Caterpillar C15 Wiring Harness Parts | TPI truckpartsinventory›Wiring Harnesses›CaterpillarNeed Caterpillar C15 Wiring Harness Parts? Check out 26 Caterpillar C15 Wiring Harness Parts for sale. CAT C15 wiring harness. engine to cab. in good conditions. 00470ga P92 6687 Call the following number for the part. 1-855-878-2967. 2003 Caterpillar C15 (Stock #100618-21) CAB TO ENGINE HARNESS 70 PIN ECM. 6NZ ENGINE. LOOKS OK ENGINE Caterpillar Wiring Harness: Heavy Equipment Parts & Accs I have 2 Caterpillar wiring harness adapters that were hooked to attachments, but never saw service. This is the 8 pin to 12 pin adapter. This is an auction/sale for 1 adapter.