TOYOTA 2011 Tundra - Manual (Page 303)

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2-5. Driving information
2
Wh
en drivin
g
Positions for towing hitch receiver and hitch ball
Hitch receiver pin hole posi-
tion: 46.4 in. (1179 mm)
Connecting trailer lights
Use the wire harness stored in the rear end under the vehicle body.
4 pin connector
4 pin, 7 pin connectors (if equipped)