FuseMaster 76512
Installation and
Time Tested • Time Proven
operating instructions
854956-04 01/18
ROADMASTER, Inc. 6110 NE 127th Ave. Vancouver, WA 98682 800 -669-9690 Fax: 360-735-9300 www.roadmasterinc.com
Purpose
The FuseMaster 76512 will eliminate the necessity of
removing fuses for towing, then having to reinsert them for
driving. After the installation you will flip a switch to accomplish the same purpose.
This FuseMaster is for vehicles which must have two ATM
mini or two ATM micro fuses (not included) removed. If three
fuses must be removed, combine the FuseMaster 76512 with
one of the single-fuse versions — 76510, 76511 or 76513.
For a vehicle-by-vehicle fit list, visit www.roadmasterinc.
com. Select the “Vehicle-Specific Info” menu tab.
Required tools
• fuse puller (for difficult-to-access fuses)
• power drill with ¾-inch bit or ¾-inch flat auger bit
All specifications are subject to change without notice.
Installation instructions
CAUTION
Read all instructions before installing or
operating this device. Failure to understand
how to properly install or operate the FuseMaster could result in extensive property
damage.
1. Refer to the towed vehicle owner’s manual to determine
which fuse must be removed for towing.
Note: running changes may not be reflected in the owner’s
manual. ROADMASTER recommends calling the dealership to
confirm which fuses must be removed.
2. Remove the access panel and then the fuses.
3. Confirm that the two pairs of silver pins at the end of the
FuseMaster harness are the same size as the pins on the fuses
you removed. The pins must match.
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:
WARNING indicates a potentially hazardous situation which, if not avoided, could result in property
damage, serious personal injury or even death.
CAUTION
CAUTION indicates 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.
Notice
ROADMASTER, Inc. assumes no responsibility for
damage and accepts no liability in any way for the proper
or improper use or installation of this product, including
any warranty claims that may be considered voided by
the towed vehicle manufacturer or for any consequential
damage that may arise from its use.
CAUTION
Do not insert the fuses into the FuseMaster harness
until instructed to do so, or the fuses may blow.
Note: if the fuses are ATM micro fuses, you must purchase
ATM mini fuses of the same amperage to replace them — micro
fuses will not fit in the FuseMaster fuse holders.
4. Insert the silver pins at the end of the FuseMaster harness
into the sockets for the fuses you removed.
Insert the two wires with red shrink wrap into one socket;
insert the other two wires into the other socket.
Gently press the pins down until they are fully seated.
Note: for vehicles with ATM micro fuses (for example, some
Honda models) press the silver pins to the outside edges of the
fuse socket — the sockets for these fuses have the connectors
at the sides.
5. Test-fit the access panel, to ensure that it can be replaced
over the FuseMaster harness.
6. If necessary, use wire ties (not included) to secure the
FuseMaster harness in place.
CAUTION
If the harness is not secured the electrical connection
may be broken, preventing the circuit from functioning.
FuseMaster will not operate.
7. Look for a mounting surface for the switch close to the fuse
box. (The preferred location is on the fuse box access panel).
continued on next page
continued from preceding page
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 to operate.
• The switch must be installed on a plastic surface which is
¼-inch thick or less.
• There must be enough space for the switch.
• There must not be any metal directly behind the mounting
location.
• There must not be any wiring or electrical components directly behind the mounting location.
• You will remove the mounting nut (Figure 1) and the wiring
connectors (Figure 1) to install the switch. You must be able to
reach behind the switch to reattach them.
8. Using a power drill with a ¾-inch bit or a ¾-inch flat auger
bit, drill a hole at the mounting location you have chosen.
9. Remove the four wires from the switch by pulling on the
connectors until they separate from their terminals.
Note: if the connectors are difficult to remove from the
terminals, move them back and forth against the terminals as
you pull out.
10. Remove the mounting nut.
11. Position the switch in the hole, with the blank space (Figure
1) at the top.
12. Reattach the mounting nut, with the serrated side toward
the switch, and hand-tighten it.
13. Reattach the wiring connectors into their terminals on the
switch.
Note: each pair
of wires is bundled together. Connect one
pair of wires to the first
circuit terminals, as
shown to the right, and
the other pair to the
second circuit.
14. Where possible,
slide the black split
loom over the wiring
connections and secure the loom with electrical tape.
15. Tape the wiring if there is any exposed metal in the immediate area of the switch.
16. IMPORTANT — Install the fuses you removed from the
towed vehicle into the FuseMaster holders (Figure 2).
The black pair of wires is connected to the fuse holder
closest to the silver pins (Figure 3); the colored pair of wires
is connected to the other fuse holder. Insert the fuses into the
appropriate fuse holders, as shown in Figure 3.
CAUTION
ALWAYS match the amperage of the fuse in the FuseMaster harness to the fuse removed from the towed
vehicle’s fuse panel. NEVER install a fuse with more than
a 20-amp rating into the FuseMaster harness.
Failure to follow these instructions may cause severe
damage to the vehicle’s electrical components. Other
consequential, non-warranty damage may also occur.
Operating instructions
When the top part of the switch
is depressed it is in the “drive”
position; when the bottom part of
the switch is depressed it is in the
“tow” position, as shown to the
right.
Mount the included “Drive” and
“Tow” stickers at the appropriate
sides of the switch.
Never flip the switch to the “tow” position while driving. If the switch is flipped, the electrical functions of
the switch FuseMaster has replaced will be lost.
A loss of power steering, power brakes and/or a loss
of vehicular control may result.
continued on next page
Figure 1
Figure 2
CAUTION
A blown fuse, significant damage to electrical components or other consequential damage may occur if
the fuses are not inserted into the correct fuse holder.
Confirm that the fuses are fully seated. Replace the protective cap (Figure 2).
Note: if the fuses you removed were ATM micro fuses,
install ATM mini fuses (not included) of the same amperage.
Figure 3
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