Roadmaster Invisibrake 8700 Installation Instructions Manual
InvisiBrake specifications
Controller height ..........................................2¾ inches
Controller width ...........................................8¾ inches
Controller length ..........................................8¾ inches
Voltage .......................................................12 volts DC
Fuse size ......................................................... 20 amp
Operating temperature range
............................... -2° to +150° F (-19° to +66° C)
Maximum amperage draw ...........................10.8 amps
Idle amperage draw ............................................. 6 mA
Battery recharging rate ........................... up to 2 amps
Approximate maximum air pressure .................. 80 psi
Required tools
• drill with ½" and 5/16" bits (The ½" bit is only
necessary if there is no pre-existing hole through
the firewall; the 5/16" bit is necessary if you will
drill a hole through the motorhome dashboard for
the LED monitor light)
• test light
• multi-meter
• wire strippers or crimpers
• 7/16", 1/2" and 9/16" wrenches
• 5/32" Allen wrench
• adjustable wrench
• 5/16" and 3/8" drivers
Table of contents
Components .............................................................. 1
Towed vehicle wiring diagram ................................... 2
Verify the application ................................................. 3
General warnings and cautions ................................. 4
Installation instructions ......................................... 5-17
Plan the installation ............................................5-8
Begin the installation —
Attach the clamp, pulley and bracket ........... 9-10
Adjust the cable .................................................. 10
Route the cable housing
and attach the air line ..................................... 10
Attach the vacuum line ......................................... 11
Check the existing lighting .................................. 12
Install the break away system;
attach the power and ground wires ................ 12
Attach the four-wire flat harness;
attach the controller ....................................13 -14
Install the monitor system ...............................14-15
Test the system ...............................................16-17
If you are a professional installer…
…return these instructions to the owner, for the
owner's future reference.
Read all instructions before installing or operating InvisiBrake. Failure
All illustrations and specifications contained herein are based on
the latest information available at the time of publication. ROADMASTER, Inc. reserves the right to make changes, at any time, without
notice, in material, specifications and models, or to discontinue
models.
to understand how to install or operate InvisiBrake could result in property damage, personal injury or even
death.
IMPORTANT NOTICE!
Safety Definitions
These instructions contain information that is very important to know and understand. This information is provided for safety and to prevent equipment problems. To help recognize this information, observe the following
symbols:
CAUTION
WARNING indicates a potentially hazardous situ-
ation which, if not avoided, could result in property
damage, serious personal injury, or even death.
CAUTION used without the safety alert symbol
indicates a potentially hazardous situation which,
if not avoided, may result in property damage.
CAUTION indicates a potentially hazardous situation which, if not avoided, may result in property
damage, or minor or moderate personal injury.
NOTE
Refers to important information and is placed in italic
type. It is recommended that you take special notice
of these items.
Components
part number description
1 945201- 00 ........InvisiBrake controller, complete
2 452109 ..............cable only
3 452109 -10 .........air cylinder only
4 452104-10 .........pulley only
5 452140 ..............cable anchor bracket
6 945202-00 ........brake pedal clamp
(with mounting nuts and bolts)
7 450008 .............monitor wire patch cord
8 450008-15 ........car side monitor wire,
15 feet long (not shown)
9 450008-50 ........motorhome side monitor wire,
50 feet long (not shown)
10 945203-00 ........four-wire harness with 4-pin
connector:
break away, power and ground
11 8602 .................break away cable
12 650898 .............break away switch, pin and ring
200200-20 .......break away pin and ring only
13 300065-00 ........motorhome monitor LED
14 4 5135 0 ..............audio signal circuit board
15 Vacuum check valves
452141 ..............3/8" vacuum check valve
452142 ..............1/2" vacuum check valve
16 450701 ..............1/8" air line (not shown)
17 450700 .............1/4" nylon vacuum line (not shown)
18 4 52111 ..............1/4" rubber vacuum hose, one foot
(not shown)
19 452137 ..............3/8" rubber vacuum hose (not shown)
20 452136 ..............1/2" rubber vacuum hose (not shown)
21 452118 ..............3/8" vacuum line tee
22 45 2116 ..............1/2" vacuum line tee
23 945204-00 ........four-wire flat harness with six-pin
connector: towed lighting
(Components not shown to scale)
3
5
2
4
6
7
10
11
1
23
22
14
13
21
12
15
1
2
IMPORTANT!
