I was thinking instead of using a toggle for the power, could I use a toggle on the ground wire? Could my fan handle the amps the bat puts out? I an going to bypass the ecm altogether.
The problem is that I seem to keep on burning out the toggles I use. That is why I am thinking about rewiring the fan.

What I have planned on doing is installing the power wire from the bat to the fan and the using the toggle to break the gound. I think if I remember right by breaking the ground it will break the current flow.

 

The fan pulls a lot of power and it is burning the switches up. The switch will still burn up on the ground side because it will still have current flowing through it. The proper way to do this is to use a relay which uses a low current to operate an electrical switch that has the higher current for the fan.

 

It was a thought. Thank you.

 

yeah that why relays are in cars because the most switches will burn up, they can't handle the amps the same way the relays can, and they aren't that hard to wire up.

 

I plan on making a trip to radio shack tomorrow and looking for one. I just hope I can figure out how to wire it in. Till then I guess the light switch will have to work!!

 

Just go to a junk yard and find a car (I would try and find a Camaro) that has a relay on it and get it along with the pig tail to go with it and wire it in. Just remember what type of car and year so you can replace the relay if you need to down the road. Also do a search on wiring upa relay as well as the wiring schematic for a Camaro.

 

Why waste time at a boneyard. Stock fan relay part # is 14089936. It can be had for 16 bucks at the dealer. You can purchase the socket at Pep boys and then it will be easy to remember what's what. A standard bat handle toggle generally is only good for about 5 amps or so. The electric fan can pull as much as 15 or so at start up and generally runs at 6-8 amps. Relays are used when high currents are needed and the switch size would be impractical. By the way, where is your stock fan relay? You probably have one. 305 models were not ECM controlled, the fan switch in the block controlled the fan relay directly without the aid of the ECM.

 

I know there is a relay on the firewall driver side. That controls when I turn on the ac, the fan kicks on. Other than that relay I am not sure where the others might be.

 

If you find an electrical schematic for your car you should be able to find the same lead to the existing factory relay that the A/C grounds to turn on the fan.

If you wire your toggle switch to this same lead and ground the other side of the switch, you will be able to turn on the fan through the existing factory stuff.

I've done something similar, I have a car that was originally a V6 and I'm using the factory relay and wiring.

 

i agree with rustydawg

i justed use the factory fan wiring, and just put a regular plain old toggle switch somewhere inside my car.. one of the wires going to the switch it just a body ground, the other goes to the tan wire which is the same wire my fan switch in the block goes too..

when the factory fan switch gets to the certain temp it grounds the relay and the fan turns on..

so using the switch spliced intp the same wire, when you flip the switch the fan will come on..

no burning anything, everything is aok!

 

That is something I will have to try. I think that will be easier than tring to wire in a relay. I just had an air dam made, bad @ss, it was done out of metal. It is longer than the factory but instead of going with the 90*angle on it I went with more of a 70*, and the extra lenght made it as long as a 90* would be. I will be installing it this weekend. Can't wait!! Thanks for the help guys.