I currently have a 86 firebirdtrans am the problem is i have an electric fan that is wired to a switch, i was wondering how i could wire it to my ignition wire instead of my battery.....and is it a good idea?

 

Why ?
What are you trying to acheive? Does it have a relay in the circuit or direct from batt too fan

 

The switch is better than constantly on as it will burn out shortly

Use a temp switch for automatic control, summit carries them

 

i wanted to have the fan turn on when the car starts up...and it is currently running straight to the battery....

 

i keep forgetting to hit the switch when i drive..its really annoying...i would like it to come on when the car starts so i can skip the hassle of cooking my engine

 

do you have a carb or tpi/tbi engine?

if you have a tbi/tpi , you can use a switch in your console
with a negative wire and hook these up on your original wiring on the fan relay!

if i remember it hase a 4 wire relay and you must bypas the green/white
wire with a negative wire/switch.

my relay was located on de passenger side behind the headlight!

do you have one or two electric fans?

please tel some more info about your car!

dennis

 

 

i have an 86 firebird trans am with a 350 short block...someone removed the airblower(for exhaust system) and the interior was in shreds when i got it....i bought it for 350$ though so i cant complain.....but wouldnt the gauges fuse only be activated with the lights? and also my speedometer is broken....and i think the RUn wire would be most efficient..

 

 

But a smart person would not run the fan direct off that fuse ; too much current draw through the circuit.
You need a relay

 

the gauges fuse wire is located where??

 

Simply grounding the dark green/white ECM wire will set the fan to turn on with IGN power. The fuse is shared with the ALT which receives IGN power from the fuse block

 

 

ok i will take your advice its been raining lately so i will have to wait...what if i run it to the alternator?? just asking

 

He has yet to confirm that he actually has a relay in place.
His OP states
"have an electric fan that is wired to a switch"

 

yea no relay just fan with 2 wires coming out....one a positive one a negative and the switch....

 

Good way to melt a switch

 

The Short Answer:

The Long answer:

Do not simply splice the Fan into a "Switched Power" or "INGITION" or RUN" wire. The Fans usually get a dedicated 25 fuse in the fuse box and splicing into some random "Fat Pink Wire" is not advisable. ( at least check to see if a Fan fuse is present and working into your fusebox, If so than use it as your power source ! ) As it is currently wired you will forget it and the engine will cook. If you wire it to an ING wire (usually pink) than the fan will operate at all times and your 350ci will hardly ever reach operating temp.

Go with a Block mounted sensor,.......

 

As a reminder, get yourself one of those rocker switches that have an LED light on it, that way if you see no light, then the fan isnt on.

 

Get a voltimeter and start checking each fuse with the highest amperage. Note down the ones that are HOT with key to ignition. Then put key back to off position. get back under and check if the HOT fuses are now off. If you find one that is off when off, and one that is HOT when switched to ignition, then your good to go.

 

Come to think of it, I think it would be better to go the relay route. I need to rewire my fan. Forget that post that I posted. It was bad to begin with. Pocket, vettoz, and NINA; you guys gave me a . My next mission, hook up my fan wiring correctly. Thanks guys.

 

well where to get a relay?? and is there anyway to get this solved without spending money??

 

Relay= Autozone
Freebee= look at the picture. I highly advise you that this is theeeeeee wrong thing to do, but since you need a free jerryriged job, then here you go.

 

You realise as per you scribble that if he twists the wires together the fan will run full time even with the key off?

 

Yes but if you don't spent $$ on a relay then you risk burning your car down which could cost more than the relay and a bit of wire

Why?

 

Yup. Thats Y I mentioned to install a toggle switch. I did mention "I highly advise you that this is theeeeeee wrong thing to do, but since you need a free jerryriged job, then here you go."

The guy needed a freebee so I gave him one. I understand the consiquences but all that Im doing is giving advice,,,bad, easy, free and extremely lazy workmanship. I see it this way, he needs the cheesiest way to work his fan right? Well it's his car, not mine. Im sure he's aware of the reprecussions but its his choice. I also mentioned about going the relay route. I gave supported the lazy cheap way, and the time consuming right way.

 

....Thats the stupidest idea i ever heard.... anywho i will go with the relay

 

Please keep the bad comments to yourself. We are here for good quality advice, and maby bad quality advice depending on the member with the issue. Do you have a better method? Keep it clean. No swearing or negative comments. Besides, you wanted the the cheapest route and I gave you the cheapest route.