Read this before you continue.
InvisiBrake will not work in all vehicles. Verify the
application before continuing.
1. Refer to the InvisiBrake application resource
guide under ‘Vehicle-Specific Information’. (If you
are
a professional installer, consult this list often — it is
updated constantly.)
2. Determine which type of braking system is in
the towed vehicle…
• If the vehicle has a power brake booster and vacuum
line similar to that shown in Figure 13, it has vacuumassisted power brakes. Proceed to step 3, “Check the
lighting system.”
• If the vehicle does not have vacuum-assisted power
brakes, it likely has hydroboost power brakes. If they
are electric hydroboost, InvisiBrake will work. If they
are standard hydroboost, it will not work.
To determine if hydroboost brakes are electric or
standard — make all adjustments necessary to prepare the vehicle for towing, as per the owner’s manual.
These adjustments may include disconnecting the battery or pulling fuses.
Make certain that the ignition is in the “tow” position.
Turn off the heater, radio and any other accessories
that could make noise. Have an assistant pump the
brakes several times while you listen carefully under
the hood. If you hear an electric pump running, the
vehicle has electric hydroboost.
Note: the electric pump motors are very quiet. Per-
form the test in an area without background noise.
If you don’t hear a pump running, either the vehicle
has standard hydroboost or the power brake pump is
not energized when the vehicle is in the “tow” mode.
In either case, InvisiBrake will not function.
ROADMASTER’s other braking systems, such as
Even Brake, BrakeMaster and the 9700 will work in
vehicles whose power brakes are not energized when
the vehicle is in the “tow” mode.
3. Check the lighting system…
• If the vehicle has a ‘bulb and socket’ lighting system, magnetic lights or a light bar, it must be grounded
directly to the chassis, or InvisiBrake will not function.
Note: usually, these devices are only grounded to
the RV chassis. They must be grounded to the towed
vehicle’s chassis in order for InvisiBrake to function.
cal system, as well as other consequential, nonwarranty damage will occur if the ground wire is
not attached at one of these points.
4. Verify proper use of diodes…
• If the vehicle has been ‘hard-wired’ for towing,
make certain that diodes are installed to protect both
the towed lighting harness and the vehicle's electrical circuits, as shown on page two. Diodes must be
installed to prevent backfeed to the towed lighting
harness or InvisiBrake will not function properly.
• Likewise, if a ‘plug and play' electrical harness
has been used, diodes must be installed to protect
the towed lighting harness. (Most harnesses of this
type only have diodes to protect the towed vehicle's
electrical circuits.)
CAUTION
InvisiBrake uses the towed lighting harness as a
power source. If diodes are not installed to protect
this circuit InvisiBrake will not function properly.
• If the diodes are single terminal (as shown below),
ROADMASTER recommends replacing them with ‘two
terminal in, one terminal out' diodes (as shown below).
CAUTION
Although not recommended, if single terminal
diodes are used they must be installed in each of
the wiring circuits. Otherwise, InvisiBrake may not
function properly. Non-warranty electrical damage
may also occur to a vehicle with an unprotected
circuit.
CAUTION
Refer to the owner’s manual before attaching a
ground wire. Some manufacturers stipulate that
ground wires must be attached at specific locations. Significant damage to the vehicle’s electri-
3
General warnings and cautions
1. The controller, pulley, cable anchor bracket, cable
housing clamps and the air cylinder are attached with
self-tapping screws. Before attaching these parts, make
certain that the screws will not damage any components or electronics on the other side.
CAUTION
Failure to follow these instructions may cause
non-warranty damage to the vehicle.
2. Route all wiring to avoid the possibility of a short
circuit or other damage to the vehicle.
Route all wiring to avoid moving parts, sharp
edges, the fuel lines or hot components such as
the engine or exhaust system.
Use the included wire ties to secure the wiring
out of the way.
Wiring exposed by moving parts, sharp edges or
hot components may cause a short circuit, which
can result in damage to the vehicle's electrical system as well as other, consequential damage.
Wiring which is attached in close proximity to
the fuel lines may ignite the fuel.
All parts in the interior of the vehicle must be at-
tached so that they will not present an obstruction
or hazard to the driver of the vehicle or interfere
with the operation of the vehicle.
Failure to follow these instructions may cause
a loss of vehicular control, resulting in property
damage, personal injury or even death.
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