Complexity of adding A/C
Jul 11, 2010 | 03:19 PM
#22
Contributing Member
Joined: Nov 2005
Posts: 8,875
Likes: 3
From: Longmont, CO
One of those mirrored heat shields for the windshield will be as/more effective (considering our low humidity) and a lot cheaper.
EVERYONE in AZ uses them, see them only rarely here in Colorado though ... they really work for short trips. Leave the windows cracked (or the wing windows open).
EVERYONE in AZ uses them, see them only rarely here in Colorado though ... they really work for short trips. Leave the windows cracked (or the wing windows open).
Aug 3, 2010 | 12:16 AM
#25
Registered User
Joined: Feb 2009
Posts: 8
Likes: 0
From: BC Canada
I am in the final stages of doing this to my V6 4runner, the big lesson I learned is that you want to know what you need first I got a set up out of a 91 4runner and its got a completely different wiring and plugs set up to my 93 4runner. I ended up getting the right harness and parts out of a 94runner.
Just need to get the truck on the road and take it to get charged.
Just need to get the truck on the road and take it to get charged.
is it posible to just bypass the plugs with your own wires? and if so how would i find out where the wires go? lol
Aug 3, 2010 | 01:19 PM
#26
Registered User
Joined: Jan 2007
Posts: 6,106
Likes: 27
There's a mini write-up in the wiki about installing a/c on an 84-85. I bet it's pretty much the same procedure for atleast the 86-88 rigs. Maybe through 95 too. Whow knows?
https://www.yotatech.com/wiki/index....&_4Runners_FAQ
https://www.yotatech.com/wiki/index....&_4Runners_FAQ
A/C Install highlights
All the 84-85 Trucks and 4 Runners are pre-wired for A/C inside the cab if yours was not equipped. However there are slight wiring differences when it comes to the main chassis plug on the upper side of the windshield. It is very important when looking for the A/C evaporator assembly to know what plug you need as there are three different styles which cannot be easy adapted to fit your chassis plug.
Fitting the evaporator assembly requires drilling three holes. If you pull back the carpet you will see three dimples to locate the pilot bit of a hole saw. You need to remove the cross over pipe from the blower assembly to the center duct manifold. You can also see these dimples on the outside of the firewall. The hole saws needed are 1" and 1.25. The drain tube is 1 inch the smaller A/C line is also a 1 inch and the bigger A/C line 1.25. Other than that the unit bolts in.
If you have a 22R carbureted truck you need a VSV valve and an idle up valve. Both parts are readily available from Toyota. The unfortunate part is the harness that controls the VSV is NLA; the good part is it can be replicated very easy if you hunt the junkyards for the correct connectors. Two wires go to the VSV and the other goes to the A/C compressor. There is a three prong pigtail connector under the fuse box inside the engine compartment; this is what the VSV and compressor plug into.
Heads up on A/C compressors it appears Toyota used two to three different styles of compressors from 84-88. To reduce the hassle of not having parts fit buy the compressor and bracket together. Brackets and compressors are not interchangeable from my experience.
All the 84-85 Trucks and 4 Runners are pre-wired for A/C inside the cab if yours was not equipped. However there are slight wiring differences when it comes to the main chassis plug on the upper side of the windshield. It is very important when looking for the A/C evaporator assembly to know what plug you need as there are three different styles which cannot be easy adapted to fit your chassis plug.
Fitting the evaporator assembly requires drilling three holes. If you pull back the carpet you will see three dimples to locate the pilot bit of a hole saw. You need to remove the cross over pipe from the blower assembly to the center duct manifold. You can also see these dimples on the outside of the firewall. The hole saws needed are 1" and 1.25. The drain tube is 1 inch the smaller A/C line is also a 1 inch and the bigger A/C line 1.25. Other than that the unit bolts in.
If you have a 22R carbureted truck you need a VSV valve and an idle up valve. Both parts are readily available from Toyota. The unfortunate part is the harness that controls the VSV is NLA; the good part is it can be replicated very easy if you hunt the junkyards for the correct connectors. Two wires go to the VSV and the other goes to the A/C compressor. There is a three prong pigtail connector under the fuse box inside the engine compartment; this is what the VSV and compressor plug into.
Heads up on A/C compressors it appears Toyota used two to three different styles of compressors from 84-88. To reduce the hassle of not having parts fit buy the compressor and bracket together. Brackets and compressors are not interchangeable from my experience.
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