How to install A/C in a 1st Gen Pickup/4Runner (3 Viewers)

[clx16]

ok i just looked and i have a 47200 also. and it does not have any numbers after it. i was told it was from an 85 toyota pickup. I am pretty sure the bracket i am using also works for mounting an 80 series land cruiser compressor as i have one of those also. i will try to get a look at the bracket and see if it has a part number on it.

 

[braddamarlon]

ok i just looked and i have a 47200 also. and it does not have any numbers after it. i was told it was from an 85 toyota pickup. I am pretty sure the bracket i am using also works for mounting an 80 series land cruiser compressor as i have one of those also. i will try to get a look at the bracket and see if it has a part number on it.

My bracket is off the truck so I'll report back with a number. The one on my truck came off a 86 4runner the spare one I have I'm not certain the year

 

[braddamarlon]

In case anyone was wondering I think these are the last numbers for that narrow type bracket ac compressor

 

[rypajo]

Hello, I'm working through getting my a/c system running. I found the blue wire with black line in the main harness that I believe to be the 12v wire for the compressor switch to activate the clutch. What is throwing me for a loop is that the wire is negative in both on and off positions. Is this because the system isn't charged so the amplifier or something else isn't letting it send a signal to activate the compressor?

 

[yotadude520]

Hello, I'm working through getting my a/c system running. I found the blue wire with black line in the main harness that I believe to be the 12v wire for the compressor switch to activate the clutch. What is throwing me for a loop is that the wire is negative in both on and off positions. Is this because the system isn't charged so the amplifier or something else isn't letting it send a signal to activate the compressor?

If there is no Freon in the system, then the low pressure switch is going to cut power to the clutch.

I would charge the system, you can manually give the compressor 12V via alligator clips and tapping the other side on the battery intermittently. Then put a test lamp on the wiring harness that goes to it and you should see power once Freon gets in the system.

Be very very careful with the power direct to the compressor, even though there's oil in the system you don't want to burn it up. Do not power it for more than three seconds at a time.

 

[rypajo]

If there is no Freon in the system, then the low pressure switch is going to cut power to the clutch.

I would charge the system, you can manually give the compressor 12V via alligator clips and tapping the other side on the battery intermittently. Then put a test lamp on the wiring harness that goes to it and you should see power once Freon gets in the system.

Be very very careful with the power direct to the compressor, even though there's oil in the system you don't want to burn it up. Do not power it for more than three seconds at a time.

So I think I have two wiring issues. The wire I thought was for the 12v+ of the compressor is actually a negative from the a/c harness. It's blue with black, someone on facebook said it's the negative to the safety switches. I have no idea what it is supposed to hook up to so any help would be appreciated. What color should the wire be for the 12+ side of the compressor be. Can see my harness in the photo. Does it loop up under the intake and then back down? I feel like most photos I've seen the wire comes from where I'm showing in the harness but I opened up my harness and I'm not seeing an additional wire. My 86 had factory A/C and everything was in place except the compressor was removed.

\

 

[Mudder]

@rypajo what year and engine truck are you working on? Maybe someone has the AC wiring diagram to help out.

 

[rypajo]

@rypajo what year and engine truck are you working on? Maybe someone has the AC wiring diagram to help out.

1986 22re Found this diagram last night. No idea what the connection is to the left of the magnetic clutch. About to go look at the connector to see if that is the negative wire I found loose in the harness.

 

[rypajo]

I am not positive but I don't think this is the plug that goes to the compressor clutch. I'm only seeing five wires here, not six like the diagram. I believe that wire that bypasses the connector is the one that is cut. Any ideas on which connector I should be looking for? None of the other ones look like what I would assume the diagram would be pointing to.

 

[pappy]

I am not positive but I don't think this is the plug that goes to the compressor clutch. I'm only seeing five wires here, not six like the diagram. I believe that wire that bypasses the connector is the one that is cut. Any ideas on which connector I should be looking for? None of the other ones look like what I would assume the diagram would be pointing to.

