Testing Aux Fan
Thread Starter
Le Mans Master
Joined: May 2003
Posts: 5,203
Likes: 0
From: Las Vegas Nevada
Testing Aux Fan
What is the best and easiest way to test the aux fan motor. when I first got the car it seemed to work but lately i have not heard or seen it come on. Any thoughts? I searched the archives for this but couldnt find it in any of the posts.
TIA :cheers:
TIA :cheers:
Racer
Joined: Apr 2003
Posts: 280
Likes: 0
From: edmonton ab
Re: Testing Aux Fan (Southern Comfort)
the best and easiest way to test aux fan: take to the dealer! :yesnod: :yesnod:
there is another way: disconnect the aux fan at the plug and attach 12 volts to the two wires leading the the fan motor. polarity is not an issue. the point is, does it come on when the leads are connected. view the result and similuate your opion.. :cool:
there is another way: disconnect the aux fan at the plug and attach 12 volts to the two wires leading the the fan motor. polarity is not an issue. the point is, does it come on when the leads are connected. view the result and similuate your opion.. :cool:
Intermediate
Joined: Jul 2003
Posts: 34
Likes: 0
From: Jacksonville FL
Re: Testing Aux Fan (Southern Comfort)
I had an 85 that the primary fan worked, but the secondary fan quit. I reversed the fan relay wires and the primary fan quit, but the secondary fan worked, so I bought a new fan relay and fixed the problem. Turn on the A/C and you will get power to both fan motors.
Thread Starter
Le Mans Master
Joined: May 2003
Posts: 5,203
Likes: 0
From: Las Vegas Nevada
Re: Testing Aux Fan (Vette 94)
when I switch on ac only primary fan works. so more than likely a bad relay or motor
where is the relay? Is it the one behind the battery?
[Modified by Southern Comfort, 12:32 PM 7/12/2003]
where is the relay? Is it the one behind the battery?
[Modified by Southern Comfort, 12:32 PM 7/12/2003]
Intermediate
Joined: Jul 2003
Posts: 34
Likes: 0
From: Jacksonville FL
Re: Testing Aux Fan (Southern Comfort)
There are two relays located on the side of the radiator on the drivers side. They are about 1 1/2 inches tall and will have clip on connections. Just unplug the wires and reverse which relay they are plugged into. Don't forget to reverse them back.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Racer
Joined: Apr 2003
Posts: 280
Likes: 0
From: edmonton ab
Re: Testing Aux Fan (Southern Comfort)
thr are two relays for fan control:
1. located left side between rad and power steering res
2. located left side fender just below the master res...this is the main
good luck ;)
1. located left side between rad and power steering res
2. located left side fender just below the master res...this is the main
good luck ;)
Thread Starter
Le Mans Master
Joined: May 2003
Posts: 5,203
Likes: 0
From: Las Vegas Nevada
Re: Testing Aux Fan (vettek50)
Here is the result.
Went to dealer and here is the scoop :on the 85
Aux Fan relay is behind Battery
Main fan relay is on rear of Drivers side wheel well
Aux Fan Switch is bet 6 and 8
I had a bad aux fan relay: replaced and works fine.
Will install 180 fan switch when the beast cools down.
Thanks for all of the input and help. It seems there was a lot of engineering confusion in the early years of the C4. Those were the LSD days of summer I think in the design room. :seeya
[Modified by Southern Comfort, 3:36 PM 7/12/2003]
[Modified by Southern Comfort, 3:37 PM 7/12/2003]
Went to dealer and here is the scoop :on the 85
Aux Fan relay is behind Battery
Main fan relay is on rear of Drivers side wheel well
Aux Fan Switch is bet 6 and 8
I had a bad aux fan relay: replaced and works fine.
Will install 180 fan switch when the beast cools down.
Thanks for all of the input and help. It seems there was a lot of engineering confusion in the early years of the C4. Those were the LSD days of summer I think in the design room. :seeya
[Modified by Southern Comfort, 3:36 PM 7/12/2003]
[Modified by Southern Comfort, 3:37 PM 7/12/2003]
- 1986 Original Owner -
Joined: Apr 1999
Posts: 3,193
Likes: 139
From: North Yorkshire, England
Cruise-In I Veteran
Cruise-In II Veteran
Cruise-In III Veteran
Cruise-In IV Veteran
Cruise-In VII Veteran
Re: Testing Aux Fan (Southern Comfort)
Steve,
I didn't realize you had started another thread. I replied to the other one. At any rate, you got it sorted and that's great. Also good info on the location of the Aux Fan Relay on the '85. Makes sense as you have a Burn Off Module in the cockpit and no Burn Off Relay behind the battery, you have room for the Aux Fan Relay.
I didn't realize you had started another thread. I replied to the other one. At any rate, you got it sorted and that's great. Also good info on the location of the Aux Fan Relay on the '85. Makes sense as you have a Burn Off Module in the cockpit and no Burn Off Relay behind the battery, you have room for the Aux Fan Relay.
Intermediate
Joined: Jul 2003
Posts: 34
Likes: 0
From: Jacksonville FL
Re: Testing Aux Fan (Southern Comfort)
Interesting info on where your relays are located. I had an 85 and both mine were located on the side of the radiator, the same place they are located on my 94. They must have moved them during the production year. Weird huh??? Glad it was a cheap fix.
- 1986 Original Owner -
Joined: Apr 1999
Posts: 3,193
Likes: 139
From: North Yorkshire, England
Cruise-In I Veteran
Cruise-In II Veteran
Cruise-In III Veteran
Cruise-In IV Veteran
Cruise-In VII Veteran
Re: Testing Aux Fan (Vette 94)
Interesting info on where your relays are located. I had an 85 and both mine were located on the side of the radiator, the same place they are located on my 94. They must have moved them during the production year. Weird huh??? Glad it was a cheap fix.
Anybody else with an '84-'89 with the fan relays mounted on the shroud?
Intermediate
Joined: Jul 2003
Posts: 34
Likes: 0
From: Jacksonville FL
Re: Testing Aux Fan (Ray Quayle)
I’m sure you are correct on the location, Ray. I had an 85 and a 93 at the same time. I must have been thinking about the 93 relay location. The “old” memory gets confused sometimes. I hate getting old. Thanks for clearing up the location deal.