ted-hurst

I have a 88 Pontiac Formula with a 5.0 TPI/Auto . When I drive without the A/C on, the cooling fans work as like they should. The problem is the fans are not coming on when I turn on the A/C. Before, when I turned on the A/C both fans came on and ran and now they don't. I checked the fuses and changed the fan relay and still the same issue. Is there a switch in the compressor that turns on the fans? Thanks for any help.


Ted

Tootie Pang

iTrader: (2)

Yes but on my 1989, its near the firewall on the air con line. If this switch is bad, neither fan will come on during air conditioning.

ted-hurst

Would it be possible to get a pic of where it's at?


Thanks
Ted

Tootie Pang

iTrader: (2)

https://www.thirdgen.org/forums/cool...re-switch.html

ted-hurst

Found it thanks.

StevenB L98/LS1

What did you find or replace? I'm fixing up an 88 for a friend. The previous owner took out the A/C system so I put a new system on already and replaced the pressure switch on the dryer and the A/C blows cold but the 2nd fan isn't working with the A/C on either. The Fan operated when grounded, I replaced the relay as well. Having a hard time finding any short in the wiring. The only thing I haven't changed yet is the passenger side manifold fan switch.

Thanks Steven