I bought 1980 Fj40 with the factory NipponDenso a/c. Here is the problem: When turning on the a/c by the control in the cab, the compressor will not turn on. The controls all seem to work including the fan, but the controls will not engage the compressor. I did get the compressor to work by doing an override at the the pressure switch. I also got it to work by doing an override at the electrical connection at the interior on/off control. When doing this, everthing works fine and the a/c blows COLD! I think the problem has something to do with the fact that this fj was de-smogged by one of the previous owners. I am wondering if they removed a part out of the a/c circuit that would engage the compressor when turned on. From the wiring diagrams i have seen on line, it seems like there is suppose to be a A/C solenoid/or some sort of idle up solenoid that is part of the a/c system. I am thinking my fj may be either missing this or its not hooked up. Here are some pictures of where I think the problem my be. There are several electrial contections here that are not hooked up and I think one of these is the problem..BUT not really sure?? I dont want to put all the smog stuff back on, but rather just ad the piece that is needed to get the air to work. Thanks in advance for your help!!