93 corvette fan problem
Thread Starter
Heel & Toe
Joined: Sep 2002
Posts: 19
Likes: 0
From: St. Pete FL
93 corvette fan problem---PLEASE HELP!!
My fan isn't coming on in normal driving conditions. There are only two
relays beside the radiator and the haynes shows 3 for 88+ models. Is there
another hidden somewhere? I've also got a 94 Z28 with LT1 it uses three
relays to control the system so I was expecting 3. Anyhow both relays that
I can find are good and there is power to them both. Also, when I jump A
and B on the ALDL both fans come on. However, when you first turn the key
on none of the fans come on, or when the car is running the fans are not on
until you turn on the A/C. I also tested power to the relay and there is
power to both wires for each relay. The only thing wrong at the relays is
the computer is not sending the ground signal for normal conditions. (when
you first turn the key to power nothing) What would cause the fan not to
come on when you first turn the key or in normal conditions? My best guess
now until the engine cools off and I can test would be the temp sensor for
the fans. I'll test that soon but in the meantime, any ideas?" :nonod:
[Modified by redvettegirl*77, 5:16 PM 5/23/2003]
relays beside the radiator and the haynes shows 3 for 88+ models. Is there
another hidden somewhere? I've also got a 94 Z28 with LT1 it uses three
relays to control the system so I was expecting 3. Anyhow both relays that
I can find are good and there is power to them both. Also, when I jump A
and B on the ALDL both fans come on. However, when you first turn the key
on none of the fans come on, or when the car is running the fans are not on
until you turn on the A/C. I also tested power to the relay and there is
power to both wires for each relay. The only thing wrong at the relays is
the computer is not sending the ground signal for normal conditions. (when
you first turn the key to power nothing) What would cause the fan not to
come on when you first turn the key or in normal conditions? My best guess
now until the engine cools off and I can test would be the temp sensor for
the fans. I'll test that soon but in the meantime, any ideas?" :nonod:
[Modified by redvettegirl*77, 5:16 PM 5/23/2003]
Le Mans Master
Joined: Apr 2001
Posts: 7,411
Likes: 253
From: Little Elm TX
Re: 93 corvette fan problem---PLEASE HELP!! (redvettegirl*77)
From what I've read it doesn't sound like you have a problem. Is the car overheating? The fans aren't designed to come on unless your over 228°. The second one doesn't come on unless it goes over 236° or something. (stock) They will come on if you turn the A/C on. If you tested them and they both work, and you've seen that they come on when the A/C is on, then I think you're alright.
