A/C cycling switch wiring.

[Randall Coffman]

New member here, first time to post. I'm working on a 1992 Ram 250 a/c, everything new except evaporator. Had hoses rebuilt at reputable shop, due to discontinued parts they cut off sensing tube and transistor cycling switch and sent a Murry 35720 in its place. I have hit a wall trying to wire it in correctly. I found an old post from fastback67 with pictures, but am unable to make out which wires go where. System was evacuated an charged and blows cold when hot wired, just need to get this working properly. Thanks in advance!

 

[p-Bar]

how about this page pretty detailed.

https://www.turbodieselregister.com/threads/new-owner-1st-question.260581/page-7#post-2647302

 

[Randall Coffman]

how about this page pretty detailed.

https://www.turbodieselregister.com/threads/new-owner-1st-question.260581/page-7#post-2647302

Thanks for your reply, I found that earlier but I can’t tell where the middle of the three wires(hot with key on) ties back into the harness

 

[Topzide]

It appears that it's the factory wire setup with the middle wire being the stock position, maybe just shortened due to location of the new switch. Glad to see you've found a fix to keep your truck cool and on the road!