1967-1972 Chevy Truck, Blazer and Suburban
Intermittent Wiper Switch Installation Instructions 

*** Please read all instructions carefully before beginning installation***

Seller is not responsible for damage to switch or vehicle if not installed properly.

 

Removal of existing switch

 

Installing new switch

**Note: If using a bezel thicker than stock type, minor trimming of the dash metal may be required to allow additional threaded control shaft to be exposed for attachment of washer and retaining nut.

 

  •         Secure switch to dash using washer and nut that were included with new switch.

  •         Choose a mounting location for the three relays in a location under the dash that will be away from direct heat, but close to the wiper motor.

  •         Secure the relays using self-tapping screws or zip-ties (both included).

     

    Connecting the Wires

  • Near the relays, you will find a black wire for the ground connection and a yellow wire for power.
  • Connect the black wire to a known good ground using a self-tapping screw or an existing bolt/screw.

  • Connect the yellow wire from the new switch to the existing yellow wire that can be found leaving the wiper motor (see picture) using a blue Scotch-lok wire tap connector.

     
     

  • Connect three wires found near the switch’s main body to the existing three-wire harness connector by inserting the flat terminals firmly.

  •  If terminals do not stay inserted in the connector, bend them slightly to create a tighter fit.

    ***WIRES WILL BE LIGHT-BLUE, DARK-BLUE, AND BLACK***

  •  Be sure to connect these wires ‘color-for-color’ to the existing harness (see below)

     

    Putting It Back Together

  •         If you removed your gauge cluster for this installation, you may now reinstall it in your dash.

  •         Your factory wiper knob can be used on the new wiper delay switch.

  •         Remove the set-screw completely and set it aside (it will be reused)

  •         Using a ¼” drill bit, enlarge the existing hole in your wiper knob, being careful to drill straight.  Also, don’t go too deep or you will risk punching  thru the front of your knob.  We recommend using a drill press, but a hand-held drill will work also.

  •         Once you are finished drilling, re-install the set-screw.

  •         Place the wiper knob on the control shaft and tighten the screw to secure it.

     

    Testing your new switch

  •         You may now reconnect your battery.

  •         Turn on your ignition switch.

  •         Turn your wiper knob clockwise one click to operate the delay mode.  Settings can be changed from about 13 seconds down to about 2 seconds between wipes by adjusting the knob clockwise and counter-clockwise.

  •         The next click to the right will be low speed operation.

  •         The final click to the right is high speed.

  •         To operate the wash feature, push in on the button.  Spray will be delivered as long as you hold in on the button.

  •         If you operate the wash feature while your wiper switch is off, spray will be delivered as long as you hold in on the button.  Once you release the button, the wipers will deliver roughly three more wipes before stopping.

    ****NOTE****

    If you are not able to operate the wash feature, you may need to loosen the set-screw on the wiper knob and move the knob out slightly.  Tighten the set-screw and try again.

     

    *****NOTE****

    If you wash feature did not work BEFORE you installed the new switch, it most likely will not work now.   

    Thank you for purchasing the

    1967-1972 Intermittent Wiper Switch

     

     

    Contact Us: 

    Business Hours: Monday – Friday 9:00am-5:00pm (EST) 

    Sales: 1.866.489.1530

    Tech Support / Local: 1.336.510.9299