inStAll the motoRhome monitoR SyStem
Step one
Wire the towed vehicle
Note: there are two lengths of black wire in this kit,
each with a female bullet connector at one end. Use
the short length of wire in this step.
1.
Choose a mounting point at the front of the vehicle,
near the male quick coupler you attached in step 2,
“Install air lines in the towed vehicle,” for the end of
the harness with the female bullet connector. Attach the
connector with one or more of the included wire ties.
Allow enough slack so that a male bullet connector can
be plugged into and out of it.
2
. Once the female bullet connector is attached, route
the monitor wiring harness through the engine compart-
ment, to the driver’s side of the firewall. Use the same
route as the air line, if that is convenient. As before,
avoid lines, hoses, moving parts or “hot” components
such as the engine or exhaust systems. Where ap-
propriate, use wire ties to secure the wiring harness
in place.
3.
Route the monitor wiring harness through the same
hole as the air line.
4.
Before connecting the monitor wiring harness to the
brake light wire, determine if the optional Brake-Lite
Relay must be installed — refer to “Brake light solutions,”
in these instructions, for information on how to identify
the type of brake and turn signals in the vehicle. Then,
test the towed vehicle’s brake lights, as described in
“Brake light solutions.”
Several wiring alternatives are available to you,
based on the type of brake and turn signals in the
vehicle, and the results of the test.
5.
Next, locate the towed vehicle’s brake light switch
and, with a test light, find the “cold” side of the brake
light switch. (The “cold” side of the switch does not
register voltage unless the brakes are applied.) With a
12-volt meter, verify that you have found 12 VDC
+.
Then, remove the vehicle’s brake light fuse, located in
the vehicle’s fuse panel.
failure to remove the brake light fuse from the
vehicle’s fuse panel may cause the vehicle’s theft
deterrent system, or other electrical system indica-
tors, to be activated if the brake pedal is depressed
during the installation. this may require non-war-
ranty repair to the vehicle.
6.
Cut the brake light wire, a few inches downstream
from the “cold” side of the brake light switch.
if the brake-lite Relay is required…
(see step 4, above)
Install the Brake-Lite Relay now. The instructions
are included with the kit. After the Brake-Lite Relay is
installed, proceed to Step Two, “Wire the motorhome”
(below).
if the brake-lite Relay is not required…
(see step 4, above)
7.
If necessary, trim the monitor wiring harness, then
attach the monitor wire to the brake light wire, using
the supplied yellow butt connector.
8.
Ensure that the monitor wiring harness will not pres-
ent an obstacle or hazard to the driver of the vehicle,
or interfere with the operation of the vehicle. Use one
or more wire ties, if necessary, to secure the wiring
harness out of the way.
9.
Reinstall the brake light fuse, which you removed
in step 5.
continued on next page
10
figure 14
Summary of Contents for BrakeMaster 9100
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