If someone has a wiring diagram/schematic for the A/C system, do you mind sharing it with me please? I need to trace the root cause of why my A/C Compressor is always on... As suggested by another forum member, I need to check why my A/C Compressor clutch relay (in the fuse box) only has 3 wires in the socket whereas it is suggested that I need 4 wires for the relay to function as it is intended to... Thanks!
Found one!!! I found a complete wiring diagram by searching google... All I need now is someone who is willing and have patience to help me understand this freakin diagrams.... this is totally information overload!!!if anybody needs it, let me know and i'll email it to you... it is listed ofr an 88 celica but im sure it should apply to 89 as well...
not necessarily "always"... it turns on whenever I turn the blower is on... it does not matter if I press/de-press the A/C button (which does not light up), the compressor and the clutch is spinning and RPM drops and I hear the whistle from the freon in the lines ... when i turn the blower off, i can physically see the clutch disengage so I know the compressor is "off" and the RPM goes up... same goes if I am on heat... the compressor is still on as long as I have the blower fan running... i did get some very imformative wiring diagram but for a unexperienced noob like me, its like reading a foreign language...
it's generally confusing even for someone like me who's always tackled wiring gremlins. follow the colors on the wire and go through it very slowly and actually take the time to look at it. kind of like learning statistics or algebra for the first time...it's straightforward. you just gotta sit there and give it an honest overview. ps. i don't think it was necessary to make a new thread for this. this post could have been simply part of the a/c questions thread that you have opened up.
ok in this first diagram 12 volts comes in from the altenator through line B through the heater relay and out through a black wire which changes toa purple wire with a red stripe when it goes through a 10 amp AC fuse.following the red line it goes to the magnetic clutch relay. Note that it does only have 3 wires so your relay is wired correctly. The relay closes and sends power to the magnetic clutch when it receives a signal from theA/C amplifier. The orange line sends 12 volts to the AC push button switch and the yellow lines show where the 12 volts goes when the AC push buttonswitch is pressed.Heres a list of all the conditions that have to be met in order for the magnetic clutch to engage. If any one of these conditions isn't met the clutch should not engage .ie if you don't have the AC push button switch pressed the clutch should not engageYou can test the AC Amplifier wiring harness if that tests out properly then the only solution is to replace the AC Amplifier as it is sending out the signal to close the magnetic clutch relay when it should not.
Im thinking terminal one is the gold color one? Another thing is that i tested the amplifier as described but i did not get all the correct specified results. On some voltage tests, it gave me the specified values, but others did not. Does it mean my amplifier is still ok since i did not get all the specified readings. the manual says to replace the amplifier when the test conditions give the correct readings.
I'm getting continuity from 1-2, but when I juice it up, I can hear it click but not getting and continuity from 3-4... so this may be the issue... i've already bought another relay so when the part comes in, I'll test it to see... as for the a/c amplifier, im kinda confused when the diagram said "If circuit is correct, replace the amplifier"... what if i'm getting some of the specified outcome given a condition, but not all... if this is the case, doesn't it mean that the circuit is not correct and the amplifier is presumably working?
I'm looking for a st182 diagram, the 182 pump i bought has an extra wire and what looks an extra valve on the side of the housing. Anyone got any info?
This is for a 1993, you must have got it from a car that had AUTO A/C. The diagram shows a 4 pin plug to the compressor, if you don't have AUTO A/C the compressor plug only has 1 pin
Thanks Dave, it does have the 4 pin plug. I'll need to compare the diagrams, as you know the JDM 162 comes with auto A/C but only 3 wires. I'll be a lot happier once it's connected and working
so what is the difference between the A/C amplifier and the System amplifier? I'm slowly starting to understand this (i think)... when i do the a/c amplifier harness test, if all test condition/s are met, then the signal/line is working and the amplifier may be at fault... however, if the test conditions are not met, then that specific line is bad and needs to be resolved... clear as a mud?
