Cooling fan staying on
Burning Brakes
Joined: Nov 2011
Posts: 841
Likes: 1
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Helps to mention the year model when asking questions
Many differences in systems across the years; esp in fan control
Engine in limp home turns on fans with key.
Pull the engine codes and see if anything showing
Many differences in systems across the years; esp in fan control
Engine in limp home turns on fans with key.
Pull the engine codes and see if anything showing
Last edited by rodj; Apr 2, 2012 at 07:30 PM.
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Burning Brakes
Joined: Nov 2010
Posts: 1,006
Likes: 2
From: Spartanburg South Carolina
The computer controls the Main fan with inputs from the coolant temperature sensor in front of the intake, vehicle speed sensor, and A/C system.
Start from the front and work your way back. It's not uncommon for a bad ECM to be the cause, that's what happened to me. There is a dark green wire w/ a white stripe that comes off of the main fan relay, this is what the computer grounds to turn on the main fan after it receives inputs from the above sensors.
When you turn your key to the RUN position without the car started, does the fan turn on?
http://forums.corvetteforum.com/c4-t...-start-up.html
Start from the front and work your way back. It's not uncommon for a bad ECM to be the cause, that's what happened to me. There is a dark green wire w/ a white stripe that comes off of the main fan relay, this is what the computer grounds to turn on the main fan after it receives inputs from the above sensors.
When you turn your key to the RUN position without the car started, does the fan turn on?
http://forums.corvetteforum.com/c4-t...-start-up.html
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Going by some of the recent questions I suspect many would struggle to change a tire
Burning Brakes
Joined: Nov 2011
Posts: 841
Likes: 1
or if he has the proper air pressure in his rear tires, the fan will start working
You're right though, I have seen answers like that to questions that had nothing to do with tires
Last edited by caddyboy84; Apr 2, 2012 at 09:38 PM.
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
to do the obvious checks like confirming gas in his tank ( not just going by the fuel gauge )
before asking why his car won't start
Burning Brakes
Joined: Nov 2011
Posts: 841
Likes: 1
Burning Brakes
Joined: Nov 2011
Posts: 841
Likes: 1
Ok ok........Lets not beat up on the "youngins". UHhhhh, what were we talking about again OH YEAH, FANS ON, try looking into a hung-up A/C relay first, then I would trouble shoot the A/C controlls. Sorry moo, we're just some old guys venting a little, you know the deal.
OH YEAH, FANS ON, try looking into a hung-up A/C relay first, then I would trouble shoot the A/C controlls. Sorry moo, we're just some old guys venting a little, you know the deal.
