Cummins factory wiring diagram, part number 3666268, for the Signature and ISX on-highway diesel engine series with CM870 electronic control module.
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This is the Cummins factory wiring diagram, part number 3666268, covering the Signature and ISX on-highway diesel engine series equipped with the CM870 electronic control module. This is the engine control system used in Class 8 trucks such as the Peterbilt 379 with Signature Series/ISX and CM870 controller.
Delivered as a digital PDF download.
| Manufacturer | Cummins |
|---|---|
| Engine Series | Signature Series, ISX |
| Electronic Control | CM870 ECM |
| Part Number | 3666268 |
| Typical Applications | Class 8 on-highway trucks |
| Format / Delivery |
The layout was neat and made it convenient to check wiring connections and system details.
The diagram was clearly organized and easy to follow. The wiring information was straightforward to review and reference.
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