Caterpillar — Test Step 17. Check the Resistance through the Harness
Testing & diagnosis · Suspect sensor wiring harness
From a Caterpillar service manual covering: 3500B Engine, PM3516, PM3516 Power Module. Check it applies to your exact model before use.
Applies to: Caterpillar 3500B engine
Procedure
- Disconnect ECM connector J1/P1, ECM connector J2/P2 and the suspect sensor connector.
- Connect pin A to pin C with a wire and measure resistance to supply at ECM P1.
- Connect pin B to pin C with a wire and measure resistance to return line at ECM P1.
- Remove all wire shorts and reconnect all connectors.
Tools required
- Suitable piece of wire Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Resistance should be less than 10 Ohms through the harness
Source: Caterpillar 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.