Troubleshooting — BrakeMaster 9060
11
(The installation instructions contain illustrations and
instructions to accompany this section. To download or
print a copy of the most recent version of the instructions,
visit www.roadmasterinc.com. The instructions are under
the ‘Support’ tab.
Symptom
The motorhome monitor LED does not illuminate, even
though the brakes in the towed vehicle are being ap-
plied.
Solution
1.
The LED will not illuminate during very light braking.
2.
Make certain that the monitor patch cord is securely
connected between the two vehicles.
3.
The towed vehicle-to-motorhome electrical cord must
also be connected — the monitor system uses it for the
ground wire.
4.
The monitor LED is connected to the towed vehicle’s
brake light circuit. If the fuse in the circuit is blown, the
LED will not illuminate. Check the towed vehicle’s brake
lights — if they illuminate when the brake pedal is de-
pressed, the fuse is good.
5.
Did you install the optional Brake-Lite Relay? If so,
make certain that the monitor wire is connected to the
towed vehicle’s brake light wire
after
the brake light
switch, but
before
the Brake-Lite Relay — connecting the
wire anywhere else will prevent the monitor LED from
functioning.
Symptom
Nothing happens after proper installation.
Solution
1.
The motorhome engine must be running — if the en-
gine is off, there may be insufficient hydraulic pressure
to activate BrakeMaster.
2.
Check the air line connections. Remove the weather
covers from the quick couplers at both vehicles and gently
tug on the air line to verify that the quick couplers are
connected.
Check to make certain that the air cylinder quick cou-
pler is connected to the air line in the passenger compart-
ment.
3.
Check the wiring at the solenoid valve (on the propor-
tioning valve). One of the black wires must be connected
to a good chassis ground. The other black wire must be
connected to the motorhome brake wire downstream from
the brake light switch. Use a test light to confirm that the
solenoid valve is receiving power when the motorhome
brake pedal is depressed.
If the connections are good, test for proper function
— with the motorhome engine running, have an assistant
depress the motorhome brake pedal while you listen for
a “click” at the solenoid valve. The solenoid valve should
“click” every time the brake pedal is depressed.
4.
Disconnect the air line from the “out” compression fit-
ting on the solenoid valve. Have an assistant depress
the motorhome brake pedal — the proportioning valve
should
release air each time the pedal is depressed.
A.
If there is air at the proportioning valve — follow the air
line back to the air cylinder in the towed vehicle. Inspect
the entire line for deformities caused by excessive heat
and/or kinks in the line, which would restrict the air flow
— replace the entire section of air line if any are found.
Disconnect the quick couplers to confirm that they are
allowing air to flow through them.
B.
If there is no air at the proportioning valve — check to
confirm that the air line between the air compressor and
the proportioning valve is connected to the correct fitting.
It should run from the “in” fitting on the air compressor to
the “in” fitting on the proportioning valve.
If the air line is connected to the “out” fitting on the
proportioning valve, no air can pass through the valve,
and the BrakeMaster system will not function.
If this is the case, reconnect the line from the air com-
pressor to the “in” fitting on the proportioning valve.
Symptom
The compressor runs constantly, or runs much more
frequently than I think it should.
Solution
1.
Check for leaks in the air system.
2.
Make certain that the drain valve on the air compressor
air tank is closed.
3.
Make certain that the drain valve on the BreakAway
™
air reservoir is closed.
4.
Make certain that a female quick coupler has been
installed at the rear of the motorhome — a male quick
coupler does not have a check valve to prevent air from
escaping.
Symptom
It seems to require a significant amount of brake pres-
sure in the motorhome before the BrakeMaster air cylinder
activates in the towed vehicle.
Solution
1.
The motorhome engine must be running — if the en-
gine is off, there may be insufficient hydraulic pressure
to activate BrakeMaster.
2.
Inspect the air lines for deformities caused by exces-
sive heat and/or kinks in the line, which would restrict the
air flow — replace the entire section of air line if any are
found.
3.
Check for leaks in the air system: after starting the
motorhome, allow the air system to fully charge. Depress
and hold the motorhome brake pedal down.
Cover each joint, fitting and connection in the air sys-
tem with a leak check solution.
Tighten any fittings, if necessary, and repeat until all
connections are airtight.
4.
If the towing vehicle is a Ford Class C motorhome, the
proportioning valve must be teed into the front hydraulic
brake line — the rear brake line does not supply sufficient
hydraulic pressure.
5.
Not all of the air was bled from the brakes after in-
continued on next page
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