PAGE 9
IMPORTANT: When passing wire through sheet metal, always go through an existing
grommet, add a grommet or use silicone sealer to protect the wire from sharp edges.
Feed two 10 gauge, or larger, wires, one white and one black, from the mounted brake
control to the battery area. Using a ring terminal, connect the black wire to the 'aux' side
of the 30 amp circuit breaker. Leave the white wire for connection later.
Using a 10/12 gauge butt connector, attach the black wire from the 'aux' side of the
30 amp circuit breaker to the brake control's black wire. Using a 10/12 gauge butt
connector, attach the white wire from the battery area to the brake control's white wire.
Run a 10 gauge blue wire from the tow vehicle's trailer plug 'brake' terminal to the brake
control. Using a 10/12 butt connector, connect this wire to the brake control's blue wire.
Connect the brake control's red wire to the cold side
of the tow vehicle's stoplight switch using a wire tap.
NOTE: When making the stoplight switch connection on Ford / Mercury vehicles, do not
connect to the red wire with green stripe. Connect to the light green wire only.
For 1989 - 1991 Ford E and F series vans and trucks with anti-lock brakes, nd the
crescent shaped connector located on the steering column. The connector has two
rows of wires, the wire needed is the light green wire, second from the end in the
outside row. See the view shown in the wiring diagram on page 8.
For all other vehicles, use a test probe to nd the cold side of the stoplight switch. Probe
the switch wires until a wire is found that is only on when the brake pedal is pressed.
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