Roadmaster 766 User manual

Installation Instructions
Remote Battery Disconnect
part number 766
ROADMASTER, Inc. 6110 NE 127th Ave. Vancouver, WA 98682 800-669-9690 Fax: [phone] www.roadmasterinc.com
All specifications are subject to change without notice.
Note: Do not use this product on vehicles with diesel
engines, as they draw too much current and will cause non-
warranty failure of the solenoid — use the 767 Manual Battery
Disconnect instead.
CAUTION
Not for use with all vehicles. Intended only for use on
vehicles whose batteries must be disconnected for towing,
as per the owner’s manual.
Failure to verify the safety of disconnecting the battery
cables or failure to follow the owner’s manual instructions
for towing may cause non-warranty damage to the vehicle’s
components.
It is the owner’s responsibility to make certain that the
battery cable can be safely disconnected for towing, and
that all instructions in the vehicle owner’s manual regard-
ing towing are followed.
CAUTION
The Remote Battery Disconnect is a convenient way to
disconnect the vehicle’s battery; however, disconnecting
a vehicle’s battery will affect the vehicle’s electronics —
• You may need to reset dashboard presets, such as
radio presets or seat and brake pedal presets.
• You may need to re-wire aftermarket electrical acces-
sories, such as supplemental braking systems.
• Vehicles equipped with a Roadmaster braking sys-
tem will require a brake light switch connected to the
positive post on the vehicle’s battery. Otherwise, the
motorhome monitor will not indicate braking activity.
Severe damage to the towed vehicle’s brakes may result.
continued on next page
Time Tested • Time Proven
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:
WARNING indicates a potentially hazardous situation
which, if not avoided, could result in property damage,
serious personal injury, or even death.
CAUTION indicates a potentially hazardous situation
which, if not avoided, may result in property damage,
or minor or moderate personal injury.
CAUTION
CAUTION used without the safety alert symbol in-
dicates a potentially hazardous situation which, if not
avoided, may result in property damage.
NOTE
Refers to important information and is placed in italic type.
It is recommended that you take special notice of these
items.
8 55 476 -11 0 6. 23
Remote Battery Disconnect wiring
Not to scale; please see the instructions
for complete information.

4. Disconnect the positive cable from the battery. Attach the
cable labeled “BATTERY POST” to the positive terminal on the
battery.
Note: If a stop light switch or other accessory must be
energized while towing, make sure to connect the accessory
to the positive side of the battery. DO NOT CONNECT ANY
ACCESSORIES TO THE SOLENOID.
5. Slide the provided section of shrink tubing (Figure 2) over
the cable labeled “POSITIVE CABLE.” Then attach this cable
to the positive cable you just removed from the battery: align the
two ends of the cables so they match. Connect the two cables
together as shown in Figure 2.
Note: It is imperative that the star washers are positioned
as shown.
Note: If the end of the vehicle’s battery cable has a diameter
smaller than 5/16", use a 5/16" drill to enlarge it.
Figure 1
continued from preceding page
Installation
1. Follow the vehicle manufacturer’s instructions to disconnect
the negative battery cable.
2. Choose a mounting location for the solenoid (Figure 1)
inside the engine compartment. This mounting location must
meet the following conditions:
• The mounting point must have a surface of sufficient
strength to hold the solenoid firmly in place.
• There are two cables attached to the solenoid. The end
of the cable labeled “BATTERY POST” must be within reach
of the vehicle’s positive battery post.
• The solenoid will be attached with the two included bolts
and nuts. Make certain that the bolts will not damage any com-
ponents on the other side.
• The solenoid must be grounded by using the provided
white ground wire. Make certain a good ground is available
within two feet of the solenoid.
• The solenoid must be mounted in a location where it is
protected from direct road spray.
• The black tip of the solenoid MUST be pointed downward.
3. Position the solenoid at the mounting location you have
chosen. Drill two ¼" holes for the bolts through the pre-drilled
holes (Figure 1) and attach the solenoid.
Also attach the white ground wire to any good chassis
ground with the included ring terminal and self-tapping screw.
