Finding The Starter Wire - Clarion SR1000 Installation Manual

How to find (+)12V ignition 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 ignition wire. The steer-
ing column harness or ignition switch harness is an excellent
place to find this wire.
4. Turn the ignition key switch to the run position. If your meter
reads (+)12V, go to the next step. If it doesn't, probe another wire.
5. Now turn the key to the start position. The meter display should stay steady, not dropping by
more than a few tenths of a volt. If it drops close to or all the way to zero, go back to Step 3. If
it stays steady at (+)12V, you have found an ignition wire.

finding the starter wire

The starter wire provides 12V directly to the starter or to a relay controlling the starter. In some vehi-
cles, it is necessary to power a cold start circuit. A cold start circuit will test exactly like a starter cir-
cuit, but it does not control the starter. Instead, the cold start circuit is used to prime the fuel injection
system for starting when the vehicle is cold.
How to find the starter wire with your multimeter:
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.
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 steering
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.