I have been reading all of the posts on how to make the fans run all of the time as long as the fan relay is grounded out. Now...I need some more info due to my make model and maybe some pictures.

The real question is, if I make my fans run all of the time, would it screw with my computer or my 02 sensors or anything? could I use a 160 or 180 degree thermostat if all my fans are constantly running? I mean, what are my options here?

1) Will I screw with the way my car runs if I make my fans run at all times?

2) If I do make my fans run at all times, should I use a lower temp thermostat?

3) If my fans are constantly running and I have an 160 - 180 degree thermostat, what temp will my car run at?

4) Where is the wire located that I need to ground out or hook to a switch? It is on a 1991 TA TPI 305. The battery is located on the driver side at the very front, making it hard to find the wires people are talking about in the other posts.

Thanks.

 

Here are some answers to help you out:
1) No, it will only make it harder for the car to warm up due to the fan running all the time.
2) Up to you, I would stick with a 180
3) Your car should run noticeably cooler due your fan being on all the time
4) There should be a black wire coming out of the relay. If not then use a test light and see which wires run hot (when fan comes on) or see which wire is the hot for the fan. The wire that is left over is the ground. I would run a switch on the hot wire coming from your relay to the ground. Just splice the hot wire to an accessory wire in your dash. Then put your own switch in your dash and run the hot to it. Then bypass the fan switch and run it to the relay.

Hope all that helps, let me know how it turns out.

 

thanks a lot jasman...do you know if I can just ground one of the wires out coming out of the relay and make the fans run all of the time?

 

you dont have to let the switch hinder your cars warmup. i installed a switch in my 90 rs. just wait to turn on fan after the car warms up a little. the only thing is, you have to remember to turn it on! its much easier to just turn it on right after you start it up so u dont forget, i guess. i am glad that i installed one in my old car, i noticed a big difference. i dont have one in my 91 because the installed dual LT1 fans(courtesy of previous owner) keep it plenty cool.

 

One thing about wiring the fan...you should wire the ground to the switch, not the hot. I had a very terrifying experience with the same thing. Started the car to go to work, warmed up for a couple of minutes, and then when I get to the end of the driveway, I flick the toggle for the fan. By the time I got 20 feet or so, I couldn't even see the winshield from all the smoke inside the car. Luckily I didn't have the wire tucked way up inside like I would have normally done, but I knew the "HOT" was just a temp for a few days. The wire (12ga) looked like a red hot poker, burnt all the insulation off.

Maybe I just have bad luck, I dunno.

 

So should I take the dark green/white wire coming from the primary coolant fan relay and ground it out to the frame or what? Will that make both primary and auxiliary fans run if I do so? Also, where is the primary coolant fan relay located on my car? 91 Trans Am 305-tune port injected. The battery is located on the drivers side at the very front.

 

also, does the relay also look like the fuel pump relay? I dont even know what I am looking for and if I am looking in the right place. thanks for your help and sorry for the dp

 

Just checked out a wiring diagram, hopefully its setup close to yours. First get a test light just to be safe then turn your key to the on position. The fan relay should be located somewhere near the battery. Once you've located it there should be an orange wire (12 ga or so with an inline fuse) going into it and a tan/white one that comes from your fuse block. There should also be a black/red wire that goes to your fan and a green/white one that comes from your ecm. Now, double check the tan/white one and see if its hot, it should be. If it is then turn the key off and ground the green/white wire to the frame. Now when you turn your key on it should run at all times no matter what. If you want to install a switch, find the fan wire in your fuse block and install a switch in your dash for it. Let me know if that works out for you.

 

My 88 Formula 305TPI has the battery on the drivers side and the 2 fan relays on the pass side, near the filter canister.

One relay is mounted to the fender and the other is mounted right next to the radiator.

I spliced a wire to the green wire on each relay and ran the two wires up into the car to two toggle switches, one for each fan, then ran the wires from the toggle switch to ground.


Look at this picture, to the left and right of my air filter are the relays, the black corrugated tubing going up the fender is where I have the 2 wires running, look at the brake booster, those 2 yellow wires are the wires as they go into the car,,

 

Awesome setup dude. can you let me know where you picked those switches up and maybe PM me some good detailed instructions on how you set it up and installed the switches. will i need to solder? where did you ground the switches out at? thanks a lot dude. i appreciate your help so much.

 

I got those switches at Advance Auto (general car parts store). Basically, you splice into the green wire on the relay, run that wire to the switch and then from the switch to any ground on the body near it, I just used one of the screws that screw into the metal frame of the dash near the switches.

I didn't use any solder, at the relay I used these blue in-line splices to attach my wires so that the original wires don't get messed up.
At the other end I put crimp on female spade connectors on the wires that attach to the switches.

For the switches to be mounted like I have them, I just used a Dremel tool to cut rectangular holes for the switches to sit in.

 

also, do the fan relays look like the fuel pump relay on the firewall by the brake booster.

 

My relays look like the fuel pump relay.

 

also bud, thanks for your help, do you have to reach for these relays from underneath the car? cause I couldnt find them...are they hidden inside one of the fenders? i should take a picture of under my hood and paste it here. but my car looks exactly like yours.

 

nope, both relays are right there, one on the fender and one next to the radiator.
I'll snap a pic tomorrow for you, gotta head out in a few minutes.

 

i would definately appreciate a picture if you could. i am lost going into this thing but i am sick of my car running at 230 degrees. thanks a lot

 

sorry for the dp, but does anyone have a picture of their fan relays on a 305 TPI model car, i cant find them. thanks. sorry again.

 

I'll get them tomorrow, had to much work and today it's raining.

 

Fender mounted Relay


Relay next to Radiator,


These are the relays on my Firewall,


just a pic of the motor from the side,

 

If you are having trouble with the relay wire up route, you could check into a different temperature switch that goes into the right side of the cylinder head. That will change the temps that your fan comes on at. Both Jet and Hypertech make them. They cost more but you won't have to cut your interior or do any creative wiring. A bonus is that you'll never forget to turn the fan on. Just a thought.

 

also when running the temp controlled relay you don't have the fan on al the time using energy when you don't need it to be used.
when that fan comes on it sucks lots of juice which makes the alt harder to turn and the engine has to work harder to make up for that.


this way it is only on when the engine is hot enough to actually need it to be used means better gas mileage and mo' power

 

thanks for the pics and the info. i will definately check out the chips.

 

Holy Thread Resurrection Batman!!!!!!!!!

I looked for an hout on my GTA. I found the primary relay under my air cleaner. It was never mounted when the car was built. No evidence of screw penetration on the pass. fender or the bracket. Love the quality control! LOL