If the cables must be rotated on the solenoid post, then
FOLLOW THESE INSTRUCTIONS CAREFULLY! Put a
wrench on the inside nut and use it to hold the inside nut in
position. Now, loosen the outside nut with a wrench, reposi-
tion the cable and retighten while carefully holding the inside
nut in position. Rotating the inside nut WILL CAUSE NON-
WARRANTY FAILURE of the solenoid.
CAUTION
You WILL destroy the solenoid unless you hold the in-
side nut stationary and ONLY rotate the outside nut. This
damage will not be covered by warranty.
Figure 3
Figure 2
6. Slide the shrink tubing
over the connection as shown
in Figure 3. Be certain no metal
is exposed. Seal the shrink tub-
ing with a heat gun or similar
device.
CAUTION
Make certain that no metal
is exposed on either side of
the shrink tubing. If metal is
exposed, a short circuit may
cause an electrical fire, which
may result in severe damage
to the vehicle.
7. Attach the provided protective loom to both cables.
CAUTION
In order to prevent damage from a short circuit,
cover both cables with the included protective loom. If the
cables are not covered, a short circuit may cause an electri-
cal fire, which may result in severe damage to the vehicle.
Note: Roadmaster recommends using an anti-corrosion
battery terminal spray on all exposed connections.
continued on next page

continued from preceding page
8. Look for a mounting surface for the switch (Figure 4) inside
the passenger compartment. This mounting surface must meet
the following conditions:
• Choose a location where the switch will not be turned on or
off accidentally, but where it will be accessible.
• There must be enough space for the switch and pigtail.
• You will remove the mounting nut to install the switch. You
must be able to reach behind the switch to reattach it.
• There must not be any metal, wiring or electrical compo-
nents directly behind the mounting location.
• Since the harness is 10 feet long, find a location within 10
feet of the solenoid.
9. Route the two-wire harness from the solenoid to the loca-
tion you have chosen for the switch. Cut the harness to length.
Then, using the schematic on page 1 as a guide, attach the
wiring harness to the pigtail using the two red butt connectors.
Route the wiring harness to avoid moving parts, sharp
edges, the fuel lines or hot components such as the engine
or exhaust system.
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.
Failure to follow these instructions may cause property
damage, personal injury or even death.
10. Remove the mounting nut from the switch.
11. Drill a 5/8" hole at the mounting location you have chosen.
With the mounting nut on the underside, route the two-wire har-
ness through the mounting nut and the hole. Plug the switch
into the pigtail as shown in the schematic on page 1. Secure it
with the mounting nut.
12. Use one or more of the included wire ties, if necessary, to
secure the harness in place.
13. Following the manufacturer’s instructions, reattach the
negative cable to the vehicle’s battery.
14. Insert the 7.5-amp fuse into the fuse holder (Figure 1).
Operating the battery disconnect…
1. Attempt to start the vehicle. If the vehicle starts, the battery
disconnect is in the “drive” mode. If it does not start, the battery
disconnect is in the “tow” mode.
Press the button to switch between “drive” and “tow.”
2. To tow the vehicle: follow the owner's manual instructions
to tow. At the point the manual instructs you to disconnect the
battery, push the button to “tow.”
To drive the vehicle: follow the owner's manual instructions
to reconnect the battery. At the point the manual instructs you
to reconnect the battery, press the button to “drive.”
Never operate the battery disconnect in any other way
except as instructed above. Pushing the battery disconnect
switch randomly may damage the vehicle's transmission,
electronics or other systems. Other consequential, non-
warranty damage may also occur.
If the vehicle is being driven, pushing the battery discon-
nect switch may cause a loss of vehicular control, resulting
in property damage, personal injury or even death.
To attach aftermarket accessories…
Attach aftermarket accessories, such as the BrakeMaster
break away switch, to the positive post on the vehicle's battery.
OWNER MUST READ AND FOLLOW THE
BELOW INSTRUCTIONS BEFORE
OPERATING THE BATTERY DISCONNECT
1. IMPORTANT! Never disconnect the battery while the
engine is running. This could result in the illumination of a
'Check Engine Light,' necessitating a dealership to reset it.
