Lit. No. 74226, Rev. 00
13
September 15, 2020
WIRING & HARNESS INSTALLATION
INSTALLING THE PUMP KIT
NOTE: The liquid accessory harness kit provides
an ON/OFF switch to activate the
liquid system from inside the vehicle.
To properly wire the ON/OFF pump kit, follow these
instructions and refer to the Liquid Kit Harness Wiring
Diagram on page 14.
1. Install the ON/OFF pump kit.
2. Remove the chute from the spreader.
3. Remove the cover from the hopper electrical
enclosure located on the top of the sill extension
cover.
4. Find the break-thru plug on the passenger's side
of the electrical enclosure and use a tool to cut an
"X" in the center of the plug. Route the liquid kit
relay assembly harness through the cut break-thru
plug.
CAUTION
Before drilling any holes, check both sides
of the material for any wires, fuel lines, fuel
tanks, etc., that may be damaged by drilling.
5. Find the break-thru plug on the inside face of
the pump box and use a tool to cut an "X" in the
center of the plug. Route the harness from the
passenger's side of the electrical box into the
break-thru plug on the inside face of the pump
box.
6. Remove the cover from the isolated stud block.
7. Attach the ring terminal connected to the red
wire of the liquid kit harness to the POSITIVE (+)
terminal of the isolated stud block.
8. Attach the ring terminal connected to the black
wire of the liquid kit harness to the NEGATIVE (–)
terminal of the isolated stud block.
9. Connect the male bullet terminal of the liquid kit
wire assembly harness to the orange wire coming
from the spreader module.
10. Reinstall the covers onto the isolated stud block
and electrical enclosure.
11. Secure all harnessing to prevent damage to the
wires and mount relay to mounting bar.
Isolated Stud Block
Spreader
Module
Break-Thru Plugs
Relay
Mounting
Bar
