Directed Electronics READY REMOTE 24927 Owner's Installation Manual page 41

Tachometer Wire
WARNING! In the following procedure DO NOT use
a test light. Use of this type of tester can cause
grounding of sensitive electrical components,
resulting in damage, including damage to the power
train control module. A digital multi-meter is
required to test for this wire.
Do not wear loose clothing that could get entangled
in rotating engine components. Ensure that your
hands and arms are well clear of these rotating
components when working in the engine compart-
ment. Lastly, ensure that all wires and tools are
clear of falling into or entanglement with these
rotating components.
Identify the suspected tach wire according to the web informa-
tion. Next, place the black lead of a MULTI-METER on the nega-
tive battery post and secure it. Put the multi-meter in the AC posi-
tion and connect the probe to the suspect wire with the red lead
of the multi-meter. Then start the vehicle with the key. With the
engine at idle the multi-meter should read from .50 volts to 6
volts, and should fluctuate when you rev the engine.
Have a second person press the gas pedal to increase the RPMs
and watch the meter display. When the RPMs increase the voltage
should rise slightly (not all tachometer outputs will rise when
engine RPM increases). Once the correct tachometer wire has been
identified, turn the vehicle off.
Run the GREEN wire from the 8-pin harness through the firewall
into the engine compartment alongside the hood pin wire. Use the
same procedure as with the hood pin wire and pull the wire
through the grommet, taking extra care to keep it away from any
moving parts or anything that will generate extreme heat. Once
the wire is run into the engine compartment, strip a small portion
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