InvisiBrake specifications Table of contents Controller height...........................................2¾ inches Controller width............................................8¾ inches Controller length...........................................8¾ inches Voltage........................................................12 volts DC Fuse size.......................................................... 20 amp Operating temperature range ................................
part number Components 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.........
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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’ at www. roadmasterinc.com. (If you are a professional installer, consult this list often — it is updated constantly.) 2.
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.
Plan the installation Note: the mounting locations of the controller, pulley and air cylinder are dependent on each other — where you choose to attach one affects the mounting locations of the other two. Before attaching any of these components, plan where they will all be attached, by following the steps below. Note: some newer vehicles may require additional equipment. Check the ROADMASTER web site — www. roadmasterinc.com — for vehicle-specific information.
Plan the installation continued from preceding page cessible, to an appropriate power source which will be energized when towing). Since the harness is 15 feet long, the mounting location should be within 15 feet of the battery (or power source). Position the controller at the mounting location you have chosen, but do not attach it — it will be easier to connect the wiring, air line and vacuum line with the controller loose.
Plan the installation continued from preceding page cable aligns directly to the center of the pulley wheel (Figure 5). If the vehicle is equipped with brake pedal presets, install the cable and brake pedal clamp assembly with the brake pedal as close to the driver’s seat as possible. Make certain that the brake pedal is at that position when towing. As an option, the brake pedal may be moved to the desired position and disabled. Do not rely on a mental note to never move the brake pedal.
Plan the installation continued from preceding page This will create a gap between the bracket and the pulley wheel. If the cable should enter this gap it will lock in place, which will cause non-warranty damage to the towed vehicle’s brakes and tires as well as other, consequential damage. Note: if there is no flat surface to mount the pulley due to curves, recesses or obstructions in the firewall, an optional pulley mounting bracket (Figure 7) is available from ROADMASTER.
Begin the installation — attach the brake pedal clamp; attach the pulley; attach the cable anchor bracket Note: do not attach any component until you have chosen mounting locations for the controller, pulley and air cylinder — see “Plan the installation,” beginning on page five. Attach the brake pedal clamp 1. Now that you know where all the cable components go, position the two sections of the brake pedal clamp opposite each other.
Attach the cable anchor bracket continued from preceding page CAUTION Do not allow sharp bends near the cable anchor bracket. Tight bends will create internal friction between the cable and housing, reducing the efficiency of the braking system, and may cause nonwarranty damage. ward until the ball at the end of the cable is clearly visible, as shown in Figure 9. This will allow 1/4" of free play in the cable. 3. With two of the 3/8" self-tapping screws, attach the cable anchor bracket. 4.
Attach the vacuum line Note: the vacuum line is used on vehicles with vacuum-assisted power brakes. If the vehicle has a fulltime (“active”) power braking system it will not have a power brake booster (Figure 13). Accordingly, there is no need to install any of the components in this section. Leave the vacuum port as is and proceed to the next section — “Check the existing lighting.” 1.
Check the existing lighting In order for InvisiBrake to function properly, the lighting systems on both vehicles must also function properly. 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 motorhome. 3. Position the vehicle behind the motorhome and connect the tow lighting electrical cord between the two vehicles.
Attach the four-wire flat harness; attach the controller Note: the following wiring instructions are based on a typical connection from the motorhome. For other wiring applications, contact ROADMASTER. CAUTION If the towed vehicle’s turn signals, taillights and brake lights have been wired for towing, the connection you are about to make to the aftermarket tow light harness must be upstream of the wiring diodes. If it is not, InvisiBrake will not function properly.
Attach the controller continued from preceding page flanges (Figure 18) is attached to the controller. Slide the flange under the carpet. Repeat for the remaining side; with a pair of pliers bend this flange down 45º and slide it under the carpet. Press down on the controller above the flange to straighten the flange and secure the controller. 6. You will test and adjust for proper braking pressure in a later step.
Install the monitor system continued from preceding page the vacuum line, cable housing and the electrical wiring from the controller. Install the monitor system in the motorhome Note: some motorhomes are manufactured with auxiliary wires pre-strung from the rear of the motorhome to the dashboard — if the motorhome has such a wire, use it instead of the 50-foot wire included in the kit, which will save time. Refer to the motorhome owner’s manual or call the dealership. 1.
Test the system; evaluate the brake pressure setting Test drive the motorhome Drive the motorhome for a short distance, making a few stops. Get a good feel for the motorhome's braking ability. Later, you will compare how the motorhome brakes by itself with how it brakes with the towed vehicle and InvisiBrake. Connect the vehicles for towing 1. According to the manufacturer, make all adjustments necessary to prepare the vehicle for towing.
Test the system; evaluate the brake pressure setting brake failure, resulting in property damage, personal injury or even death. continued from preceding page • Brake pressure set too high — a sharp pull at the motorhome indicates that the brake pressure is set too high — in this case, you may choose to lower the setting until the towed vehicle brakes with less force. See “If necessary, change the brake pressure setting,” below. Finish the installation The installation and tests are complete.
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