I have not done the fan switch mod or anything but whenever i start my car i blow the fan fuse (20A) and i get an SES light. Any suggestions on how to fix t his?

 

Maybe you have a fried relay. Most of the relays are the same, so you can swap them around for testing (the fog light relay is a good one to pick for testing so you can see if the relay works for the fog lights). What year is the car?

 

I just checked the relay like you said... the fog light relay also blew the fan fuse. Is there any way i can check to see if the fans are working? I also i have a feeling that my brother took it through some pretty deep water (i found puddles beneath the 2 back seats) so i may have some type of short somewhere.

 

Does your brother hate you?

Did you try all the relays? (depending on year of your car, you may have 2 or 3) Instead of blowing more fuses, test the relays by seeing if they work for the fog lamps, instead. That will tell you if the relay is good or not.

Also try pulling all the fan relays out and then turning the car on to see if the fuse blows.

Maybe there is water in the fuse box.

 

Check the AIR pump too.. [that sometimes blows the fan fuse..]

 

That caused the fuse to blow on my dads squad car a billion times before the mechanic figured it out.

 

Good idea, but it depends on the year car it is whether the same fuse powers the AIR pump. I asked for the year of car, but seems he does not want to share. It is really hard to help someone without all the info. :blah:

 

Haha sorry i didnt see you asked what year car... its a 96 Z. There shouldnt be any water in the fuse box it has been dry for a while now i just hadnt had time to try to fix this.

 

Ok, the fuse does also power the AIR pump on that year and it probably is the more likely suspect, especially after any possible water contamination. Unplug the AIR pump and see if the fuse still blows. You may continue to get a SES light, though, because the pcm will not see the effect from the pump that it is expecting (pre-1996 cars can usually get away with the pump disconnected because OBD-I does not care as much as OBD-II does). Your options will be to replace the pump or have it programmed out.

 

Ok do i just unplug the AIR pump relay or do i actually have to disconnect the pump somewhere?

 

WORKS!

i pulled the AIR relay and left the fan relay in and it did not blow the fuse. The fans came on fine with the defroster so i assume it will work fine when the car warms up. Thanks for the help! you saved me a lot of time under the car

 

Either one will isolate it, as evidenced by your last post.