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The Sterling All Terrain tow bar comes equipped with a
fully-wired motorhome-to-towed vehicle electrical cord —
simply plug the cord into the sockets on the motorhome
and the towed vehicle.
If you should need to rewire the plugs and sockets,
follow the instructions below for a four-wire system, or the
instructions on pages 14 and 15 for a six-wire system.
Wiring the plug for a four-wire system
1. Insert the end of the electrical cord through one of the
cable guides.
2. Wire the plug to match your vehicle, or follow Figure
12. Apply a silicone sealant to the wires where they attach
to the plug — this will help prevent damage from moisture
and corrosion.
Wiring the sockets for a four-wire system
1. Find a suitable location to install one of the electrical
sockets on the front of the towed vehicle, in reach of the
existing four-wire harness.
2. Loosen the set screw at the back of the socket, and
push the inner connector out the front. Now, run the four-
wire electrical cord through the back of the housing.
3. Loosen all of the set screws on the side of the sock-
et, and connect the wires to the back of the socket, as
continued on next page
Wiring instructions
3
4
1
2
Socket Pin Wire
Number Color Motorhome Towed Vehicle
1 ...............Yellow.........Left turn / Stop........ Left turn / Stop
2 ...............White ..........Ground...................... Ground
3 ...............Red .............Right turn / Stop ..... Right turn / Stop
4 ...............Black...........Taillight..................... Taillight
front of
plug on
4-wire
cord
Figure 12
13
24
front of
4-wire
socket
on towed
vehicle and
motorhome
Socket Wire
Pin Number Color Motorhome Towed Vehicle
1 ...............Yellow.........Left turn / Stop........ Left turn / Stop
2 ...............White ..........Ground...................... Ground
3 ...............Green..........Right turn / Stop ..... Right turn / Stop
4 ...............Brown .........Taillight..................... Taillight
Figure 13