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A downpour of rain will no longer hinder your ability to clearly see the road. The Detroit Speed
Selecta-Speed Wiper Kit provides you with the performance and convenience of a late model
wiper system in a package that easily and cleanly mounts in your 1973-83 C10 GM Truck.
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DSE F501-300 (Rev 06/28/19)
Detroit Speed, Inc.
Selecta-Speed Wiper Kit
1973-83 C10 GM Truck
P/N: 121633 & 121634
Figure 1 – PN 121634 Shown
Description
Wiper Motor Assembly
Wiper Control Module w/Mounting Plate
Wiper Harness
Wiper Switch Assembly
Hardware Kit
Instructions
Page 1 of 15
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Summary of Contents for Detroit Speed Selecta-Speed 121633
- Page 1 1973-83 C10 GM Truck P/N: 121633 & 121634 A downpour of rain will no longer hinder your ability to clearly see the road. The Detroit Speed Selecta-Speed Wiper Kit provides you with the performance and convenience of a late model wiper system in a package that easily and cleanly mounts in your 1973-83 C10 GM Truck.
- Page 2 This kit does feature a washer pump option as the wiper switch does have a push button function. The wiring harness/control module is equipped with a power and ground wire to install an inline electric washer pump. Detroit Speed does offer a washer pump kit available as part number 121102.
- Page 3 Figure 2 – Parked Location 3. Remove the 3 bolts holding the stock wiper motor to the firewall. 4. Disconnect the wiper linkage from the wiper motor pitman arm and remove the stock wiper motor from the firewall (Figure 3). Figure 3 –...
- Page 4 “parked” postion. Do not move the pitman arm by hand to attach the wiper linkage. If the pitman arm is moved from the original “parked” position from Detroit Speed, it may result in the wiper blades stopping in the wrong spot on the windshield.
- Page 5 Figure 6 – Remove Factory Wiper Switch (1973-74 shown) 10. Once the switch is removed from the dash, remove the light bulb housing by turning it counter clock-wise in the switch housing. In order to use the LED light for the new wiper switch, you will need to cut the wires from the original light bulb housing.
- Page 6 Figure 8 – Strip Wires for Connector 13. Remove the nut on the provided LED and insert the LED through the square hole on the front of the wiper switch LED light box assembly. Install the nut back onto the LED and tighten with a 8mm wrench (Figure 9).
- Page 7 (Figure 11). NOTE: Detroit Speed recommends using a zip tie to hold the LED wire and the wiper switch together. This will help protect the small LED wires from getting crushed, twisted, or bound up. Figure 11 – Tighten Wiper Switch Assembly 16.
- Page 8 Figure 13 – Install Connectors to LED Dimmer 18. Ensure that you are connecting the “LED” side of the dimmer to the original wires. This is indicated on the label of the dimmer. Insert the LED wires to the LED dimmer connectors paying close attention to the wire colors.
- Page 9 19. Before the gauge panel is re-installed, you will need to set your LED brightness on your dimmer. Make sure all electical connections are completed and re-connect the negative battery lead to your battery. To set the dimmer, be sure that the dimmer is wired to the original light circuit (red to gray, black to black).
- Page 10 Figure 16 – Set LED Brightness 23. Next, install the wiper switch adapter plate onto the Selecta-Speed wiper switch. Remove the switch hex nut and star washer from the switch. Position the switch anti-rotation tab into the anti-rotation hole located in the adapter plate (Figure 17). Hold the adapter plate to the wiper switch by threading on the switch hex nut and provided 3/8”...
- Page 11 Figure 18 – Install Wiper Switch (1973-74) Figure 19 – Install Wiper Switch (1978- 25. Re-install the gauge panel to the dash using the original fasteners. Slide the wiper knob onto the shaft of the wiper switch. Align the set screw with the flat on the switch shaft and tighten (Figure 20 &...
- Page 12 (Figure 23 on the next page). Figure 23 – Install Wiper Motor Harness 28. The Detroit Speed Selecta-Speed harness does include a weather pack connector to install an optional electric inline washer pump into your vehicle (Figure 24). Detroit Speed does offer a washer pump kit you can purchase separately as part number 121102.
- Page 13 Figure 24 – Washer Pump Connection 29. If you do not want to use the washer pump feature, you can tie wrap this connector/loom up under the dash. If you would like to use this option, use an existing hole or drill a new hole in your firewall to pass the connector through the firewall.
- Page 14 Remove Bolt Figure 25 – Mount Control Module 32. With the wiper control module in place, plug in the wiper switch and wiring harness connectors into the control module (Figure 26). Wire Harness Wiper Switch Figure 26– Connect Wiper Switch & Harness to Module 33.
- Page 15 704.662.3272 Detroit Speed, Inc. is not liable for personal, property, legal, or financial damages from the use or misuse of Legal Disclaimer: any product we sell. The purchaser is solely responsible for the safety and performance of these products. No warranty is expressed or implied.
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