Auto Meter 6002 - Manual (Page 52)

Chapter 6. Troubleshooting
46 Street Dash Users Guide
No. Symptom Possible Cause Remedy Notes
Incorrect wiring Reconnect the
tachometer as
specified in this
manual 22 Tachometer
reading erratic,
pointer jumps high
or low
Signal from ignition
system or coil is
noisy Condition the ES
signal by placing a
resistor in line with
the ES wire Resistor
values: 10K
ohms for
dedicated
tach output;
47K Ohms
for coil
connection
(Non-CDI);
100K Ohms
for coil
connection
(CDI).
Resistors
1/2W 5%
350v
23 Displayed speed
value too high or
too low by a
constant %-age
amount.
System configured
with wrong number
of targets per wheel
revolution
Reconfigure the
system with correct
values
System configured
with wrong
circumference.
Faulty sensor
and/or wiring Check sensor
indicator for correct
operation Rotate the
wheel by
hand and
check that
the sensor
indicator
lights up as
each target
passes the
sensor 24 No speed reading
Speed reading
erratic, value jumps
high or low
1. Pulse
amplifier not
connected
2. Pulse
amplifier out
of adjustment
Rotate wheels and
check the LED on
theVSS Pulse
Amplifier for pulse
signals