Cummins/Onan — Membrane Switch Test
Testing & diagnosis · Membrane switches
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan OTPC
Procedure
- Remove the connector from J25 on the Digital Module circuit board.
- Press the switch down and measure the resistance between the switch common (pin 10) and each switch at the solder points on the connector.
- The resistance of a closed membrane switch should be in the range of 0 to 200 ohms depending on how hard you press.
- Attach the connector to J25.
- Close and lock the enclosure door.
Tools required
- Ohmmeter Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Closed membrane switch resistance: 0 to 200 ohms
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.