'90 Camaro with single fan will not come on when hot or when A/C is turned on. I have grounded the wire above the starter, checked the fuse, checked the fan. I found two fuseable links on passenger side at front of car but are either of these for the fan or relay. Also which relay should I start with when checking. Any help for what I am missing would be appreciated.

 

Well someone helped me out on this earlier this week.It was a little different.But i changed my relay today.On my 92 Camaro, the relay was on the driver side up against the firewall.There are two right next to each other.The fan relay is on the right side looking at them from the front of the car(or it's the outside relay).That could be what it is or it could be one or both your fanswitches.One is connected on the intake manifold right next to the t-stat housing.the other is on the passenger side on the block in between the last two spark plugs.it gets real hot where the second one is mounted so it may have a melted wire.That's what's goin on with mine right now.But my fan still comes on when i turn on my a/c.I hope this helps you out a lil.Good luck with everything

 

do you guys know where the cooling fan relay is?

 

That would be me.

And I'll try to help out in this thread too.


Sorry but that's a little wrong. Those two "things" in the intake and driver side head are temperature sensors, not switches. One is for the ECM and one for the dash gauge. They do not operate the fans (or at least not directly). No need to bother with these, they are not the culprit in this case.


So you checked the main fan fuse by the battery? The one in the single-fuse holder with red and orange wires? Good.

BigWill is hinting about a relay and it sure could be the problem. You could swap the two relays you have under the hood (on the firewall, by the brake booster, tucked away in the corner). One is for the fuel pump, one for the fan. They are both identical on your TBI engine. (ok, maybe different in color) If you swap them and ground the wire on the temp switch in the passenger head again, that'll tell you if the relay is bad. If the fan turns on (with key on), buy a new relay. If it doesn't, there is a wiring issue somewhere. Or possibly a blown fuse under the dash (there is a "FAN" fuse there).

Let us know what you find, we'll take it from there.
Lou

 

thanks! im movin down the road now....good stuff...i ran a switch to the ground wire in the fan relay (green with a white stripe) so i can turn the fan on and off when the car is on...hehe i like it, its fighter pilot type switch!