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How to find (+)12V ignition with your multi meter:
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 steering 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.
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