irocchenault

what do i do about my fans never turning on. the only time i have ever heard them or seen them come on is when i turn the a/c on. during traffic jams and slow traffic or just idling somewhere my cars temp sky rockets, until i turn on the a/c and the fans kick on. any ideas?

harner

iTrader: (16)

Is it tuned? Do you have a 160* thermostat?

You could get around it by installing a fan switch.

irocchenault

it's not tuned and as far as i know it has the stock thermostat still.

HoLLo

iTrader: (17)

Mine got extremely hot in the summer time at red lights at stuff. When I got my car tuned I had them tune my fans to turn on earlier. Ever since it runs cool as a breeze even sitting idle for a long time

irocchenault

i live in hawaii, so it's 75 everyday. and where can i get a quick tune to fix that

IronOutlaw

iTrader: (4)

If they arent turning on at all I doubt it is in the tune, they are supposed to turn on at around 220 i belive. You can get a mailorder tune or an email tune since you are in hawaii. If there is a shop around you they may be able to do it.
Worst come to worst a Hypertech handheld lets you change your fan settings.
Personally I'd wire up a cheap switch and see if that fixes it.

In my 94 I ran a wire under my low fan relay and grounded it between my brakelines. It was a little ghetto, but i ran it like that for a year and the fans would run when i had the ignition switch on.

irocchenault

how exactly do you wire it. you can't go from battery, to switch, to fan, back to battery can you?

IronOutlaw

iTrader: (4)

Im not sure how to wire the switch, I believe there may be a right up on shoeboxes website though. Like i said I just grounded out one of my relays.
Doing this will fix the problem but if you want it "fixed" you may have a problem elsewhere, the fans should be coming on by themselves.

Try testing your relays and see if you can make the fans come on like they are supposed to. I switched mine around with my a/c relay because I knew it was good.

irocchenault

switching them around with the a/c relay will make them run all the time? right?

IronOutlaw

iTrader: (4)

All you are doing when your switch it around is finding out if the relay is bad or not. If it is bad, and the fans come on at 220 degrees or whenever they are supposed to come on stock, then you can go buy a new relay to replace it.
Changing relays wont make the fans run all the time though, just when they are set to run from the factory.

irocchenault

oh ok, so switching relays, do you just unplug and replug or how does that work. or do you follow the wires or is there a diagram i can follow?

IronOutlaw

iTrader: (4)

Yes, the lid on the relay box has a diagram that shows what each relay is. They just pull out and push in, just be kind of careful with them.

I suggest the A/C relay because you know it is good and you dont need it to run the car. Try switching it with the low speed fan relay and see if they will come on then.

irocchenault

ok i thought you were talking about unpluging the fan wiring and **** like that. that's definitely alot easier. and i guess there are 2 fan speeds? is that why there's 2 fans?

IronOutlaw

iTrader: (4)

On some year models both fans run at the same time at a low speed and then a high speed if the engine gets too hot. Im not sure on the temps that they are supposed to run though. On other year models one fan will run and then the other will kick on when it gets too hot.

EDIT: I just had a better idea, take your relays out of the fan slots and put them in the A/c slot and see if the A/C kicks on, that will be a lot easier and quicker than trying to wait for the fans to kick on with the a/c relay in.

irocchenault

neither one runs ever unless i turn on the a/c. then they both run. ill check out the relays. thanks for the help outlaw.

joelster

Thanks for rubbing it in. It's 19 out where I live.

Your best bet is a 160 stat along with a tune.

Raven02TA

iTrader: (11)

more than likely the relays went bad... i had both of mine go bad at the same time in my ta and i had the same problems as you described... might want to just look into replacing them

eagle_eyes

iTrader: (1)

i didn't know the fans still turn on with the a/c if the relays are bad?

here's some wiring for ya, irocchenault.

http://shbox.com/1/fan_schematic_1995.jpg
http://shbox.com/1/schematics_wiring.html

RamAir95TA

iTrader: (2)

How hot does your car get? The low speed fans don't come on until 227 degrees.

bobdec

The computer (PCM) runs the fans from the temp signal off the sensor on the WP. Depending on car early '94's and earlier have two relays and run 1 or 2 fans. Later '94's and up have three relays and run both fans on low or both on high speed. Low or fan 1 signal is at 225* and high or fan 2 signal is at 235 (pretty high on the gauge). Also when the PCM sees A/C refrigerant pressure from the A/C sensor switch it sends the low speed signal to the fan relays, just the same as it does when it sees 225*. Therefore if the A/C runs the fans on low (3 relay system), or fan 1 (on 2 relay system) the relays are working. The fan switch modification dummies up the low/hi picks from the PCM, but the relays still have to work. Cooler T-stat won't help unless you reprogram the fan turn-on, have you waited it out to see if they really come on at 225-235* maybe your temp sender for the gauges (in the head) is bad and reading high. Is this thing boiling over or just looking hot ?