2. Do not turn the switch ON or OFF within a 30 second
time period. Many newer vehicles have diagnostic tests that
must be run during an initial start-up. If interrupted, this could
cause the system to malfunction.
3. When disconnecting the battery for dinghy towing, follow
the instructions in the vehicle owner's manual step by step.
At the point in which the manual instructs you to disconnect
the battery, turn the battery switch to the OFF position. When
the owner's manual directs you to reconnect the battery, only
then should you turn the switch to ON. Connecting or discon-
necting the battery out of the proper sequence can result in
significant, non-warranty damage to the vehicle's transmis-
sion or other important systems.
Failure to follow the procedures above may result in
significant, non-warranty damage to the vehicle.
CAUTION — DON'T LOCK YOURSELF
OUT OF THE VEHICLE!
If your vehicle has keyless entry or has other powered
features that could inadvertantly lock you out without
access once the battery has been disconnected, utilize a
manual key option or roll down the window first.
Refer to your owner's manual for information on how to
handle a dead battery situation, as this will be similar.

ROADMASTER manufactures a wide variety of components designed for vehicle-specic towing applications. More components are available at tmaster.roadmasterinc.com, or call Technical Support at 800-669-9690.
Vehicle-specific components
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Charge Line Kits
Brake light switches
Why do you need a brake light
switch? Brake light switches are
necessary only if you’re install-
ing a supplemental braking sys-
tem monitor, and the vehicle’s
OEM brake light switch doesn’t
work when the vehicle is in ‘tow’
mode.
This switch is only activated when the brake pedal is de-
pressed. No other manufacturer provides brake light switch-
es with this level of specicity. Why? When you know when
the towed vehicle’s brake pedal is depressed and released,
you know if the supplemental braking system is positioned
properly and working as it should.
• Works on any vehicle with a brake pedal.
• Works with any supplemental braking system that
moves the brake pedal.
• Works with any motorhome monitor
751000 Universal brake light switch
• Truly universal — works with all braking
systems that depress the brake pedal.
• Exceptional range and reliability — line-
of-sight transmission conrmed to 1,000
feet; proprietary send/repeat circuitry
conrms each signal at 100% reception.
• Protects the towed vehicle’s brakes —
reports any braking activity to the motorhome monitor; in-
cludes a low-battery alert, extended braking and break-away
alarms, and ve other audio and/or visual alarms and system
status notications.
• 30-minute installation, all at the towed vehicle; simply plug
the motorhome monitor into any 12-volt outlet.
• Automatic operation — activates only when the vehicles are
connected for towing.
Specications — frequency: 923 MHz; voltage: 12V; sleep
current: 30mA
9530 Universal supplemental braking system monitor
Wireless supplemental
braking system monitor
How about if you never had to spend another minute with your face on the oor
mat, gazing up into a black void, hunting for a miniscule piece of plastic playing hide
and seek? You don’t have to.
FuseMaster
76511
• You've spent enough time with your face on the oor mat.
• Adventures in electricity can be, well, electrifying.
• Chiropractors are expensive.
• Engine lubricant is not a fashion accessory.
FuseMaster eliminates the necessity of having to remove a fuse for towing, then hav-
ing to reinsert it for driving. After it’s installed, you simply ip a switch to accomplish
the same task.
76511 15-amp fuseholder 76512 Two 7.5-amp fuseholders
76514 Two 15-amp fuseholders 76515 30-amp fuseholder
76517 50-amp fuseholder
Many current vehicles have features that slowly drain the battery
while in tow mode.
These simple, easy-to-install kits help maintain the vehicle’s battery
charge while in tow, supplying up to 15 amps of current. They also
extend battery life by providing a constant maintenance charge (with-
out overcharging the battery) during towing. Installation hardware in-
cluded.
• Heavy-duty 14-gauge wire (156-25) or 12-gauge (156-75) wire
• Includes a thermal circuit breaker — no need to hunt down a
blown fuse
156-25 Towed vehicle charge line kit
156-75 Motorhome charge line kit
156-75