Cooling fan terminal help!
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Junior Member
Joined: Aug 2013
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From: Farmington, Maine
Car: 1984 Pontiac Firebird S/E
Engine: LG4 305
Transmission: Borg-Warner T5
Axle/Gears: 3.73
Cooling fan terminal help!
Hey everyone, I had a quick question about my fans. I am wiring a relay and the guy who wired it before botched the thing so my question is... On the two bladed terminal on the fan, which side is positive and which side is negative? Thanks!
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Car: 1989 Iroc-Z Camaro
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Re: Cooling fan terminal help!
The two terminals connected to the fan will spin it either one way or the other when you switch the wires around. Try it one way and watch the way it spins. If its spinning the wrong direction switch them around.
Heres the relay =
Heres the relay =
Last edited by Ron U.S.M.C.; Sep 30, 2013 at 02:58 AM.
Thread Starter
Junior Member
Joined: Aug 2013
Posts: 57
Likes: 0
From: Farmington, Maine
Car: 1984 Pontiac Firebird S/E
Engine: LG4 305
Transmission: Borg-Warner T5
Axle/Gears: 3.73
Re: Cooling fan terminal help!
Thanks for the advice. Unfortunately I totally fried my wires running from both my separate relays on the switches inside the cabin of my car. Maybe you could tell me why they melted... I'm powering my relays(40amp) directly from the battery with a 40 amp fuse in each line. But I used really small wires on my ON OFF(20 amp) switch. My switch ground and 12 volt switched power completely melted about 10 seconds after I turned my ignition on. Is that because of my fuses? or a short? or wires that are too small? I could really use some help with this...
Thread Starter
Junior Member
Joined: Aug 2013
Posts: 57
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From: Farmington, Maine
Car: 1984 Pontiac Firebird S/E
Engine: LG4 305
Transmission: Borg-Warner T5
Axle/Gears: 3.73
Re: Cooling fan terminal help!
How ever the switches did work, they actually turned the fans on off...
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From: Mooresville NC
Car: LOWERED ♦ CRIMSON METALFLAKE
Engine: ► 400 KUBES ◄
Transmission: 765R4
Axle/Gears: EATON POSI 4.56
Welcome To The Fan Club
It sounds like the switches were switching power.
A fan switch is not supposed to switch power in this case, its supposed to switch control voltage.
A fan switch needs to apply voltage to the COIL of the fan relay.
Thin wires in the control voltage circuit is fine.
Therefore you probably had it wired wrong.
Were you using a standard automotive relay as pictured by Ron?
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If Your Communications Antenna Is Not Shaking At Idle, Your Cam Is Too Mild
A fan switch is not supposed to switch power in this case, its supposed to switch control voltage.
A fan switch needs to apply voltage to the COIL of the fan relay.
Thin wires in the control voltage circuit is fine.
Therefore you probably had it wired wrong.
Were you using a standard automotive relay as pictured by Ron?
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Happy Racing!
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If Your Communications Antenna Is Not Shaking At Idle, Your Cam Is Too Mild
Thread Starter
Junior Member
Joined: Aug 2013
Posts: 57
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From: Farmington, Maine
Car: 1984 Pontiac Firebird S/E
Engine: LG4 305
Transmission: Borg-Warner T5
Axle/Gears: 3.73
Re: Welcome To The Fan Club
I was using two separate 40 amp headlight relays with 40 amp fuses running from my battery. For my switched power I was taking it from my ballast resistor connected from my ignition coil. I used bigger wires a second time and fried my fuseable link connected to my starter. I don't know what to do anymore.
Supreme Member
Joined: Jan 2006
Posts: 3,341
Likes: 10
From: Mooresville NC
Car: LOWERED ♦ CRIMSON METALFLAKE
Engine: ► 400 KUBES ◄
Transmission: 765R4
Axle/Gears: EATON POSI 4.56
Welcome To The Fan Club
Probably starting from scratch is the best way.
Remove all wiring you have done and follow the diagram posted by Ron.
Because you have 2 fans you will be using 2 of the posted circuits.
They will be independent.
As you wire it in test what you have after every connection.
If you run into a situation where the test causes a fuse to blow, or a wire to get hot, you will know you have made a wrong connection.
Frying a fusible link means you probably had power shorted to ground, instead of the intended location.
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
Happy Racing!
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
If Your Communications Antenna Is Not Shaking At Idle, Your Cam Is Too Mild
Remove all wiring you have done and follow the diagram posted by Ron.
Because you have 2 fans you will be using 2 of the posted circuits.
They will be independent.
As you wire it in test what you have after every connection.
If you run into a situation where the test causes a fuse to blow, or a wire to get hot, you will know you have made a wrong connection.
Frying a fusible link means you probably had power shorted to ground, instead of the intended location.
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
Happy Racing!
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
If Your Communications Antenna Is Not Shaking At Idle, Your Cam Is Too Mild
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