Installation guide

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.

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 system 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 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.

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.

Most vehicles use a (+) parking light circuit. The (+) parking light wire is often found near the light switch. In

many vehicles the light switch is built into the turn signal lever; in these vehicles the parking light wire can be

found in the steering column. The same wire can often be accessed in the kick panel or running board.

NOTE: Many Toyotas and other Asian vehicles, send a (-) signal from the switch to a relay. The

relay then sends (+)12V to the bulbs. Whenever you have difficulty finding a (+) parking light wire

near the switch, simply test the wires at any switch or control panel that is lit by the instrument

panel lighting. Remember, you need a (+) parking light wire that does not vary with the dimmer

setting.

How to find a (+) parking light flash 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 parking light wire. Usually, the area near the headlight/parking light

switch is an excellent area to start, as is the kick panel.

finding a (+/-) parking light wire

finding the starter wire