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i am almost sorry i told you to do that... as you really don't understand quite what i was thinking..

i would think that the best idea would be to supply the ac clutch relay with power from its OWN circuit...

with its own fuse......   by figuring out if both pink wires to the relay are actually wired as shown...


i have not a clue of where to tap into power on your car at...  something i normally do in person...

be sure that you seal off the ends of the pink wire that you disconnect from the relay socket..

you might actually want to not cut the wires.. but to buy a relay socket pigtail...    and extend the socket..    only using the wire from the ECM and the wire to the compressor ...

the wires  supplying power are much easier to connect.. and if it does not work...    you can go back in a few seconds...

relay pigtail...



using 2 of these to connect to the relay socket..   one to the ECM wire.. one to the clutch wire...




i wish my thoughts would come out of my fingers and across the keyboard ...  

NO no I think I understood what you were trying to say. Let me be more specific. The two pink wires going to the clutch relay have power. I traced them both and they both go to a part that has several pink wires soldered together. They go to a fusible link at the starter. So yes the two pink wires from the clutch relay are wired like shown in the diagram both wires have the same power source. In fact all pink wires to the relays rad fan aux fan coil clutch blower mtr and fuel pump come from that soldered spot which stems from a fusible link from the starter.  

So what I believe you were saying was to stop using the source from where the two pink wires get their power and instead give the coil clutch relay a different power source. Correct? With a 10amp in line fuse for the two pink wires. If that fuse pops the comp stops but the fans keep going because they have a different power source and fuse to go on. Correct?  

i think you have it... straight....      

great......

sorry for the long delay.. i was zzzzzzzz.   late night last night.. early morn today..  

I thought I kind of had it. Ok well Ill get it done. Should not be to bad now. Wayne I wanna thank you bud for lending out an ear and expertise. Next project Dodge ram 1500 pick up. Comp keeps kicking on and off. Sometimes it engages and lets quickly sometimes it engages for a while then lets go. Whats strange is when youre driving it blows cold when you stop at a light or stop sign it blows cold. And acceleration affects the cycling of the clutch. Not low on coolant. Hope you recover quickly. Dodge Ram 1500 4.7L V8 2005 Quad-cab 1/2 ton.


Jdirk79  

i am ok... just needed some sleep...4 hours just does not cut it..  i cover more than this forum..  i actually enjoy this...

do you have an OBD2 scan tool that shows live data so you can look at the AC request???

let me look over at AZ  and see if there is a diagram on that one..  i don't have anything that new in print..


seems the AC clutch is controlled by a relay in the under hood fuse box...

hopefully the owners manual in the glove box is still there to help identify the location of your ac clutch relay..

you might want to just straight out replace it...   working the new one in and out of the socket a few times to freshen up the contact faces in the relay socket..

cars newer than 2001 use a LOT of CAN devices... where the computer sends a digital signal to the controller.. but perhaps not on this model...  i cannot find a copy of the wiring diagram... so its going to be up to you to search one out ..

eautorepair.net   or alldatadiy.com   both will have it..

you might want to hook up a small bulbed test light to the compressor circuit to monitor the voltages while operating..

or pierce the wires to monitor it with your digital volt meter...  

Hey Wayne hope you got some rest. Well here is what I have learned so far. The condenser fan does not come on. At all. The relay for that fan is good. The ac clutch is also good. I have not removed the fan and run straight power to it to see if the fan itself is good. I will do that though soon I hope. Also a new symptom when the compressor comes on the truck bogs down. In other words when the compressor comes on it makes the truck idle low for a few seconds.

Well I was reading online and I read an article that said that its possible that on the Dodge models like the one I have the Condenser fan HAS to run when the ac request is initiated or the system won't run right. I also read a  post that said that if the system blew cold while driving but hold at a stop or idle the condenser fan, relay, or fuse would be at fault. W@hat do you think?  


Jdirk79  

Wow Wayne you must be busy its been a while..??  

no.. i looked at your reply.. i could not think of a proper answer..


did you open the wiring diagram above in a new window or click to print it...

the AC system wiring is in the upper left corner.. its not all visible unless you see the whole page...  

Im confused?? The cutlass ciera is a done deal. Using back and forth to houston everyday now. I was referring to the dodge pickup.. Sorry maybe I confused you too.


Jdirk79

p.s. in reference to the 05 dodge 4.7litre v8 scenario. Did not see a wiring diagram for the dodge.  

i totally missed the change in models...


check for chassis codes with scan tool...   i don't know off the top of my head what any AC codes would be..

a CXXXX a BXXXX or a UXXXX code..

most of the newest model cars have the compressor controlled by the BCM or PCM...  they also usually have a pressure sensor.. not a pressure switch.. so the computer knows what the system pressure is all the time..

i have heard that on dodge's you can cycle the key 3 times on and off with the final position in the on... and the check engine light will flash codes..  or a display will show codes..


i will look around. but my info for stuff newer than 1999 is limited...