CAR ALARM AND REMOTE START INSTALLATION GUIDE
Copyrght 2002-2004 Triple S Customs 37
WARNING! Do not test tachometer wires with a test light or logic probe. The vehicle WILL BE DAMAGED.
To find a tachometer wire with a multi-meter:
1. Set meter to AC voltage.
2. Attach the (-) probe of the meter to chassis ground.
3. Start and run the vehicle
4. Probe the wire suspected of being the tachometer wire with the other probe.
5. If this is the correct wire, the meter will read between 1V and 6V.
? Having trouble finding a tachometer wire?
• On some vehicles, the ignition coil may be difficult to reach.
• Many vehicles have a tachometer wire available behind the instrument cluster.
• A fuel injector wire can also be used for a tachometer signal on most vehicles. Each injector will have two
wires. Use the wire that is not common. For example, at one injector the wires may be BLACK/WHITE and
RED. At the next injector the wires may be GREEN/WHITE and RED. At the next injector the wires may be
BLUE/RED and RED. At the next injector wires may be PURPLE/WHITE and RED. In this case you would
use any wire that is not RED.
TESTING THE HOOD PIN WIRE
• Generally, models equipped with a factory security system have a factory hood pin switch.
• This wire can often be found at the factory anti-theft unit or at the hood pin switch.
To find the hood pin trigger wire with your multi-meter:
1. Set to DC voltage
2. Attach the (+) probe to 12V constant
3. Probe the wire you suspect of being the hood trigger wire with the (-) lead
4. The meter should indicate 12V with the hood open if you have found the correct wire
5. The meter will then read 0V when the hood is closed.
TESTING THE IGNITION WIRE
• The ignition wire is often found in the harness coming from the key cylinder.
• This wire is powered when the key is in the run or start position.
• This wire powers the ignition system and the fuel delivery system.
To find 12V ignition with a multi-meter:
1. Set meter to DC voltage
2. Attach the (-) probe of the meter to chassis ground
3. Probe the wire you suspect of being the ignition wire with the (+) probe. The steering column harness or
ignition harness is an excellent place to find this wire.
4. Turn the ignition key to the run position. If your meter reads 12V go to the next step
5. Turn the key to the start position. The meter should remain steady. If it drops close to or all the way to zero,
that is not the correct wire. Go back to step 3. If it stays steady at 12V that is the ignition wire.
NOTE: Some vehicles have more than one ignition wire that must be energized for the remote start process in
order for the vehicle to run properly. If the system only has one (+) ignition output, use a relay for each additional
ignition wire that must be energized.
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