high speed fan doesnt work with a/c on

[94YellowStang]

My car runs cool with the a/c off, but whenever I use the a/c the car will get hot and stay around the M & A in NORMAL (city and highway driving).I checked under the hood and the low speed fan stays running with the a/c on but doesnt help cool the car down any.What do I need to check or fix?

 

[Nagash01WS6]

Time for a new radiator.

I noticed the 94 doing that yesterday.

 

[SeventyMach1]

Take a look at THIS THREAD. Maybe that will help. Have you done the fan switch mod yet?

 

[CManT1914]

You need to check for ground at pin 17 on the CCRM while the a/c is on. If it's not grounded, then you got some bad wiring. It's a light green wire with a purple stripe.

 

[HISSIN50]

FWIW, my wiring was bone stock when I got the car (from what I can tell) and only low speed comes on with A/C (some say that high-speed comes on with A/C). I like it this way because I dont worry about burning out the high-speed fan connector as much (I can switch High speed on if I need it).

Chris's info is spot on.
Good luck.

 

[94YellowStang]

wiring is stock without the fan recall and no I havent tried the manual fan switch yet.I will go check for ground at pin 17 and see what I get whenever it stops raining here.