16
The TAP II functions can also be activated by
depressing the MANUAL SIREN switch, as shown
below:
1st Tap
2nd Tap
Selector
(MANUAL)
(MANUAL)
WAIL
Yelp
Wail
YELP
Priority (HI-LO)
Yelp
PRTY
Air Horn
Air Horn
NOTE:
Peak-and-hold siren and air horn are the
“Press and Hold” features.
4-7. AUX IN FUNCTION
If installed, set the selector to switch to the MAN
position. Activate the installed auxiliary switch to
sound the wail tone. To deactivate the wail tone,
move the selector switch to the WAIL position and
back to the MAN position.
4-8. AUX OUT FUNCTION
If installed, this function will activate warning
lights any time wail, yelp, or priority (HI-LO) is
sounding.
4-9. SPEAKER DIAGNOSTIC TEST
To test the speakers, set the selector switch to
RAD. Press the AIR HORN/MANUAL paddle
switch down. Four rapid beeps should be heard and
the yellow LEDs should flash four times. Note that
the yellow LEDs will illuminate when a siren tone
is sounding.
4-10. PARK-SIREN DEACTIVATOR
If installed, shifting the vehicle into PARK will
silence the siren tones. Move the shift lever to
another position to sound the siren tone.
4-11. PA AND RADIO GAIN ADJUSTMENT
The PA4000 comes from the factory with the PA
and radio gain set to maximum. To decrease the
gain settings, proceed as follows while referring to
figure 3-1.
1. Locate the PA and radio potentiometers on the
logic PC board near the RJ45 jack.
2. Using a small flat blade screwdriver, rotate the
appropriate potentiometer to a desired volume
setting.