Subaru 2004 Impreza - Manual (Page 339)

8-28
Driving tips
Hitch harness connector – Wagon
8. Connect the hitch wire harness’s black four-pin
wire connector to the towing trailer’s wire harness
9. 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.
! When you do not tow a trailer
" Remove the ball mount from the hitch receiver tube
and insert the receiver cover onto the hitch receiver
tube.
"
Place the dust cap over the four-pin connector of the
hitch wire harness to protect against possible damage.
"
Occasionally lubricate terminals of the four-pin con-
nector using terminal grease.
HS8015BA