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and locked to help prevent insects, rodents or
other pests from entering.
To
use
the
trailer
compartment door and extend the wire
harness, move the hinged slider tab over and
insert the wire harness into the empty
channel, then close and lock the trailer plug
compartment door.
Fig.7.3 Trailer plug compartment door slider tab
Trailer end of the 7-way plug
The trailer plug supplies power to the RV
brakes, tail lights, clearance lights, turn
signals, brake lights, etc. Wiring to operate
your brakes must be the same size in both
the tow vehicle and RV (the RV brake wiring
is 12-gauge wire).
Fig. 7.4 Trailer end (7-way plug) connector interior
7-way plug wiring code (trailer end)
White
1
Common ground
Blue
2
Electric brake
Green
3
Running/tail lights
Black
4
Auxiliary battery charge (+)
Red
5
Stop/left turn
Brown
6
Stop/right turn
Yellow
7
Auxiliary/back up light
plug,
unlock
the
TOWING & HANDLING
It should be noted that the center terminal is
labeled as an auxiliary circuit, most commonly
used for backup lights (not a ground terminal
as many try to make it).
Tow vehicle end of the 7-way plug
When attaching wires to your tow vehicle,
carefully and tightly tape all the connections
for moisture protection. On the tow vehicle
side, wire color alone should not be relied on,
always test and match the function to the
appropriate terminal.
Fig. 7.5 Tow vehicle end (7-way plug) connector
7-way plug wiring code (tow vehicle end)
White
1
Common ground
Blue
2
Electric brake
Green
3
Running/tail lights
Black
4
Auxiliary battery charge (+)
Red
5
Stop/left turn
Brown
6
Stop/right turn
Yellow
7
Auxiliary/back up lights
Maintenance
The connector plug may build up corrosion
with extended use and should be cleaned
periodically to insure good electrical contact.
Make sure the connector plug is kept clean
and protected from road elements as you
travel. When not in use, store the trailer plug
and cable, and lock the compartment door.
Generally speaking, RV's are wired to match
the connector colors. Any plug that has been
changed should be tested when replacing for
any reason to be sure the function matches
the terminal.
SECTION 7
59
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