Cummins/Onan — Control Reactor Testing - Method F (Ohmmeter)
Testing & diagnosis
From a Cummins/Onan service manual covering: 02SX1N1A, 04SX1N, 04SX1N1A, 04SX1N1B, 04SX1N2B, 04SX1N3B, 04SX1N4B, 06SX1N, 06SX1N1A, 06SX1N1B, 06SX1N2B, 06SX1N3B…. Check it applies to your exact model before use.
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Procedure
- Isolate control reactor by disconnecting common lead C from its point of connection.
- Carefully measure resistance from lead C to numbered lead on control reactor.
- Good if resistance within 10 percent of value specified in Table 1.
- Defective if no resistance indicated between common lead C and numbered lead (open circuit).
Tools required
- ohmmeter Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- resistance within 10 percent of Table 1 value
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.