Someone in the board explained how to do manual switch and it's what i am trying to do one. So, it doesnt work for me, worse, i had broken something i think. I split the green\white wire on the relay on the right side(just on the left of the firewall), put a wire on it and i had ground it. So, the fan start, but when i have disconnected the wire from the ground, the fan dont stop. Then, (it is why i think i have broken something), when i turn on the key, the fan start to turn immediatly even if the car is cold. Is it normal? I dont think so. Since i touch the green wire, the fan doesnt start when i turn on the key.

What is the problem??? Someone can help me please, to do a manuel switch without broken anything. Maybe i do something wrong.

thanks,

p.s. sorry for my english!!!

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trans-am 91 3.08 posi 5.0 lb9 5 speed stock

[This message has been edited by stallone (edited February 17, 2001).]

 

With the key on, the fan will run as long as you have the green wire grounded. Put your toggle between the green wire and a ground.

 

NO, now, when the green\white wire is NOT grounded, the fan run.

What i do with that, i cut the wire green\white and i put i switch between to stop fan. Then, when i start the car, the switch is on and the fan run. I turn the switch off and on and the fan doesnt restart!!!!!! What is the problem, the relay????

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trans-am 91 3.08 posi 5.0 lb9 5 speed stock

[This message has been edited by stallone (edited February 17, 2001).]

 

Up, i really need your help! I have this problem with the car

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trans-am 91 3.08 posi 5.0 lb9 5 speed stock

 

Up, i really need your help! I have this problem with the car

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trans-am 91 3.08 posi 5.0 lb9 5 speed stock

 

Up, i really need your help! I have this problem with the car

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trans-am 91 3.08 posi 5.0 lb9 5 speed stock

 

At least yours is running...i tried to do this to my car today and now all of the sudden the car wont start...i didnt cut any wires so i dont know whats wrong.

 

man what are you guys doing? are you sure you are working on the right relay?

Does someone else know what could be going on here?

 

Yeah, i can't really help you here, what you're describing makes no sense. When that green wire gets grounded (key on obviously) the fan turns on.
Wait a second...didn't this whole thing start based on your fans weren't working. Maybe your relay is dead, or the wiring is fubared. I can't really think of anything off the top of my head to tell you to check though. Get a hold of a wiring diagram for teh coolant fan(s) (chilton's manual is OK for this), then go a head and test ALL the wires going into that relay (like see which is constant hot, switched hot, ground, and the green/white wire is switched ground by the ECM fan switch.) If they all check out OK then the relay would be suspect.
...ed

 

My relay was fine before...There was two green/white wires on two different relays right next to each other...so i grounded the first one and it didnt work...in fact the car wouldnt start all of the sudden...so then i grounded the other one and the fan turned on with the key "on" however the car still wont start...They could be two totally differnt problems that just ironically started at the same time i dont know. But all i know is i cant get the damn car started now.

 

Thanks for the reply, and now, this is the situation, this problem make me crazy!!!!

I will try to explain you exactly what i have done:

1-I have split the green\white wire
2-I disconnected the ground from the battery(to avoid any electric problem)
3-I put a wire from the ground of the battery to the green\white wire and the fan start to turn
4-after i have disconnected the wire from the battery.
5-i replace the ground on the battery
6-At this time, the car is like it was before...with a problem added
7-after this, when the key is "on" and the car is cold (normally, the fan is not suppose to start!) the fan start to turn.
8-so, what is the problem??? Is it possible that i have broken the relay because all the current go throught the relay because the ground from the battery to body was not in place???
9-The most bizzard thing is the following: to avoid the fan starting until the car is hot, i cut the green\white wire and i put a switch between. So now, sometime the fan start to turn, sometime it dont. Is it because the additionnal wire with a switch add more resistance and it is because the fan dont start to turn? If it is, why sometime it turn and other it dont???
10-In resume, this experiment cause me some problem without give me what i wanted in first place!!!

thanks for your help,

p.s. one more time, sorry for my english



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trans-am 91 3.08 posi 5.0 lb9 5 speed stock

 

up please


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trans-am 91 3.08 posi 5.0 lb9 5 speed stock

 

