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94 4runner 2.8 diesel wiring problems

DarrenAU on Wed December 19, 2012 9:46 PM User is offlineView users profile

Year: 1994
Make: Toyota
Model: 4runner
Engine Size: 2.8
Country of Origin: Australia

Well I finally decided to get a ac kit from the local wreckers. It all looks good and have shown it to some ac installers and they say it all looks pretty good too.

I'm just having some problems trying to work out how to connect it up in regards to the wiring. There is a plug that comes out of the compressor and splits to some sort of pump mechanism and a another plug. I found a spare connection near the battery which would reach but its the wrong size, and i'm not really sure if it is actually for the ac. The pump mech I have hardly an idea where that is to go something to do with the idler??

The next connection is on the evaporator behind the glove box. only found one connecter near the plug on the evaporator and doesn't fit.

I hope my problem is easy to understand I attached some photos to help visually.


1. wide angle view of evaporated behind glove box

2. close up of evaporator and mysterious plugs

3. Basic layout of my engine bay with out the compressor sitting in it yet

4. plug, plugged in to compressor

5. plug found near battery that doesn't fit

6. close up of plug that comes out of compressor with pump mech.

94RX-7 on Sat December 22, 2012 8:56 AM User is offline

Your "pump" appears to actually be a solenoid. I'm betting the rubber hose hooks to a vacuum diaphragm somewhere near the throttle linkage to give it a bit of extra gas every time the compressor cycles on to compensate for the load. I can't get more specific because I don't know that particular model at all.

DarrenAU on Tue December 25, 2012 10:55 PM User is offlineView users profile

Thanks for your reply, every bit of info helps with this puzzle

mk378 on Wed December 26, 2012 11:24 PM User is offline

That part may only be relevant to a petrol engine. I think those simply opened a valve causing an intentional vacuum leak to increase the idle. Obviously a diesel would be different.

Are you sure there wasn't an extra harness? Often there is a little A/C wire harness that is part of the kit that ties everything together (between the evaporator and the parts under the hood). You may not have all the parts.

DarrenAU on Fri January 11, 2013 4:59 PM User is offlineView users profile

Thanks mk378, i think your spot on, i dont think this is for my model engine(diesel ln130). But everything fits well just need to find out if i can still make it work.

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