Need help with AC!

[95Cobra302]

Well about a few months ago i realized that when i turn on my ac my high speed fan doesn't come on. Since i used to use that to turn on my fan when i wanted to, i did the fan switch mod shortly thereafter. I've always thought that maybe it was my CCRM and thought nothing of it. Well now that's it's summer here in florida I've tried to use the ac and found out that the compressor doesn't even kick on. My question is that i'm wondering if the CCRM controls the AC to or if there is a switch or something that went bad. Anybody have any ideas!!??

 

[HISSIN50]

if there is insufficient pressure in the system, the LPCS wont allow the A/C compressor clutch to lock up, ergo no fan.

 

[95Cobra302]

Well i put a recharge kit to it, and i get 45 psi at the low pressure side.

 

[Teknik]

This just happened to me, I am in FL also.
Check your voltage at the low pressure switch.
You should have voltage at both wires when your
AC is turned on. If it's good then the switch is fine.
If not, replace switch and problem solved.
If it's not the switch, check the voltage at the compressor,
the black and yellow wire, which is the bottom most one,
if no voltage then check pin #23 at the ccrm.
If you have voltage there but not at the compressor,
then you have a break in the wire harness somewhere.
To fix quickly, cut the wires to the compressor and
at pin 23 and 16 at the ccrm.
splice in your own wires from pin 23 to the black and yellow
at the compressor and from pin 16 to the black wire at the
compressor. the voltage just goes in a constant loop
from ccrm to compressor and then back to the ccrm.
I hope this is enough info for ya. Good luck man.
hope you fix it !!!

 

[HISSIN50]

Do you guys have a WOT provision external to the puter (like foxes have a WOT relay)?
On a fox, the WOT relay is in series on the power wire between the LPCS and A/C coil connector.

 

[mo_dingo]

Do you guys have a WOT provision external to the puter (like foxes have a WOT relay)?
On a fox, the WOT relay is in series on the power wire between the LPCS and A/C coil connector.

Yup. That is something that I forgot about.

I don't know how a/c system is wired. I know the 12V goes from the pressure sensor at the canister to the compressor, but I don't know if the WOT relay is inbetween that, or if it is before the pressure sensor.
Scott

 

[HISSIN50]

Thanks Scott (long time no talkie).

I thought that the puter might take care of it internally or that it was taken care of within the CCRM (other than fans and fuel pump, I am not sure what else is in the 'box'. ). Just like how SN puters have an integral BAP whereas foxes have an external BAP (adaptation from the MAP days).