner #2), and he had bought it from another friend of his (this is owner #1). The reason I said that, is because the 1st owner of the three of us, had said the hvac didn't work, and told the 2nd owner of the three of us that it just needed a blower motor resistor to fix it. Owner #2 that I bought it from, never bothered putting a new resistor in it, didn't mess with it at all the entire time he owned it. So. I got both a new blower motor resistor and blower motor and installed them at the same time. Still nothing. I looked at the little heater valve under the hood that runs to the heater core hoses, it tested as good.
So far we have the following things as being known as good:
-blower motor resistor
-blower motor
-heater control valve
Blower speed switch-?
A few nights ago I took the cluster trim piece off, the radio out, and unscrewed the climate control assembly from the dash and pulled it out a little bit (everything still connected as far as cable/wiring harnesses go) to see what I could find. I found this:
This is the harness going to the blower speed switch. Burnt up, ugly. I fixed the wire earlier (cut out burnt end, replaced section with new wire and soldered the connection, did it the correct way). I dissasembled the switch and found that the little rivet that goes through the plastic backing piece that holds the male end connector for that wire had burnt through the plastic, decided to get crafty and jb welded the rivet back to the plastic (parts stores are closed at 8pm on a Sunday around here, did the best I could with it.) Plugged everything back up, still nothing. Maybe the switch is bad? Everything should have been okay with how I fixed it, and put it back together just like it came apart. Maybe the switch is still bad? I'll let someone with more experience on here make that call.
Vacuum canister (behind front bumper)
Decided since that didn't do anything, that I would hop underneath the front bumper and check out the vacuum canister, as I had read that can cause problems too with vacuum leaks and only having the defrost vent work. It was basically sitting in there, with a vacuum line that was disconnect. Pulled the canister out, plugged that vacuum line into the vacuum T located on top of the passenger side fender well. Still nothing. The canister has no cracks or leaks.
-------------------------------------------------------------------------
A few days ago after I had first noticed the burnt wire going to the blower speed switch, I got home, pulled in the driveway and realized that the backlight for the climate control switch assembly (where you choose hot/cold and where you want the air to come out at) was lit up! Since I bought the Jeep I just thought the bulb was burnt out or something, because it didn't work until this occassion. I still had the radio out at this point, so I could see the harnesses going to the climate control assembly. Since the light was lit up, I figured eh, I'll wiggle the harness going to the blower speed switch and turn the switch to see if I could get anything. The heat came on for a few seconds, then I stopped wiggling the harness and it went off again.
Fuses
As of now, I have no backlight lit up, no heat/air. Before anyone asks, I did check the fuses before I began any of this process, however I'm a little puzzled on that also. I have a Haynes manual that I looked at, and it has 2 or 3 different diagrams for the kickpanel fusebox. On one diagram, I'll have some fuses that are correct, some that are not. On the next diagram, same story. Basically I cannot tell which spot in the fusebox is my blower fuse. I know that sounds dumb, but its basically like my kickpanel fusebox has been fused between two different diagrams.
***From what I understand, fuse #3 is supposed to be a 25amp blower fuse, is this correct? Because the #3 fuse holder is made to where I can't put a fuse in it for some reason? It has both pinouts for a fuse, but the actual plastic fusebox piece is raised up in the middle to where I cannot insert a fuse in that spot. Here is a picture of the box on MY specific Jeep:
See where the #3 location is? There's a power accessory spot that has the two pinouts, however has the raised up piece I was talking about. #3 looks like it has a pinout on one side, but not the other? Therefore I'm kind of lost as to seeing if the fuse is correct/in the correct spot, because of the two diagrams in my manual seemed to blended together, thus what I have. Any insight on this? I checked all of the fuses in the fusebox, and they were all fine. This still doesn't explain why the backlight worked and the heat did come on when I wiggled the harness, it would mean it had to have the fuse in it, but I can't tell what exactly is going on until I know for certain what each spot in the fusebox is for, and what size fuse goes where. This would be alot easier if my fuseblock matched up with either diagram in my manual.
I'm honestly not sure at this point. Should I try putting a NEW blower speed switch in to see if that does it? I know I sort of rigged it earlier, but I was doing the best I could do for a Sunday night. I would atleast think even if there was no air, the backlight would atleast light up. Does anyone have any input on this? I'm sincerely lost and out of ideas, other than possibly the switch. And I definately would like to get this fusebox situation figured out, I don't like not knowing what's what down there.
Anyone with any insight on this, please, speak up, it would be greatly appreciated. Thanks in advance,
Mike
