bluehawk2

iTrader: (74)

I noticed that my fans won't turn on according to my fan settings. I have looked at it with my scan tool and when the car reaches the temp for the fans to come on, they don't. I have a slp manual fan switch and when I turn that switch on the car cools back down to normal.

What should i check to resolve this?



Thanks

im2fast4u98z28

iTrader: (1)

possibly a relay or a fuse?

SSNISTR

iTrader: (10)

Relay. Check both.

Blazingz28

iTrader: (5)

How would you go about checking a relay? I tried to put a fan switch on my buddies 95 firebird but he didnt have the c100 connector? There was just one over there and it wasnt the right one. Also he only has 1 fan not 2? Anyone know what I can do.

bluehawk2

iTrader: (74)

I figured it wouldn't be a relay since I can turn them on manually. I will check the fuses out, but how do you check a relay?

2001NBMZ28

Something else to try is disconnecting the switch and plug the stock connectors back together since it's plug and play to eliminate the SLP switch/harness. Are you getting both high and low speeds?

bluehawk2

iTrader: (74)

I tried unplugging the slp switch and that didn't help. I am getting both low and high speeds. All the fuses looked good, but I havn't checked the relays.

SSNISTR

iTrader: (10)

You can't see if a relay is bad, just swap it out with another....

2001NBMZ28

If your scan tool can command the fans on you can use this troubleshooting guide: www.gearchatter.com/viewtopic8947.php Have a buddy using the same relays that would let you swap them with theirs one by one?

bluehawk2

iTrader: (74)

Thanks for posting that link. I will swap the relays from my friend's car and see if that changes anything.


Thanks

bluehawk2

iTrader: (74)

Just replaced the relays and that didn't help. With the car sitting at idle the fans are blowing, but when I am riding around and the temp gets up I can turn the fans on high manually and it will cool down, but the computer will not turn the fans on high.


One question..............with a 180 tstat, hot warm will your car run? Mine is getting up around 210-215. That seems a little high to be driving around on a cool night.

SSNISTR

iTrader: (10)

Don't go by the gauge, it sucks.

Just because you have a 180 stat doesn't mean it won't ever go above 180....