Air conditioner electrical troubleshooting ?
- Thread starter easternguy2005
- Start date
I have no idea what that guy is talking about. As far as I know there isn't a 25 amp fuse associated with the AC system. The clutch is powered by the 10 amp fuse. When I agreed with him I was referring to the clutch testing method he mentioned. I should have screened his post more carefully. You should have looked at the schematic...
Well, considering that I'm unsure of why you asked the question. Unlike much of what you'll read on this forum a schematic has no ambiguity.
yea sorry about the 25 amp statement. it is the 10 amp fuse over there that goes to the a/c magnet clutch in j/b no. 4 in the right kick panel. 40 amp to blower motor.
i believe you have already checked the 15 amp in the left kick panel that is the cig labeled fuse.
my neighbors supra did not engage the clutch so a mechanic wired power directly to the relay bypassing the oem wiring so his a/c clutch would engage. we replaced his fuse in the right kick panel and his clutch worked then.
i believe you have already checked the 15 amp in the left kick panel that is the cig labeled fuse.
my neighbors supra did not engage the clutch so a mechanic wired power directly to the relay bypassing the oem wiring so his a/c clutch would engage. we replaced his fuse in the right kick panel and his clutch worked then.
Sorry if I'm hijacking. I have read through this post and learned enough to hopefully fix my issue as well. My A/C was wired directly to the blower motor wiring. The problem I have is similar because when I disconnect the wire from the blower motor and press the ac button on the cc my compressor will not kick on either. In addition my car wont idle up and it will stall (ac on) if I push in the clutch from about 2000rpms. My guess would be that the ECU is not getting a signal from the CC panel! :dunno:
I will check the fuse when I get home..
I will check the fuse when I get home..
Well my 10 amp fuse was blown. Replaced it, disconnected the wire from the blower fan and my A/C button on the CC unit still doesn't do anything. I also tried to pull a code 51 when turning on the A/C and I do not get any codes.
ok, i am having this same problem, tomorrow i am going to replace both relays under battery and see if it works, has anyone else found a fix to this..
mhopemk3;1060301 said:
That 10amp fuse is fed from the 40 amp C.B that is in the drivers kick panel as seen here (the wire labled L-O = Blue/Orange Stripe).
http://www.cygnusx1.net/Supra/Library/TEWD/MK3/manual.aspx?S=Main&P=140
notice the two other fuses
20 amp Dome & 7.5 amp Gauge fuses. Those are the +12vdc for the Heater Control Assembly (the climate control panel).
The 10 amp fuse in the passenger kick panel controls the clutch but the turn on relay is fed from the 15amp Cig fuse.
JJ has provided some good info in this thread. I am having a similar problem. As soon as I get home, I will check all of the above.
pitbull2517;1095040 said:
well i went to the closest junk yard and found only two mkiiis, i took both of the relays off and tried both of them, and still no a/c. right now i have it straight wired through a switch but of course would like to use it like toyota intended...also if anyone needs parts off of one of them let me know, i might have to make another trip up there in a month or so...
Still trying to get this AC clutch to engage. Put new relay, CC and amp in place and nothing changed. Freon pressure is good and HI/LO switch is new. All lights (green) work on the CC.
I don't get a ECU code when the AC is engaged but DO get it when gas pedal is pressed. I can run a hot wire from the amp (to clutch relay) and it engages.
What wiring can I look at now ?
I don't get a ECU code when the AC is engaged but DO get it when gas pedal is pressed. I can run a hot wire from the amp (to clutch relay) and it engages.
What wiring can I look at now ?
Wait - Straight wired ? Does it actually work ? At what point can you put a switch without worrying about "blowing it up" cause the compressor has to turn on and off.
I'm suspecting a ground somewhere but the relay is not grounded to the body.
The relay next to the battery on mine tests ok - the relay I replaced cause I couldn't really test it was the one next to the gas pedal between the blower and the firewall.
I'm suspecting a ground somewhere but the relay is not grounded to the body.
The relay next to the battery on mine tests ok - the relay I replaced cause I couldn't really test it was the one next to the gas pedal between the blower and the firewall.