1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Wiring for blower motor

Discussion in 'Electrical & Audio' started by crusin242000, Aug 13, 2019.

  1. crusin242000

    crusin242000 Junior Member

    Age:
    39
    Posts:
    13
    Likes Received:
    3
    Joined:
    Feb 19, 2018
    Location:
    Vivian
    First Name:
    Eric
    Truck Year:
    1982
    Truck Model:
    C-10
    Engine Size:
    350
    Hello , I have finally put all of my heater core and hvac parts in that were taken out by a shop. Now to connect all the wires. I don’t know where to hook up what as I didn’t wake it apart. Any diagrams or input will be much appreciated! Thanks , Eric


    Sent from my iPhone using Tapatalk
     
  2. Big Chip

    Big Chip Full Access Member

    Age:
    51
    Posts:
    2,639
    Likes Received:
    2,999
    Joined:
    Oct 19, 2017
    Location:
    Michigan
    First Name:
    Kevin
    Truck Year:
    1979
    Truck Model:
    C35
    Engine Size:
    454
  3. Dmack

    Dmack Full Access Member

    Posts:
    111
    Likes Received:
    111
    Joined:
    Mar 13, 2019
    Location:
    Central OR
    First Name:
    Dave
    Truck Year:
    1983
    Truck Model:
    K20
    Engine Size:
    350
    AC or just heater?
     
  4. crusin242000

    crusin242000 Junior Member

    Age:
    39
    Posts:
    13
    Likes Received:
    3
    Joined:
    Feb 19, 2018
    Location:
    Vivian
    First Name:
    Eric
    Truck Year:
    1982
    Truck Model:
    C-10
    Engine Size:
    350
    It has ac and heat , sorry for the delay in response .


    Sent from my iPhone using Tapatalk
     
  5. 75gmck25

    75gmck25 Full Access Member

    Posts:
    706
    Likes Received:
    354
    Joined:
    Oct 13, 2016
    Location:
    VA
    First Name:
    Bruce
    Truck Year:
    1975
    Truck Model:
    K25
    Engine Size:
    5.7
    Did they leave the wiring in place and just unplug it, or did they remove the wiring? Did they remove only the plenum under the dash, or take out the entire assembly?

    If its all there with the stock plugs, its relatively easy to figure out what plugs in to each component. However, if they pulled out all the wiring you have a much bigger job ahead of you.

    The electrical components on the plenum are under the hood.
    - Blower relay (very obvious silver relay box)
    - Resistor pack (mounts flush into the plenum, with electrical terminals sticking out.

    There is also a 10 gauge power wire for the blower motor, which runs from the blower motor across the firewall through an inline fuse, connecting to the power junction near the brake booster.

    Under the dash all wiring plugs into the dash controls.

    You also have to figure out all the vacuum lines, which I hope are still there. There are four vacuum motors that need to be plugged into the dash controls.


    Bruce
     
  6. crusin242000

    crusin242000 Junior Member

    Age:
    39
    Posts:
    13
    Likes Received:
    3
    Joined:
    Feb 19, 2018
    Location:
    Vivian
    First Name:
    Eric
    Truck Year:
    1982
    Truck Model:
    C-10
    Engine Size:
    350
    They took the whole assembly out under the dash. Most of those wires and vac lines were still attached. What wasn’t was cut and I was able to figure that out. The firewall side of the equation is what is slowing me down. Your explanation made it easier to picture . I’ll respond when I have an update. Thanks for the input !!


    Sent from my iPhone using Tapatalk
     
  7. 75gmck25

    75gmck25 Full Access Member

    Posts:
    706
    Likes Received:
    354
    Joined:
    Oct 13, 2016
    Location:
    VA
    First Name:
    Bruce
    Truck Year:
    1975
    Truck Model:
    K25
    Engine Size:
    5.7
    I can take a couple of pictures, if it would help. I have a different accumulator than stock, but otherwise its still the original setup for the plenum under the hood.
     
  8. chengny

    chengny Full Access Member

    Posts:
    4,005
    Likes Received:
    758
    Joined:
    Feb 22, 2012
    Location:
    NH
    First Name:
    Jerry
    Truck Year:
    1986
    Truck Model:
    K3500
    Engine Size:
    350/5.7
    Some of this might help:

    Pages from 1982_GM_CK_LIGHT_TRUCK_Wiring_Manual_1B-1G.JPG

    Pages from X8232_1982_GMC_CKGP_Light_Duty_Truck_Service_Manual.JPG

    Pages from Group 9 - Body Mounting - AC Engine Side & Control.JPG
     

Share This Page