question about fan wire mod..
The fan relays have two wires from the PCM. One triggers low speed, the other high speed.
In low speed, the relays feed the fans in series and each fan sees half voltage. In high speed, the are paralleled. each fan sees full voltage.
The fans are held off when the engine is cold or the vehicle is traveling above 30 MPH or so.
The system works pretty good as is. Why do you want to change to manual control? What mods does this car have? Do you still have A/C?
In low speed, the relays feed the fans in series and each fan sees half voltage. In high speed, the are paralleled. each fan sees full voltage.
The fans are held off when the engine is cold or the vehicle is traveling above 30 MPH or so.
The system works pretty good as is. Why do you want to change to manual control? What mods does this car have? Do you still have A/C?
yes u can. i have it in 2 switches. its VERY EASY to do... and this guy ^ helped me with it once too. to be honest it was a VERY useful thing to do. sitting in traffic and watching the temps go up isnt a good sight although there is nothing to worry about lol. i dont see why you want it in 2 switches but anyway all you need is 2 on-off switches, the diagram from electronics section and some tape. there are 2 wires that triggers the fans blue and green. hack them and wire them to where you want to mount your swtiches and then ground each one separately. i can take photos if you want to. doing them this way WILL trigger you ses light.
Trending Topics
Paul, take no offense bro, I was just simply asking if 2 switches would work. All the ones I've seen done were on 1 switch.. just simply wanted a straight answer if 2 switches would work..
Now, I'm assuming they will both come on by themselves with the switches off. Will the lights come on when the fans turn on?
Now, I'm assuming they will both come on by themselves with the switches off. Will the lights come on when the fans turn on?
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo No offense taken.
I agree, it's good to run the fans while staging at the track to cool the motor.
Having said this, it won't help unless you've replaced the thermostat to say a 160 degree unit.
Don't forget to shut the fans when the tree says go.
As I recall, the PCM grounds wires to the relays causing them to close thus sending power to the fans.
You should be able to simply ground these wires while keeping them connected to the PCM and the fans will operate. This way, the PCM will still have fan control when you're not at the track.
I agree, it's good to run the fans while staging at the track to cool the motor.
Having said this, it won't help unless you've replaced the thermostat to say a 160 degree unit.
Don't forget to shut the fans when the tree says go.
As I recall, the PCM grounds wires to the relays causing them to close thus sending power to the fans.
You should be able to simply ground these wires while keeping them connected to the PCM and the fans will operate. This way, the PCM will still have fan control when you're not at the track.
