Federal Signal Corporation e-Q2B, Installation Maintenance And Service Manual

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Chapter 3: Wiring the e-Q2B Siren System
e-Q2B Siren System
29
Connecting the PARK Detection Circuit
The PARK detection circuit sends a signal to the siren amplifier to mute all siren functions when the
vehicle transmission is shifted into park or neutral. The circuit can detect a +12 V signal or a –BAT
signal.
NOTE: The 12-position tension clamp connector accepts 18 AWG to 22 AWG wire. The
recommended length of insulation to strip from the wires for insertion into the connector is
0.275 in (0.7 mm).
To wire the PARK detection circuit:
1. Connect an 18 AWG to 22 AWG lead from Position 2 (
PARK
) on the 12-position connector
to the electrical circuit that pr12 V or –BAT when the vehicle transmission is in park
(Figure 3.12).
2.
Insulate spliced leads with twist-on wire connectors. Fold and seal unused leads. Use wire ties
and hold-downs for strain relief.
3. To prevent fretting or disconnection, tighten the two screws on the 12-position speaker
connector.
NOTE: The PARK detection circuit must be OPEN when the vehicle is NOT in PARK. If
power or ground is detected on the circuit that is CLOSED when the vehicle is not in PARK,
the vehicle operator will not be able to activate any siren tones.
Figure 3.12 Connections for the park detection circuit
REMOTE MIC
RADIO
PARK
2
A/H
4
AUX
6
8
BRAKE
1 33
RING
GRND
10
CYCLE
12
HORN
5
RMBLR
ENBL
RMBLR
RADIO
7
RADIO
9
RADIO
11
12-POSITION
TENSION CLAMP
CONNECTOR
P/N 140584-12
1. INSERT SCREWDRIVER
TO OPEN TENSION CLAMP.
2. SLIP WIRE INTO CONNECTOR.
3. REMOVE SCREWDRIVER TO
LOCK CLAMP ON WIRE.
TO VEHICLE PARK
DETECTION CIRCUIT
INSULATION STRIPPED
0.275 in (0.7 mm)
290A6810