Clarion Ungo Pro Security RK1, Installation Manual

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8
finding the starter wire
The starter wire provides 12V directly to the starter or to a relay controlling starter. In some vehicles,
it is necessary to power a cold start circuit. A cold start circuit will test exactly like a starter circuit,
but it does not control the starter. Instead, the cold start circuit is used to prime the fuel injection sys-
tem for starting when the vehicle is cold.
How to find the starter wire with your multimeter:
1. Set to DCV or DC voltage (12V or 20V is fine).
2. Attach the (-) probe of the meter to chassis ground.
3. Probe the wire you suspect of being the starter wire. The steer-
ing column is an excellent place to find this wire. Remember you
do not need to interrupt the starter at the same point you test it.
Hiding your optional starter kill relay and connections is always recommended.
4. Turn the ignition key switch to the start position. Make sure the car is not in gear! If your meter
reads (+)12V, go to the next step. If it doesn’t, probe another wire.
5. Cut the wire you suspect of being the starter wire.
6. Attempt to start the car. If the starter engages, reconnect it and go back to Step 3. If the starter
does not turn over, you have the right wire.
finding a (+) brake light wire
Most vehicles use a (+) brake light circuit. The (+) brake light wire is often found near the brake
pedal. The same wire can often be accessed in the kick panel or running board.
How to find a (+) brake light wire with your multimeter:
1. Set to DCV or DC voltage (12V or 20V is fine).
2. Attach the (-) probe of the meter to chassis ground.
3. Probe the wire you suspect of being the brake light wire.
4. Press the brake pedal. If your meter shows (+)12V, release the brake pedal and make sure it goes
back to zero.
5. If it does return to zero, this is the correct brake wire.