Cummins/Onan 15.0 HA / 7.5 HA — Printed Circuit Board Tests (Spec C and D)
Testing & diagnosis
For the Cummins/Onan 15.0 HA / 7.5 HA, from the Cummins/Onan service manual.
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Before you start
- The volt-ohm-milliameter used must have batteries of 3 volts or less or diodes on the printed circuit board can be damaged during the tests.
Procedure
- Remove the printed circuit board from the control.
- Check components with an ohmmeter set at R X 100 scale except where noted.
- Always recheck zero setting when changing scale settings.
- Start the tests on the left with the printed circuit board positioned as shown.
- All readings given are approximate.
Tools required
- ohmmeter Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- The volt-ohm-milliameter used must have batteries of 3 volts or less.
Source: Cummins/Onan service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.