1.
Attach the four-wire harness (Figure 15) to the cor-
responding connector on the InvisiBrake controller.
Route the other end through the hole in the firewall.
Use the same route as the 1/4" vacuum line, if that is
convenient.
2.
Using the 1" bolt and lock nut (Figure 15), mount the
break away switch (Figure 15) at the front of the vehicle.
Choose an area you can easily reach, near the center
of the vehicle, with a surface of sufficient strength to
hold the switch firmly in place, so that the break away
pin (Figure 15) will pull freely from the switch.
Mount the switch in a horizontal position, with the
break away pin facing the motorhome.
Make certain that the break away pin can be pulled
freely away from the towed vehicle, without any ob-
structions.
Do not attach the break away switch to the tow
bar. If the tow bar fails, the break away switch will
separate with it, preventing the break away system
from activating. If the towed vehicle separates, the
brakes will not be applied, which may cause prop-
erty damage, personal injury or even death.
Figure 15
Install the break away system; attach the power and ground wires
3.
Route the bundled pair of black wires to the front of
the vehicle and plug them into the break away switch.
4.
Route the bonded pair of black and red wires to
the towed vehicle’s battery (or if the battery is inac-
cessible, to an appropriate power source which will
be energized when towing). Using the two 3/8" ring
terminals, connect the black wire to negative and the
red wire to positive.
Make certain to install the 20-amp fuse on the red
wire as close as possible to the connection point.
Note: before attaching the wires, check the owner's
manual to make certain that aftermarket accessories
can be grounded to the negative battery terminal. If
they cannot, attach the black wire to any good chassis
ground, preferably directly to the chassis.
Note: if the vehicle owner’s manual indicates that
the battery must be disconnected for towing, the wires
must be routed directly to the battery or InvisiBrake will
not work.
Note: an Automatic Battery Disconnect (part number
766) and stop light switch kits for most popular towed
vehicles are available through ROADMASTER.
In order for InvisiBrake to function properly, the light-
ing systems on both vehicles must also function prop-
erly.
Before proceeding with the installation…
1.
Check the proper function of the brake, turn signal
and running lights on the towed vehicle.
2.
Independently check the proper function of the
brake, turn signal and running lights on the motor-
home.
3.
Position the vehicle behind the motorhome and con-
nect the tow lighting electrical cord between the two
Check the existing lighting
vehicles.
Do not connect the tow bar or the safety cables
— they may act as a false ground.
4.
Use the motorhome to activate the towed vehicle's
brake lights, turn signals and running lights.
5.
If any lighting system does not operate properly,
identify the source of the problem and correct it before
proceeding. Otherwise, InvisiBrake will not work.
Note: if the towed vehicle’s lights appear dim the
most likely cause is a poor ground in the motorhome
and/or towed vehicle.
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