Fans always on?
Safety Car
Joined: Jun 2006
Posts: 3,629
Likes: 28
From: FL
I would start by checking for fault codes, some DTC's do not illuminate the SES light but can cause the cooling fan to run whenever the key is on.
http://www.corvettephotographs.com/c4vettes/codes.htm
http://www.corvetteactioncenter.com/...993:+ECM+Codes
Could also be a stuck relay, good luck.
http://www.corvettephotographs.com/c4vettes/codes.htm
http://www.corvetteactioncenter.com/...993:+ECM+Codes
Could also be a stuck relay, good luck.
Pro
Joined: Sep 2003
Posts: 655
Likes: 2
From: Rio Vista ca.
A member here had a similar problem with his '93. He had a faulty low temp sensor I believe. I'm not sure if your '89 has the same set up, but you might want to contact Epimax1 to get the details of his resolution to the problem. He was very helpful to me on a recent lowering project on my '89.
Le Mans Master
Joined: Jun 2006
Posts: 5,642
Likes: 5
From: One day you're a Comet...the next day you're dust... Arkansas
Burning Brakes
Joined: Jun 2005
Posts: 1,188
Likes: 13
From: Wallingford Vermont
Check your AC pressure switch. Located on the AC hardline before the heater box. I knocked mine off accidently replacing some (spark) plugs. Thought my relay was hanging up, 'til I noticed the connector dangling on the passenger's side.
