manual fan switch

[gudz519]

I'm trying to figure out how to setup a manual fan switch i drive alot and when me and my friends stop i want to be able to throw the fans on. i have no a/c i dont know if that matters weird thing is my passenger side fan only comes on if i put my heat on instead of my a/c like most car i want to do it a safe way so i get no CEL i was wondering if someone could help me out thank you.

 

[Indian]

Do you have stock fans or slim fans? I wired my passenger side slim fan with a relay and toggle switch. I took a power wire from the battery to pin 85. Then I connected a wire from my toggle switch to pin 86,and another wire to the other side of the switch to a ground. Then I took a short wire splicing in jumping pins 85+30. The fan positive goes to pin 87,and the fan negative to a ground. Its a little different if you have stock fans.

 

[gudz519]

i have stock fans any ideas i was thinking about just using my passenger side fan since it dosent work with the ecu anyways

 

[92AWDHX40]

just wire your fans to one switch in the car, i did that before got a switch and wired the one together since i pulled my ac out long ago.

 

[my dreamt dsm]

I'm trying to figure out how to setup a manual fan switch i drive alot and when me and my friends stop i want to be able to throw the fans on. i have no a/c i dont know if that matters weird thing is my passenger side fan only comes on if i put my heat on instead of my a/c like most car i want to do it a safe way so i get no CEL i was wondering if someone could help me out thank you.

Isn't the passenger fan for the radiator and the driver side is for the a/c. You can use a girls bobby pin for their hair- strip the plastic so it's bare metal and disconnect the fan switch and stick the pin in there so the fan stays on loop. So every time car power is on the on position, it turns on automatically. No hassle of risking the ecu or anything.

 

[gudz519]

Isn't the passenger fan for the radiator and the driver side is for the a/c. You can use a girls bobby pin for their hair- strip the plastic so it's bare metal and disconnect the fan switch and stick the pin in there so the fan stays on loop. So every time car power is on the on position, it turns on automatically. No hassle of risking the ecu or anything.

ok im a little confused how would i do this sorry

 

[VelocitàPaola]

ok im a little confused how would i do this sorry

Don't worry about how to do it... it's a bad idea. The fans require a lot of current, so it's not a good idea to have them always on, especially while starting the car.

Having them on a manual switch isn't ideal, but it's not a terrible idea and it's easy to do.

Each fan has two speeds, high and low, and one relay for each speed (thus four relays total). Each relay has its own connection straight to the ECU. Find these wires and cut them. Take each end leading to the relays and connect it to a switch. Connect the other side of the switch to chassis ground.

I would only bother with the high speed relays, unless you want four switches in your cabin. You could theoretically tie the two high speed relay control wires together and control both fans with one switch, but I would use a pair of 1N4001 diodes to isolate the relays' coils. If you don't know how to do this, don't bother with it...

 

[gudz519]

Don't worry about how to do it... it's a bad idea. The fans require a lot of current, so it's not a good idea to have them always on, especially while starting the car.

Having them on a manual switch isn't ideal, but it's not a terrible idea and it's easy to do.

Each fan has two speeds, high and low, and one relay for each speed (thus four relays total). Each relay has its own connection straight to the ECU. Find these wires and cut them. Take each end leading to the relays and connect it to a switch. Connect the other side of the switch to chassis ground.

I would only bother with the high speed relays, unless you want four switches in your cabin. You could theoretically tie the two high speed relay control wires together and control both fans with one switch, but I would use a pair of 1N4001 diodes to isolate the relays' coils. If you don't know how to do this, don't bother with it...

thank you very well put

 

[greekgodchaos]

Simply put: take the black wire from the ground and ground it to the chassis, then take the power wire and run it to a 2 tab throw switch (I recommend one that holds 12v 20amps) and then run another wire to the battery that goes to the 2nd tab on the switch. thats how mine is set up and it hasn't failed me yet, but I only really use it when I'm not on the highway since they are supposed to be for low mph's only.