Cummins/Onan 15.0 HA / 7.5 HA — Bilge Blower Time Delay Test
Testing & diagnosis · Bilge blower time delay relay
For the Cummins/Onan 15.0 HA / 7.5 HA, from the Cummins/Onan service manual.
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Procedure
- Before testing the timer, check the 6.25-ampere fuse to see if it has blown.
- Connect a DC voltmeter between B+ and time delay terminal 3 on the terminal block.
- At the end of the time delay, the voltmeter should indicate battery voltage.
- The DC voltmeter connected between B+ and time delay terminal 2 should now read zero volts.
Tools required
- DC voltmeter Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- about five minutes
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.