Pinpoint Test A3 - Check Control Unit
With ignition switch in the OFF position contact ohmmeter to ground wire terminal eyelet and to ground post on each battery See Fig 1.
If less than 1 ohm, proceed to PINPOINT TEST A4 - CHECK SUPPLY VOLTAGE . If more than 1 ohm, clean or service ground connection, Repeat check and go to PINPOINT TEST A4 - CHECK SUPPLY VOLTAGE .