SnowEx SP-7550 - Manual (Page 12)

© Trynex International 2011 (REV 001) 12
General Wiring Instructions
Model # SP-7550
Step 1: Take harness assembly and route from the rear of the vehicle to the front. Route harness along frame and attach to frame hole and
frame supports. It is not recommended to attach to fuel or brake lines for obvious reasons. Do not route close to exhaust system or
engine, even though Snowex uses high temperature wiring. It still could melt under extreme heat and short the spreader electrical
system, as well as the vehicle electrical system.
Step 2: Mount rear plug on bumper using supplied bolts, locate towards the center of the bumper to reduce the amount of debris the tires
will throw to the rear. Important: Apply a small amount of dielectric grease to the plug. Also try to mount so plug faces upward to
help keep plugs tightly sealed.
Step 3: Secure harness from the rear to the front using heavy duty ty-wraps or frame clips along the frame and lighter duty ty-wraps
everywhere else.
Step 4: Layout harness portion that connects to the battery along the fire wall and fender well. Do not connect power leads to battery yet.
Drill a 3/4” hole in the fire wall, or use existing access hole, for the control portion of the harness and route connector and harness
through hole. Be sure to check the area on the other side of the fire wall to make sure you are not drilling into the vehicle harness
or a control module. Generally you can drill on either side of the steering wheel for a good location.
Step 4A: The power harness from control box to battery will need to be routed from the inside of the cab to the battery – this results from
the large high amperage connector. Route leads with lugs to battery — do not connect power at this time.
Step 5: Connect harness to the back of the controller and mount to a suitable location. NOTE: You may want to contact customer before
mounting controller as some prefer not to have holes drilled into the dashboard. Ty-wrap loose controller harness and move to the
engine compartment. Do not mount close to any heater vents.
Step 6: Connect power leads to the battery: Red + Positive, Black – Negative, always connect to the primary battery if using a dual battery
system. Secure loose loom to any other large or medium vehicle harness with medium duty ty-wraps, this will secure wiring
harness.
Step 7: Push the ON/OFF button on the controller to check for power ; when that has been conrmed turn power OFF. The electrical portion
of the installation is complete.