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Chapter 3: Wiring the Pathfinder
Horn Ring Transfer
The horn input circuit is designed to allow siren and lighting control from the vehicle horn.
This input is by default set to detect active-low (ground). The horn input can be programmed to
detect an active-high (battery) or active-low (ground). The horn signal event may be available
using FS Vehicle Integration, if so fold and seal the unused leads.
NOTE: To enable horn-ring control of siren tones, obtain a SPST relay of enough contact-
current capacity to activate the vehicle horn:
1. Cut the wire that connects the switch for the vehicle horn ring to the horn or horn relay
(Figure 3.3).
2. Splice the white/yellow wire from the power cable to the horn ring side of the wire
that you cut in step 1.
3. Splice the white wire from the power cable to the horn side of the cut wire.
4. Mount the SPST relay in a suitable location.
5. Connect the horn side of the wire cut in step 1 to the relay-contact terminal.
6. Determine the "sense" of the vehicle's horn ring activation circuit. Does the horn
circuit require a switched positive (active-low) voltage or switched ground (active-high)
for activation?
7. Connect the switched relay-contact terminal to the positive or negative potential you
determined in step 6.
8. Connect the white wire from the power cable to one end of the relay coil.
9. Connect the other end of the relay coil to the opposite potential of that connected to
the switched relay contact terminal in step 7.
Speaker Connections
The Pathfinder is designed to operate with a few different speaker configurations. It can operate
one or two 11-ohm impedance, 100 W speakers. If using two 11-ohm impedance, 100 W
speakers, they must be wired on separate channels of the amplifier and in phase for proper
operation (see Figure 3.1). Alternatively, it can operate one 11-ohm impedance, 100 W speaker
and two Rumbler speakers, without the need for a separate amplifier (see Figure 3.2). By
default, the siren is set for two 11-ohm impedance, 100 W speakers. See the Convergence
Network Configuration Software for all available programming options available for the
Pathfinder tones.
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DETERMINE CURRENT FOR HORN — The horn ring transfer circuit of the
siren can switch a maximum of 5 A. Some vehicles do not have a horn relay
and consequently will draw more than 5 A when the vehicle horn is activated.
Consult your vehicle service manual or a qualified mechanic to determine the
current required to activate the horn. If it is less than 5 A, perform step 3. If it is
greater than 5 A, perform steps 4 through 9.
Pathfinder
TM
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