Question about 2004 Chevrolet Express

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Fan runs when engine is not

Intake fan (below windshield) turned on by itself, key not in ignition, had to disconnect battery to stop it.

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  • Chevrolet Master
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The first thing to test is the [bitron] sensor its on the side of the radiator this sensor overides the ign system.a simple test can soon establish if this the fault.to test ;1 disconnect the wiring plug from bitron switch ,bridge the two contacts in the wiring plug useing a lenth of spare wire and switch the ign on if the fan now operates the switch is faulty [replace]hope this helps you.adrain

Posted on Feb 18, 2009

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2000 Hyundai Excel ignition lock problem


What most people refer to as the "Ignition switch" is really the "cylinder lock", that when turned with the key, operates the actual "ignition switch".
The switch causing your problem is inside the steering column, and the column needs to be at least partly disassembled to access it.

Jan 25, 2014 | 1994 Hyundai Excel

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Ignition switch unable to turn car on key is hard to mget into switch nassemblyn I tried a new key that came with the vehicle


  • Disconnect the negative battery cable from the terminal on the battery. Remove the upper and lower steering column covers by unscrewing or unclipping them.
  • 2 Remove the steering wheel by lifting off the center cover, disconnecting the horn wire and removing the retaining nut and washer. Make a mark on the steering wheel spline and the wheel itself so you can line it back up precisely. Pull the steering wheel straight back to remove from the shaft.
  • 3 Take off windshield wiper and turn signal switches by pulling them off as you did the steering wheel and disconnect the wiring. Slide the spacer sleeve off of the steering column.
  • 4 Unscrew the ignition switch mounting screws. Pull out the ignition switch. Disconnect the wiring connector from back of the ignition switch. Simply loosen the tabs and pull it out.
  • 5 Insert your key into the ignition. Turn the ignition switch to the locked position. Depress the retaining pin with a small screwdriver and turn the key to the Off position to free the cylinder. Once it is free, turn the key to lock position and remove the key and key cylinder.
  • 6 Install your old key cylinder into the new ignition switch assembly. Make sure the contacts in the cylinder and assembly line up. Reattach wiring to ignition switch, slide it into place, screw in mounting screws and reassemble steering wheel and switches.
  • Dec 04, 2010 | 2007 Honda Ridgeline

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    The ignition will not turn off. My car has been


    Close off the air intake and it will stop. Disconnect the battery and replace the switch. I think you only need the tumbler and not the entire switch unit since it is the key that won't operate properly.

    Dec 31, 2009 | 2001 Chevrolet Cobalt

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    When I turn off my ignition, my heater fan will keep running


    I just started experiencing the same problem. Yes, typically after rainy days, I can never get the interior lights to go out after the ignition key has been removed. The car acts as if there is a door open. Now, my latest problem is with the heater fan. Of course, putting the control in the "off" position will turn it off but you can turn it on and off with no ignition key installed. I'm also having problems with my heater core too so it's been a pain in the but!!

    I believe this problem has also caused my battery to die which is why I'm on this site in the first place!! I can't get into the car with the keys and the dead battery won't allow me to unlock the car!! When it rains it pours!!!

    Sep 15, 2009 | 1998 Ford Expedition

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    The toyota Cmry engine won't stop unless battery is disconnected.


    i have the same problem with my corolla 2002 I turn off the keys and put it out and the engine still running, I uplug the EFI fuse and the engine stop, I guess I need to replace the ignition.. or i'm wrong???

    Jul 18, 2009 | 2003 Toyota Corolla

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    How do i remove ignition switch on a 1991 f150 ?


    HI, follow the steps below to help with this issue.



    Step 1

    Disconnect the negative battery cable from the terminal on the battery. Remove the upper and lower steering column covers by unscrewing or unclipping them.

    Step 2

    Remove the steering wheel by lifting off the center cover, disconnecting the horn wire and removing the retaining nut and washer. Make a mark on the steering wheel spline and the wheel itself so you can line it back up precisely. Pull the steering wheel straight back to remove from the shaft.

    Step 3

    Take off windshield wiper and turn signal switches by pulling them off as you did the steering wheel and disconnect the wiring. Slide the spacer sleeve off of the steering column.

    Step 4

    Unscrew the ignition switch mounting screws. Pull out the ignition switch. Disconnect the wiring connector from back of the ignition switch. Simply loosen the tabs and pull it out.

    Step 5

    Insert your key into the ignition. Turn the ignition switch to the locked position. Depress the retaining pin with a small screwdriver and turn the key to the Off position to free the cylinder. Once it is free, turn the key to lock position and remove the key and key cylinder.

    Step 6

    Install your old key cylinder into the new ignition switch assembly. Make sure the contacts in the cylinder and assembly line up. Reattach wiring to ignition switch, slide it into place, screw in mounting screws and reassemble steering wheel and switches.



    Jul 11, 2009 | 1991 Ford F150

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