Roadmaster AddaBRAKE 8800 - Attach Brake Signal Wire and Install LED

Install the motorhome monitor
wiring harness in the towed vehicle
continued from preceding page
Note: if you choose this method, keep the patch
cord. If a second towed vehicle is added later, it may
not have an open terminal available on the electrical
socket.
2. Oncethefemalebulletconnectorisattached,route
the monitor wiring harness through the engine com-
partment, to the driver’s side of the firewall. Use the
same routeas the break away wiring harness, ifthat
is convenient. As before, avoid lines, hoses, moving
parts or “hot” components such as exhaust systems.
Where appropriate,usewiretiesto securethewiring
harnessinplace.
3. Routethemotorhomemonitorwiringharnessthrough
thesameholeasthebreakawaywiringharness(Step
A).
4. Next,locatethetowedvehicle’sbrakelightswitch
and,withatestlight,find the“cold”sideof thebrake
light switch — the “cold” side of the switch does not
register voltage unless the brakes are applied. With
a12-voltmeter,verifythatyouhavefound12VDC
+
.
Then,removethevehicle’sbrakelightfuse,locatedin
thevehicle’sfusepanel.
Failure to remove the brake light fuse from the
vehicle’s fuse panel may cause the vehicle’s theft
deterrent system, or other electrical system indica-
tors, to be activated if the brake pedal is depressed
during the installation. This may require non-war-
ranty repair to the vehicle.
5. Cutthebrakelightwire,afewinchesdownstream
fromthe“cold”sideofthebrakelightswitch.
If the Brake-Lite Relay is required…
(seetheprevioussection—“Modifications
tothetowedvehicle’slightingsystem”)
  Install the Brake-Lite Relay now. The installation
instructionsareincludedwiththerelay.AftertheBrake-
LiteRelayisinstalled,proceedtoStepD—“Attachthe
brakesignalwire.”
Note: do not install the Brake-Lite Relay unless it
is required. Refer to the previous section — “Modifica-
tions to the towed vehicle’s lighting system.”
If the Brake-Lite Relay is not required…
(seetheprevioussection—“Modifications
tothetowedvehicle’slightingsystem”)
6. Ifnecessary,trimthemonitorwiringharness,then
attach the monitor wire to the brake light wire, using
thesuppliedyellowbuttconnector.
7. Ensurethatthemonitorwiringharnesswillnotpres-
entanobstacleorhazardtothedriverofthevehicle,
orinterferewiththeoperationofthevehicle.Useone
or more wire ties, if necessary, to secure the wiring
harnessoutoftheway.
8. Reinstallthebrakelightfuse,whichyouremoved
instep4.
Step D
Attach the brake signal wire
 Thebrakesignalwireisattachedtothebrakelight
wire(s)inthetowedvehicle’selectricalharness.When
the brake signal wire is connected to AddaBRAKE
(alongwiththe other components ofthebraking sys-
tem), AddaBRAKE will be activated when the towed
vehicle’sbrakelightsareactivated.
Note: the brake signal wire is a six-foot length of
green wire, with a female bullet connector at one end.
1. Chooseaconvenientpointonthetowedvehicle’s
towlightharnesstoattachthebrake signalwire,and
removetheprotectiveloomcoveringthatsectionofthe
harness.
2a. Ifthetowedvehiclehascombinedbrakeandturn
signallights(Figure2)…
• Cuttheyellowwire(leftturn/brake)ontheharness,
and attach the ends with one of the supplied yellow
butt connectors(Figure3). Repeatforthe greenwire
(rightturn/brake).
• Then,runasmalllengthofthesuppliedwirefrom
bothbuttconnectors(Figure3),andattachbothwires
totheinputsoftheincludeddiode(Figure3)withtwo
ofthesuppliedspadeconnectors.
2b. Ifthetowedvehiclehasseparatebrakeandturn
signallights(Figure2),theconnectionisthesameas
above,exceptthatonlyonewire(thebrakelightwire)
isattachedtothediode…
• Withatestlight,determinewhichofthewiresinthe
towlightharnessisthebrakelightwire—whenthetest
lightisconnectedtothebrakelightwire,thetestlight
will illuminate when the motorhome’s brake pedal is
depressed.
• Cutthebrakelightwire,andconnecttheendswith
oneoftheincludedyellowbuttconnectors.
• Then,runasmalllengthofthesuppliedwirefrom
the butt connector, and attach the wire to the diode
with another spade connector. Use either one of the
twoinputs;leavetheotherinputempty.
continued on next page
INITIAL INSTALLATION
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