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Fans wont shut off no temp reading.

This is a discussion on Fans wont shut off no temp reading. within the Camaro / SS forums, part of the Vehicle Specific category; I started her up to move her around yesterday, when both fans came on and wont shut off. Temp guage ...

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    Unhappy Fans wont shut off no temp reading.

    I started her up to move her around yesterday, when both fans came on and wont shut off. Temp guage will not rise with engine heat. I changed the temp switch and still nothing. Engine is NOT over heating no SES light.. Coolant level is perfect no air trapped.. Suggestions?

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    Is the HVAC system totally off?

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    This morning I went out fired it up and even when the engine is cold from sitting over night the fans come on. I also noticed while I stood there that the fans began to increase in rpms to the point where they almost sounded like they are both running too fast.

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    Quote Originally Posted by pajeff02 View Post
    Is the HVAC system totally off?
    Yes. I thought it might be a AC switch issue but alas no..

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    Other than the coolant temp switch and HVAC system, there are no other mechanical controls for the fans that I know of. Has to be a faulty relay, wiring or PCM issue then, doesn't it?

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    Quote Originally Posted by pajeff02 View Post
    Other than the coolant temp switch and HVAC system, there are no other mechanical controls for the fans that I know of. Has to be a faulty relay, wiring or PCM issue then, doesn't it?
    I had that feeling. Because I switched out the relays swapping one for the other and as soon as they'er plugged in the fans still came on.. Both curcuits are energized..

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    Do you have an electrical schematic for the fan system?

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    Quote Originally Posted by pajeff02 View Post
    Do you have an electrical schematic for the fan system?
    Yes

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    Looks like you found your project for the day! I have to get back to my closet door installtion. I'll check in later to see what you find.

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    Quote Originally Posted by pajeff02 View Post
    Looks like you found your project for the day! I have to get back to my closet door installtion. I'll check in later to see what you find.
    Bad #3 relay.. I pulled 1 and 2 swapped them and had the same condition. Tapped on #3 and the guage shot up to normal and the fans turned off.. We'll see if it returns with a new relay..
    Last edited by Smittro; 01-01-2011 at 08:50 AM. Reason: brain fart

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    Last edited by Smittro; 01-01-2011 at 08:47 AM.
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    Wow, makes ya want to carry 3-4 spare relays in the car at all times doesn't it? I Would hate for one to decide to quit while 100's of miles from home. Especially one that is critical,,,like a fuel pump

    Glad it was an easy fix.

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    Cool! Now you can get back to work on your other project -- you are on a 6 month countdown.

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    Quote Originally Posted by Firebirdjones View Post
    Wow, makes ya want to carry 3-4 spare relays in the car at all times doesn't it? I Would hate for one to decide to quit while 100's of miles from home. Especially one that is critical,,,like a fuel pump

    Glad it was an easy fix.
    I already keep a serp. belt and a spare wrench to fit it, 1 quart of oil, and a bottle of anti freeze..lol

    Quote Originally Posted by pajeff02 View Post
    Cool! Now you can get back to work on your other project -- you are on a 6 month countdown.
    .....and the Camaro project comming too..

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    Quote Originally Posted by Smittro View Post
    I already keep a serp. belt and a spare wrench to fit it, 1 quart of oil, and a bottle of anti freeze..lol
    That's funny cause when I owned a Ford, i used to carry half my garage around. Now its like you said,serp belt,spare tire,jumper cables,water. And I really carry the water for other people.

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    Quote Originally Posted by Smittro View Post
    I already keep a serp. belt and a spare wrench to fit it, 1 quart of oil, and a bottle of anti freeze..lol
    You sound like me. On long vacation trips I'll pack the belts too, as well as a tool kit for small things. I also keep a couple of spare relays in the car, as well as the laptop to diagnose any check engine lights that might pop up. A gallon of antifreeze as well.

    That's about as far as it goes for the 4th gens unfortunately. Because if anything electronic were to pop up it's not a simple road side repair and pretty much requires a hook at that point.

    The classic cars are much easier for road trips. I keep a set of points along with a dwell meter, a spare coil, fuel pump, antifreeze. That's about it, and it pretty much covers anything that might stop the engine from running Spark and fuel is about it for those cars. I can do any of it on the road side in short order without being towed. Simplicity sure is nice, I digress.

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    ^^ Essentially the same, plus tire plugs and a roadside air compressor.

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    Quote Originally Posted by Firebirdjones View Post
    You sound like me. On long vacation trips I'll pack the belts too, as well as a tool kit for small things. I also keep a couple of spare relays in the car, as well as the laptop to diagnose any check engine lights that might pop up. A gallon of antifreeze as well.

    That's about as far as it goes for the 4th gens unfortunately. Because if anything electronic were to pop up it's not a simple road side repair and pretty much requires a hook at that point.

    The classic cars are much easier for road trips. I keep a set of points along with a dwell meter, a spare coil, fuel pump, antifreeze. That's about it, and it pretty much covers anything that might stop the engine from running Spark and fuel is about it for those cars. I can do any of it on the road side in short order without being towed. Simplicity sure is nice, I digress.
    Quote Originally Posted by pajeff02 View Post
    ^^ Essentially the same, plus tire plugs and a roadside air compressor.
    I used to carry a spare ECM in my 1st gen z34..

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    Quote Originally Posted by pajeff02 View Post
    ^^ Essentially the same, plus tire plugs and a roadside air compressor.
    Ah yes, I forgot to mention I carry a small air compressor and a tire plug kit, along with a small scissor style jack. (I hate bumper jacks) Sure beats changing the tire.

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