Roadmaster 76515, 76517 Installation Instructions Manual

FuseMaster 76515 and 76517

Installation

Time Tested • Time Proven

855406-04 02.18

ROADMASTER, Inc. 6110 NE 127th Ave. Vancouver, WA 98682 800 -669-9690 Fax: [phone] roadmasterinc.com

Purpose

FuseMasters 76515 and 76517 eliminate the necessity of
manually removing a fuse for towing, then having to reinsert it
for driving. After the installation you will press a switch to ac­complish the same task.
Note: the only difference between these two FuseMasters

is the fuse holder on the harness.
Note: part number 76515 will remotely disconnect one maxi
fuse. If two maxi fuses must be removed for towing, you will
also need to install part number 76515-10 (sold separately).

CAUTION

Read all instructions before installing or
operating this device. Failure to understand
how to properly install or operate FuseMaster
could result in extensive property damage.

Installation instructions

1. Remove the plastic cover for the fuse block. Pull the fuse
identified in the owner’s manual as the one to remove for towing.
Mark the plastic cover directly over the two sockets ex­posed by removing the fuse.

2. The fuse controller (Figure 1) will be mounted in the engine

Required tools and supplies

• volt meter or test light

• power drill with 1/4", 3/8" and 13/16" bits

• silicone sealant

All specifications are subject to change without notice.

compartment and the switch (Figure 2) will be mounted in the
passenger compartment. Choose mounting locations for both
before attaching either one:
2a. Find a mounting location for the controller which meets
the following conditions:

• The controller must be mounted close enough to the
fuse block so that the large red and black wires (Figure 1) will
reach the fuse block.

• The controller location must not interfere with the opera­tion of the vehicle in any way.

• Do not mount the controller closer than eight inches
from the exhaust system.

• The controller may be attached with the two self-tapping
screws, with the pre-attached adhesive pad or with zip ties.
If the screws are used, the underlying material must be
of sufficient strength to hold the controller in place. Make certain
that the screws will not damage any components or electronics
on the other side.
2b. Find a mounting location for the switch which meets the
following conditions:

• Choose a location where the switch will be accessible.

• The switch harness will be routed through the firewall to
the fuse controller. The mounting location for the switch must be
close enough for the end of the harness to reach the controller.
Look for a direct route through a pre-drilled (or pre­scored) hole in the firewall, 1/4" wide or larger. If there is no
pre-drilled hole, you must drill a hole through the firewall. (If
you must drill an access hole, make certain that you will not
damage any components or electronics on the other side.)

• The switch must be installed on a surface which is 1/8"
thick or less.

instructions

continued on next page

Figure 1

Figure 2

continued from preceding page

• The switch must not interfere with the operation of the
vehicle in any way.

• There must be enough space for the included ‘tow' and
‘drive' decals, which will be attached in close proximity to the
switch.

3. The large red and black wires will be routed through two
3/8" access holes in the fuse block cover.
Drill the holes in the fuse block cover, over the points you
marked in step 1.

4. Put the vehicle in ‘tow’ mode. Connect a volt meter or test
light between the fuse socket and ground. Find which one of
the fuse sockets has voltage with the vehicle in ‘tow' mode.
Insert the blade (Figure 1) of the large red wire through the
hole in the cover and into the socket that registers voltage.

CAUTION

If the blade on the red wire isn't inserted into the socket
that registers voltage, FuseMaster will not function.

Insert the blade of the large black wire into the other socket.

5. Gently press the blades down until they are fully seated,
and replace the fuse holder cover.

6. Push the grommets (Figure 1) into the access holes until
they snap in place.

7. In the passenger compartment, drill a 13/16" hole for the
switch at the mounting location you chose earlier.

8. Route the harness through the hole to the fuse controller.
Insert the switch into the hole. It will snap into place when the
edge of the switch is flush to the mounting surface.

9. Use one or more of the included zip ties, if necessary, to
secure the harness.

10. Using the two self-tapping screws, the adhesive pad or zip
ties, attach the fuse controller at the location you chose.

11. With the two included red butt connectors, connect the
red and black harness wires to the twisted pair of red and black
wires on the fuse controller (Figure 3). Match color to color.
Use the ring terminal to attach the white wire on the har­ness to any good chassis ground.

12. Install the small fuse holder — crimp the included ring ter-
minal onto the small fuse holder; attach the small fuse holder
to the controller as shown in Figures 1 and 3.

13. Seal the harness at the firewall with silicone sealant (not
provided).

Note: failure to seal the hole may allow water into the pas­senger compartment, as well as allowing the wires to chafe or
short out.

14. Insert the fuse you removed in step 1 into the large fuse
holder (Figure 1), and close the protective cap over the fuse
holder.

15. Press the momentary switch and release. With a volt meter

or test light, check to see if voltage registers on the large black
wire on the controller. If it does, the vehicle is in the ‘drive’ mode.
If it does not, the vehicle is in the ‘tow’ mode.
Position the ‘Drive’ and ‘Tow’ stickers at the appropriate
sides of the switch.
Note: the switch may be rotated to be in line with the de-

cals.

16. Test the system, as described in the next section.

Test the system

1. Follow each of the steps in the owner's manual up to the
point where it tells you to remove the fuse.

2. Verify there is voltage on the large red wire at the control­ler. If not, be sure the fuse is installed in the FuseMaster fuse­holder. If still no voltage, check for proper connection of this
wire to the socket. Remember this is the socket that registered
voltage when the car was in ‘tow' mode.

3. Once you've verified voltage is present on the large red
wire, test for voltage on the large black wire at the controller. If
there is no voltage, rock the switch to the ‘drive' position. You
should now have voltage. If not, check the fuse on the orange
wire. If voltage is still not present on the large black wire, then
rock the switch to ‘tow' position. If voltage is now present, the
labels are reversed. Simply rotate the switch 180 degrees.

4. If you have voltage on the large red and large black wire
at the controller, then you are in ‘drive' mode and the vehicle
should start. If not, verify the large black wire is inserted prop­erly into the fuse block.

5. FuseMaster is operating properly if each of the above
conditions are met. When done testing, be sure to follow the
directions in the owner's manual to put the vehicle back into
‘drive' mode.

Figure 3