Subaru 2004 Baja Owner's Manual page 294

ground.
Do not connect safety chains to part of the ve-
hicle other than the safety chain hooks.
Hitch harness connector
9. Connect the hitch wire harness's black four-pin
wire connector to the towing trailer's wire harness.
10.Confirm proper function of the hitch wire harness
by individually activating the brake, right turn signal,
left turn signal, stop, and parking lights on the trailer.
NOTE
Always disconnect the trailer wire harness before
launching or retrieving a watercraft.
Driving tips
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