I'm really not much use in this discussion. But, that cut wire looks like it's a W-B, white with a black stripe. Toyota traditionally uses W-B wires for grounds. I also see a W-B with a butt splice. I suspect those two are related.

 

[rypajo]

Agreed. Any idea what color the wire is that goes to the compressor is? I can't find any definitive. Is the plug I'm showing the supposed to be the 1 through 6 plug in the diagram? I'm guessing with the system not charged if I do find the correct wire under the hood for the clutch engage it won't have continuous power right? Any idea where that under hood blue wire with black stripe should be connected to? Does that have something to do with if the engine is overheating?

 

[rypajo]

Agreed. Any idea what color the wire is that goes to the compressor is? I can't find any definitive. Is the plug I'm showing the supposed to be the 1 through 6 plug in the diagram? I'm guessing with the system not charged if I do find the correct wire under the hood for the clutch engage it won't have continuous power right? Any idea where that under hood blue wire with black stripe should be connected to? Does that have something to do with if the engine is overheating?

I'm really not much use in this discussion. But, that cut wire looks like it's a W-B, white with a black stripe. Toyota traditionally uses W-B wires for grounds. I also see a W-B with a butt splice. I suspect those two are related.

See above, forgot to tag you.

 

[pappy]

Any idea what color the wire is that goes to the compressor is? I can't find any definitive. Is the plug I'm showing the supposed to be the 1 through 6 plug in the diagram? I'm guessing with the system not charged if I do find the correct wire under the hood for the clutch engage it won't have continuous power right? Any idea where that under hood blue wire with black stripe should be connected to? Does that have something to do with if the engine is overheating?

The L-B wire is for the compressor clutch.

 

[rypajo]

The L-B wire is for the compressor clutch.

Are you sure? L-B is the blue with black stripe right? When I test that wire it's giving a negative signal and completes a circuit on my test if I touch the positive terminal with my tester. Will that change once the system is charged and ready to function?

 

[pappy]

Are you sure? L-B is the blue with black stripe right? When I test that wire it's giving a negative signal and completes a circuit on my test if I touch the positive terminal with my tester. Will that change once the system is charged and ready to function?

Yes, I'm sure. From the 1986 EWD.

 

[rypajo]

Yes, I'm sure. From the 1986 EWD.

View attachment 3678837

Well dang, I was chasing down nothing after what someone said on Facebook. Thank you.

 

[willysworker]

is an AC amplifier available for my '85 truck. My compressor clutch only get power sometimes and there is no idle up when compressor kicks in. The ac diaphragm seem good because I can shut it down.
Also what does the knob/dial on the AC amplifier do?

 

[pappy]

Also what does the knob/dial on the AC amplifier do?

It lets in more air to increase idle.

 

[dohcdelsol93]

I don't know how well the 22r or 22re will do with this mod but I installed a simple trinary switch and rewired my ac button to turn the AC on/off via a 4 post 30 amp relay I mounted near the factory fuse box. Ran a second relay to run an electric fan.

Rumor has it 2nd gen 4 runner ac fans will fit under the grills of the 1st Gen 4 runner and equivalent trucks.

I also installed a newer style condenser with way more cooling fins than the OEM one.

The trinary switch works to both cut the clutch when it has too much or too little pressure. It can also run the AC fan but I have mine wired to run anytime the compressor is energized. This switch screws into the high side r134a charge port.

I'm not running a factory Toyota engine so more RPM at idle was of no importance to me.

Pics of the upgraded condenser and trinary switch. Not the same brands I purchased but similar in function.

 

[Mudder]

I'm running an AC Condenser for a 1989 Toyota Pickup on my 1984 Toyota Pickup, on both the original front clip and the current one from a 1988 Toyota Pickup. I believe I had to drill one hole and add a nut but otherwise it fit with no issues.