MAN 650066:E
31
Setting the time
Through lens:
Using a small, thin object such as a pen or hairpin, press “set” buttons through front lens access holes. If
the access holes are on the right side of the lens, then the top “set” button advances hours and bottom “set” button
advances minutes. If the access holes are on the bottom of the lens, then the left “set” button advances hours and
the right “set” button advances minutes.
Remote switches:
Some systems may have two push button switches for setting the time. These switches can be mounted
anywhere for easy access. They are provided on system where the holes in the lens may not be accessible. The
switches are just momentary push buttons, a press and release will either advance the hours or minutes. The
BLACK “set” button advances hours, the RED “set” button advances minutes. Each time that you make a change
to either the hours or minutes, the seconds are reset to zero.
Adjusting the accuracy:
The clock is accurate to +/-2 minutes a month as it is set, but it can be tuned for better accuracy if desired.
Press and hold both of the set buttons for several seconds. The clock will display “C 0”. The “C” indicates that it is
in the calibration mode and the second number is the current calibration value. The calibration value indicates the
number of seconds to add or subtract each day. The clock can be adjusted from +7 sec/day to -7 sec/day.
Press the minute set button to change the cal value. Press the hour set button to return to normal clock
operation.
Clock technical specifications
Minimum operating voltage
-
7 volts
Maximum operating voltage
-
18 volts
(Operating at or near maximum rating for an extended time can damage unit)
Clock
accuracy
-
±
2 minute per month
Typical current draw (@ 13.8V) -
0.13 A
Standby current draw (key off) -
0.002 A
Troubleshooting guide
Problem Possible
cause
Solution
Clock will not light up
Red wire does not have
Connect to a location that has power
power.
when the key is on.
Orange wire does not have
Connect to a location that has power
power.
all
of
the
time.
Black wire is not getting
Connect ground to a different location.
a
good
ground.
Power is reversed.
Connect black to negative ground, red and
orange
to
+12V
power.
Clock is damaged.
Return clock for repair. (see instructions)
Clock will not turn off when
The red and orange wires
Connect the red to switched power, the
the key is off.
are reversed.
orange to constant power.
Clock lights up, but does
Loose connection on orange
Reconnect orange wire.
not read correctly.
power wire.
Poor ground connection.
Move ground to different location
Time is not set.
Set time. (see instructions)
Clock is damaged.
Return clock for repair. (see instructions)
Clock will not keep time.
Orange wire does not have
Connect to a location that has power when
constant power.
the key is on or off.
Loose connection on orange
Reconnect orange wire to constant power.
power
wire.
Poor ground connection.
Move ground to different location
Clock will not dim.
Blue wire is not connected
Check wiring connections.
correctly.
Clock remains dim at all
Blue wire is getting power
Connect blue wire to location that only
times.
all of the time.
has power when the headlights are on.
Battery is very low.
Recharge or replace vehicle battery.
Clock is damaged.
Return clock for repair. (see instructions)
