I just finished up my manual fan switch install. When i checked to make sure everything was working properly I always turned the key all the way till the "Service Engine Soon" light would come on, which is right before cranking it.

So everything is working fine, LEDs are good, the High fan comes on and the Low fan comes on, everything is good. So I put it all back together and test it again, works fine. Then when i crank the car up to move it suddenly the right LED light comes on and stays on I turn the car off and turn the key till before it starts up and the LEDs work fine again, the only time the right LED doesnt want to function properly is when the car is running

Any ideas?????

 

Was it your low or high speed LED that was on? If your fan was actually commanded on by the pcm (not by your switch) the LED will come on. IOW, the LED will come on any time the fan is on, no matter if you turn it on or the pcm does.

I guess the real question is, "was the fan really on when the LED was on?".

 

Alright, I just learned that the LEDs will come on when the pcm tells the fans to come on. But I guess i have a wiring problem because my LEFT LED should be on when i first start the car up rather than the RIGHT LED. Cause when its in low the right LED is on and if i hit the switch to the left to turn on LOW both LEDS are now on when only one should be on.

And when i switch it to the right both LEDS are on for HIGH which is correct...

So if you know where i screwed up to have the RIGHT Led on when the LEFT led should be the only one on?

Get what im saying?

Start Car: Right LED on
Switch left for low fan: Left LED is lit so now BOTH Leds are on
Switch right for high fan: Left LED is now lit and Both Leds are on as they should....

So im just trying to figure out why the right led is on rather than the left.... sorry for repeating myself, i just confuse myself sometimes lol

 

My first guess would be that you wired the LEDS backwards or placed them backwards on your panel. You have to remember that on the back of the switch, the terminals on the opposite the side the toggle is on, are the ones that make connection. Maybe that is confusing.

 

Still problems

When the car is in the ON position but not running. The LEDs work fine. I click the switch to the left, the left LED is on (low fan) when i click it on the middle, the LEDS are off. And when i click the switch to the right, BOTH LEDs are on.

BUT then when i crank it up all of a sudden the right LED comes on. Then when i click the switch to the left BOTH leds are on (low fan) . and when i click it to the right both Leds are on again (high fan)

so confused

Basically, everything works PERFECT when the car is not running, but when i start it up, then it messes up

 

What diagram did you use to wire it up. Was it like this ? Your symptoms don't seem to match the need for the diodes, but sometimes they are needed to make the LEDs work right (usually when one stays on when the key is off).

What are you using for a power feed?

 

What i need to know is why when I start the car the LEFT led is off and the right LED is on and the fans are on LOW... and when i click it left for the manual LOW the LEFT LED is now on like its supposed to, but both LEDs are on... same for the right (high fans)

im confusing myself, and probably everyone else reading this lol

 

I used that diagram but did not use diodes, I do have 3A diodes though.

Im using the radio power and the radio ground for the LEDs

 

Cant you just ** Hot wire ** to the fan? I have done it before on different vehicles with no problems is th Camaro different? I am new to Camaros first one I ever owned used to own 1991 Mustang GT. So just wondering thanks.

 

I would go over your wiring carefully.

 

Using the relays to operate the fans is a much better way, IMO. Sure, you can hot wire about anything, but switching a low current ground for relay control is a lot better than having to switch high current 12v power (again, MHO).

 

Shoebox will it ruin the fans by doing that? ** Hot Wire ** could you explain the low ground thing. Thanks

 

My vision of "hot wiring" is what I have seen people do to run 12v power through a switch and to the load side of the relay (the load side is the side where the relay contact connect power to the fan from the battery). What you have to do is use a plenty big wire to carry enough amperage to run the fan(s) and loop it into the passenger compartment so you can put a switch on it. You are taking a high amperage power wire and running it into the passenger compartment, risking shorting it out on the body putting strain on a switch that has to connect high current loads. You must also run a big enough wire so there is not a voltage drop that will ruin your fan motors.

Using the relay, you make a manual switch to do the same thing that the pcm does to engage the relay. The pcm sends a ground to the relay on a small wire (only about 22 ga). The coil side of the relay takes very little current to operate. Using a ground is safe and you don't have to worry about it shorting out to the body of the car.

Fan schematic

 

I looked at my relays under the hood none are marked with anything is there a way to determine which one it is??

 

So what exactly is the point of a manual fan switch? Shoebox, my fans don't seem to be working at all, any idea what the problem could be, and would a manual fan switch solve the problem? Thanks