listen up stallone and others who are having this problem. What are you trying to accomplish? On the fan power do you want automatic control, manual or constant? If there is a problem with automatic control check fuse @ coolant fan relay(20 ga link)if thats ok go to fan motor leave car running and wait to see if fan comes on. If it doesnt grab a screwdriver and give fan motor a couple of taps if it starts then you know it was the fan motor. next go to coolant temp sensor(black&yellow wires) if it looks like crap buy a new one cheap use your discretion. also check power control module just follow that black and yellow wires backwards. Do you have heavy duty coolant option? if so locate sperate fan relay for that it should have a tan (or brown) and orange wires if that is ok and all grounds are fastened then your cooling system should be allright anydoubt's just brake out voltmeter or wiggys with led light. If you want a toggle switch to maually contol you must find a source of power and run that right to fan motor while everything else is hooked up. In othe words you dont have to cut in the ground wire of fan motor only the black/red the only ground you will need is from the source of power. If you want your fan to come on when you start your car you must find an accessory that stays on when car is on. I have done this mod to my car. #1 go to fuse box inside car #2 run a small gage wire through firewall drivers side and down to fuse box leave 2 ft. of slack DO NOT POWER YET #3 Run other end of wire neatly across back of motor (use those electric plastic tubes to insulate wire and hang the wire with quick ties) run along inside of bay neatly up around batter and over too fan motor. #4 cut wires from fan motor (black & red, black) attach inline fuse(30amp) to black and red line either near the fan motor or away(best stay away from fan area) hook other end of fuse link to the wire you just ran splice together. #5 take the black ground wire off of fan motor, splice and ground it somewhere if you can back towards battery. #6 make sure all conections are weather tight and heat protected use electrical tape around any wire exposed and use firemans hat for splices. #7 go back to fuse box and remove engine control fuse or fuel injection fuse. Run the wire up and in and slide the fuse back. If done right that wire will not fall out. #8 start her up and fan will come right own. mision accomplished. if you do this mod your heater will not produce a lot of heat. I use my car 2 seasons a year and we all know these f-bodys get mighty hot in summer and when racing thats why this mod works for me the cooler the better......I hope this helps a good day!

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Stallone, i still can't figure out whats happening even with your complete description. You have taken a VERY simple process and made it so complicated that i cannot attempt to troubleshoot it based on your description. ALL that you needed to do was ground the green/white wire going into the relay with 4 wires. The relay with 5 wires on the same bracket (also with a green/white wire) is for the fuel pump. Apparently you cut that one first, hence no start on your car. Simple enough mistake. But then you disconnected the ground to the car, but did ground the relay. I'm too cloudy right now to think of what that would do to the relay, but i can tell you one thing, it sure as hell wasn't going to make anything work.
What i was getting at in my other post is you are now at 'square one'. You may very well have fried your fan AND fuel pump relays. You may very well have fried any fuses/fusible links associated with those circuits. Any previously existing problems will STILL be there. Thats why i said now is the time to get a schematic and a test light and start doing some digging. You cannot take a single thing for granted as working now.
#1-make sure your fuel pump issue is fixed. With all the wires conncted to the relay with 5 wires does your car start. If not, you will need to figure out why.
#2-test all 4 wires on the fan relay. If all those voltages check out, then either the relay is bad, or the motor or some wiring betwen the relay and fan could be bad.
...ed

 

thanks guys for reply,

my fan motor run well, too much well because now, it run all the time when the key is on, and, I DONT PUT A GROUND WIRE FROM GREEN/WHITE WIRE TO THE BODY. It is not suppose to turn! so, it is why i cut the wire to put a switch. Now, when i start the car, the fan start and for stop it, i have to put the switch to the off position then to on.

What is the problem?


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trans-am 91 3.08 posi 5.0 lb9 5 speed stock

 

bad relay


by the way, are cars wired differently in Canada? maybe we should know this.

 

[This message has been edited by stallone (edited February 21, 2001).]

 

so, if the car is wire differenly in Canada, WHAT CAN I DO NOW:

1-for repair my problem
2-TO BE ABLE TO HAVE A MANUAL FAN SWITCH!!!!!

So if you live in canada, and you can help me, please answer my post.

thanks obd

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trans-am 91 3.08 posi 5.0 lb9 5 speed stock

 

up


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trans-am 91 3.08 posi 5.0 lb9 5 speed stock

 

no one have a car like mine???

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trans-am 91 3.08 posi 5.0 lb9 5 speed stock

 

I was kidding about cars being wired different in canada.

If you want to save yourself a lot of trouble, just wire the fan up using your own relay and thermostat. Take the ECM & factory relay out of the picture.

 

I read that you should ground the brown wire, not the dark green/whte to turn on the fans. Which is correct, what will happen if you ground the wrong one?

 

There is a possibility that your switch is bad. If you didn;t buy a strong enough switch, the insides could be "melted together" which would constantly run the fans. Try this, pull the wires off of the switch. Turn the car to acc and then touch the wires together. If the fans turn on and turn off when you separate the wires, you're switch is bad. I would recommend at least a 20amp switch for this application.

 

Hook it back up like it was and make sure both fans come on. If memory serves me right, The fan on the right is controlled by the computer and has a diffrent relay than the one on the left which is controlled by the switch in the rear of the right cylinder head. They work independantly of each other and need to be modified as such. Intermetent problems with rad fans are not uncommon.

If by chance your tapped in to the A/C relay than you might have the computer requisting the fans to be on. Also the defroster will turn it on too...

If your like my 90 then you have 3 relays, all side by side and all the same. Swap one with the one you have taped into and see if it corrects. If not then put it back like it was and see how it operates.

You should have a wire to ground to the new add on switch. Then the other side of the new switch goes to the relay. Keep the wires at the relay connected incase you forget to turn it on, That way they can still function. They just go to ground so It won't hurt anything