Module Output Check
- Connect positive lead of voltmeter to "TACH" terminal of ignition coil and negative lead to engine ground. Ground distributor cap end of coil high tension wire. Set voltmeter to 50V DC range.
- Crank engine and while cranking, switch voltmeter to 2V DC range. Observe reading and reconnect coil wire to distributor.
- If voltmeter needle oscillates, proceed to "Ignition Coil Primary Resistance Check ". If needle does not oscillate, proceed to "Module Input Check ".
NOTE:
If voltmeter testing does not obtain a usable conclusion, substitute a 12V DC test light. If light flashes, module output is OK.