Slim fan wiring... Driving me nuts!

[SasaniFab]

Ive searched and searched and everything ive tried hasn't worked and its driving me crazy. So I had to remove the oem fan because of the turbo setup etc. I wired the fans using this diagram and its not working. The fans run when connected to 12v, I replaced the thermo switch. I am getting 12v when the ignition is turned on to the green wiring going to the thermo switch. When I bridge the thermo switch plug I hear clicking in the factory relay. The passenger side oem plug has 4 wires, 2 wires connect to the thermo switch, one green and one black. The other two are blue and black I believe. I don't wanna use a rocker switch and want to use the factory therm switch. Any ideas would be helpfull

 

[bling5tatus]

Try swapping the fan relay with one of the other relays that's just like it to test if the relay is f'd.

 

[dustyboner]

the fan circuit already has a 30A fusible link and relay. there shouldn't be any reason why you would need to add another relay if you are replacing the stock fan for a slim one. your new fan maybe pulls 15A max, its probably closer to 10A.

this diagram is for 90/91 i don't know what year your car is but other years should be similar.
this shows
pin2 blue/red wire = (+) to fan
pin4 blue/black wire = (-) to ground
i would connect these wires to your new fan

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[bling5tatus]

For clarity this is the proper wiring for replacing the passenger side fan or the driver side fan? Sorry if that was already made clear but I may have missed it.

 

[BoostedTalonTS]

If this is a 1g, DustyB's factory diagram is correct. Your wiring is also correct (OP), however, I would move your aftermarket relay pin 85 to a chassis ground, rather than using the factory ground in the harness (just a personal preference).

What I suspect is going on is that you've also removed or replaced the factory AC fan, on the driver side, as well. -If that's true, you've inadvertently interrupted the factory wiring's resistor that is responsible for generating the Hi/Lo fan speeds. Since most aftermarket fans do not flow nearly as much as the factory fans, you're better off using them in full (high) speed only. -In order to do this (and to restore the disconnect in the factory circuit), you must reconnect pins #1 & 2 on the AC fan harness together, after eliminating the resistor on the AC fan. You can then use Pins #3 & 4 for a driver side fan, if you wish, on the same AC fan harness.

 

[dustyboner]

Passenger side (radiator fan).

 

[SasaniFab]

I feel like an idiot guys, because I was getting 12v at the thermoswitch I never checked the fuse on the battery terminal. I figured wrong. Fuse was blown, my fan operates perfectly now. Thanks for your help .

 

[donniekak]

Depending on the brand of fan you are using you may want to use the stock power wire as a signal for a relay with heavier wiring powering the fan.

I have seen spal fans melt stock wiring.