Boss Snowplow RT3 EXT Installation Instructions Manual page 15

1. Black power/ground cable
2. Brown wire
3. Red/white fused wire
24. Connect the brown wire to the negative (-)
battery terminal (Figure
25. Connect the free end of the battery cable to the
positive (+) battery terminal
26. Connect the red, fused wire and the red/white
fused wire to the positive (+) battery terminal
(Figure 21).
27. Mount the truck-side, wire harness plow
connector to the lower part of the bumper using
the control harness mounting bracket
22).
1. Control-harness mounting
bracket
2. Plow connector
28. Mount the black and red power/ground
connector to the control harness mounting
bracket (Figure 22).
Figure 21
4. Red fused wire
5. Red power/ground cable
21).
(Figure 21).
(Figure
Figure 22
3. Power/ground connector
29. Mount the relay pack to the inside of the engine
compartment using a sheet-metal screw
23).
Note:
Ensure that the relay pack is mounted
in the upright position.
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1. Relay pack
30. Locate the vehicle option connector and align it
according to the table below:
Note:
If your vehicle is not listed in the table,
use the standard orientation.
Note:
If the vehicle option connector is not
properly oriented, the lights on the plow do not
function correctly.
Models
1992 and newer
Ford models
1988 and newer
GM models
2003 and newer
Dodge models
Dodge models
with a 4-headlight
system
1987 and older
GM models with a
4-headlight system
1987 to 1991 Ford
models (9004 bulb)
1994 to 2002
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Dodge models
with a 2-headlight
system (9004 bulb)
31. Connect the red/white wire to the battery
according to the table below:
Note:
If the red/white wire is installed
incorrectly, the low beams do not illuminate
when the plow high-beams are on.
15
Figure 23
Orientation
Standard Orientation
1. Red/yellow wire 3. Red/yellow wire
2. White/yellow 4. White/yellow
wire wire
Reverse Orientation
1. White/yellow 3. Red/yellow wire
wire 4. White/yellow
2. Red/yellow wire wire
(Figure
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