Cummins/Onan — PT/CT Module - Remove and Replace
Repair & overhaul
From a Cummins/Onan service manual — check it applies to your exact model before use.
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Procedure
- Disconnect batteries
- Remove rear control cover as necessary
- Remove and replace PT/CT module
- Reconnect batteries
- Connect laptop to control, start InPower service tool, calibrate control as necessary
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
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.