Owner`s manual

22
TROUBLESHOOTING
Symptom
The fuse for the towed vehicle’s
12-volt outlet keeps blowing.
The compressor comes on
when the 9700 is plugged in, but
not actually being used for brak-
ing.
Nothing happens after proper
installation.
The motorhome monitor LED
does not illuminate, even though
the brakes in the towed vehicle
are being applied.
Solution
Electrical
Check the 12-volt outlet fuse size. It must be rated at 15 amps or
higher. If the towed vehicle's fuse is not sufficient, install the optional
12-volt outlet kit (part number 9332; refer to the “Optional Equipment”
section).
The 9700’s compressor may activate about every 10 minutes due to
normal air dissipation. If the compressor activates repeatedly within 10
minutes or less (when not braking), contact ROADMASTER — you may
have an air leak in the 9700.
• The 9700 will activate within two seconds after the motorhome brake
pedal has been depressed. Hold the motorhome brake pedal down for
at least two seconds; check to see if the 9700 activates.
• Verify that the 9700 is receiving a brake light signal from the motor-
home — with a test light, check for voltage at the female bullet connec-
tor (at the end of the green brake signal wire) which is plugged into the
9700 wiring harness. If there is no voltage, check the brake signal wire
connections at the towed vehicle's electrical harness (Refer to “Attach
the brake signal wire” under “Initial Installation.”).
• Check the towed vehicle’s battery voltage. If the battery doesn’t have
sufficient power, the 9700 will not operate.
• Check for a red light at the end of the 12-volt power cord. If there is
no light, there is no power.
• Check the fuse on the end of the 12-volt power cord. If the fuse is
blown, polarity at the 12-volt outlet may be crossed, with positive
connected to ground, and ground to positive. Correct the wiring, and
replace the fuse in the 12-volt power cord.
• An optional 12-volt outlet kit may be required. Refer to “Before you
begin the initial installation,” in this manual.
• The operating temperature range is between -2° and
+
150° F
(-19° to
+
66° C). The 9700 will not operate at temperatures above or
below this range.
• Hold the towed vehicle brake pedal down, for approximately 20 sec-
onds. If the audio alert activates, then one of the two connections to the
LED may have worked loose. Check both the power and the ground con-
nections.
• Make certain that the motorhome monitor patch cord between the two
vehicles is securely connected. (Or, if you have connected the monitor
wiring to the towed vehicle and motorhome electrical sockets, make cer-
tain that the towed vehicle-to-motorhome electrical cord is securely con-
nected.)
• The monitor LED is connected to the towed vehicle’s brake light cir-
cuit. If the fuse in the circuit is blown, the LED will not operate. Check
the towed vehicle’s brake lights — if they illuminate when the brake ped-
al is depressed, the fuse is good.
• Verify that there is an electrical ground between the motorhome and
the towed vehicle.
• 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.