RJR

Definitely a difference in wiring diagrams. Mine shows the heater fuse on the input side of the relay; scopes's shows it on the blower side of the relay. Could be a change between '93 and '94; could be a documentation error on one or the other diagrams.

If I was the designer, I'd put the fuse on the input side for better protection as per my diagram, but who knows.

D's Hilux

Thanks Scope and Ron - I had a look at a friends 4 runer and it was different as well - I have been installing an alarm system this week and really played around in there - still not sure what is going on, I have pulled the fan out and looking at it, opened the condenser housing to see what was in there - jut in case a hidden fuse or switch lived inside - it was dusty in there so I have vacuumed it out - going to give it another go in the morning on my day off. I have followed the lines back through the engine bay as well, thought I found an inline fuse but it was an interesting round waterproof wire connection, the funny thing is it went straight into another connector and the main fuse box in the - section.

Otherwise I'm off to an auto electrician .

fajardoju90

I'm going crazy looking for an answer. Bringing This back from the dead(hopefully) 95 toyota pickup. Blower works but no a.c./green light when pressed. Randomly went out yesterday on the way to work. Found the fuses behind the glove box and the 10amp was blown. Tried twice to replace it but it blows almost immediately when turning the a.c. back on. For that half second, the green light/compressor DOES come on. Any help to know where to look for a possible short? Thanks in advance

jfinkbeiner

I Had the same problem. I have owned several 4 runners. Try the ac amplifier it is la circuit board that is located behind the glove box and has sealed plastic around is but you can see the wires that go to it it will slde up some but will not come out completely. It can be unplugged but the board will not come out without taking the whole unit out. So i used a roto viberating saw and cut the plastic around it. I made a bracket and rescrewed it back on

scarolina yota

my ac stopped working out of the blue too. I have a 92 extended cab sr5 pickup 4x4. I found the a/c fuse behind the glovebox ( you have to take the whole glovebox and speaker assembly out of the dash) I replaced the fuse with a 10 amp and it immediately blew so I put in a 15 amp and it held. So quick fix?

old87yota

Never use a higher rated fuse than what is supposed to be installed, unless you like burned wiring and electronics.

asg1290

Sounds to me like you have a short. Probably tweaked some wires when messing around back there.

Check out this video for how you would tackle a short. You will need a multi meter at the min.

old87yota

South Main Auto videos are both informative and entertaining!

scarolina yota

So upon further consideration I agree that putting a bigger fuse in is not correct. I did find when I pulled my clutch and coil off of my a/c compressor that the coil wire had somehow gotten the insulation rubbed off of it. Installed “new” pull a part coil and clutch and haven’t had any problems. Could have probably fixed the old coil wire but I already had the new one. I did add the old parts to the spare parts box