jcobra99

iTrader: (51)

I'm installing a perma-cool tranny cooler with fan tomorrow in series with my BM and have a few questions. I would like the fan to be running all the time during the summer. What would be the best way to wire the fan so that it only comes on when the car is started? I hear i should run a relay, How exactly do relays work and what circuit should i wire one off of. Any input would be greatly appreciated.

EDS01SS

iTrader: (30)

I just did this and used my air pump relay to run it all the time. Now if this is your everyday driver and you only wanna run it in the summer i would suggest just going with a switch to a relay and then to the fan. A relay works just like a switch pretty much but the relay is what will take the blunt of the amperage instead of the switch.

jcobra99

iTrader: (51)

So you just tapped off of one of the wires running to the smog pump relay on the back of the fuse -box? which wire was it? Color? location ect?
Is there any need to run an in-line fuse?

Fast Bird

iTrader: (1)

wondering the same question

meatman

iTrader: (20)

This is the best way to wire any accessory. Just a basic 5 terminal relay. With a switch on it all your doing is grounding relay to run the accessory so it wont burn up your switch either.

Austin@HPE

I used the fuel pump signal still ran the fan on its own relay but trigger wire from fuel pump. I figured if the fuel pump goes out the fan will be the least of my worries.

jcobra99

iTrader: (51)

Thanks everyone for the help. I tapped the gray ignition wire going to the fuse box and ran an in-line fuse for safety. I took some pictures of the complete fan install if anyone is interested for some pics on installing a large tranny cooler With fan.

smf_ss

I just installed my electric fan transmission cooler and have not wired it yet, I was wondering if I could have it kick on with the engine fan?

DailyGTO

That would not be a problem, just use a relay like they stated above. Just make sure to check the wire you use for triggering the relay whether it is a ground, or 12V. My car is not a GM, so I dont know if GM uses a ground trigger or 12v trigger for the fan. Either way, as long as you found a wire that changes states when the fan turns on, you should be good to go.