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  1. #1

    Default Colorado blower switch problem

    Hello,
    new member here....
    '05 Colorado 94k miles.
    The blower switch suddenly lost speeds 1 thru 3. Speed 4 seems normal and the A/C works like it's supposed to.
    Likely the switch itself or some type of resisters involved ?

    Thanks,
    Bill

  2. #2

    Default

    Quote Originally Posted by rider89 View Post
    Hello,
    new member here....
    '05 Colorado 94k miles.
    The blower switch suddenly lost speeds 1 thru 3. Speed 4 seems normal and the A/C works like it's supposed to.
    Likely the switch itself or some type of resisters involved ?

    Thanks,
    Bill
    The first thing to check is the resistor which is mounted on the HVAC case. When they go bad you usually will have the high speed only.
    Jim

    2004 SILVERADO 2500HD LS
    Pro Comp Leveling Kit
    285-75-16 Cooper ST All Terrains
    Pro Comp Programmer
    Bilstein Shocks
    Linux Bed Liner
    Tinted Windows



    Other rides:

    1967 Landcruiser <350 Chevy>
    1970 Camaro
    1990 Geo Metro Convertible
    2007 FJ Cruiser

  3. #3

    Default

    Does getting to it require taking the dashboard apart ?

    thanks,
    bill

  4. #4

    Default

    Quote Originally Posted by rider89 View Post
    Does getting to it require taking the dashboard apart ?

    thanks,
    bill
    No the resistor is located on the outside of the HVAC case. Have you tried looking for it yet?
    Jim

    2004 SILVERADO 2500HD LS
    Pro Comp Leveling Kit
    285-75-16 Cooper ST All Terrains
    Pro Comp Programmer
    Bilstein Shocks
    Linux Bed Liner
    Tinted Windows



    Other rides:

    1967 Landcruiser <350 Chevy>
    1970 Camaro
    1990 Geo Metro Convertible
    2007 FJ Cruiser

  5. #5

    Default

    I think I found it. The wiring harness has white, orange, blue, tan? into a straight black connector which plugs into a white nylon socket, near the blower motor. The white part is the resistor, I suppose ?
    Also, I noticed that the orange lead in the black connector looks like it has overheated. Is this typical of a resistor failure ?
    Thanks,
    Bill

  6. #6

    Default

    Yes it is. If you check it with your ohm meter you will probably find the circuit open.
    Jim

    2004 SILVERADO 2500HD LS
    Pro Comp Leveling Kit
    285-75-16 Cooper ST All Terrains
    Pro Comp Programmer
    Bilstein Shocks
    Linux Bed Liner
    Tinted Windows



    Other rides:

    1967 Landcruiser <350 Chevy>
    1970 Camaro
    1990 Geo Metro Convertible
    2007 FJ Cruiser

  7. #7

    Default

    I ordered a resistor and a couple other things yesterday.
    Funny thing is, yesterday I disconnected that wiring harness fitting from the resistor to look it over.
    This morning, I just fired up the truck and the silly blower works on all speeds!
    Almost like really low voltage computer devices, unplug replug and they magically start working again.
    I suppose I'll replace the resistor anyway when the part arrives.
    Thanks again for the help,
    Bill

  8. #8

    Default

    Glad you got it working.
    Jim

    2004 SILVERADO 2500HD LS
    Pro Comp Leveling Kit
    285-75-16 Cooper ST All Terrains
    Pro Comp Programmer
    Bilstein Shocks
    Linux Bed Liner
    Tinted Windows



    Other rides:

    1967 Landcruiser <350 Chevy>
    1970 Camaro
    1990 Geo Metro Convertible
    2007 FJ Cruiser

  9. #9

    Default

    be sure to check your plug for shorting thats what did my silverados resistors in.

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