Diesel Engines
- Ensure fuse is okay. Check for loose connections in engine compartment or at instrument cluster. Secure where necessary. Remove instrument cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION.
- Measure resistance between pin No. 3 (Black wire) of Black instrument cluster harness connector and ground. Repair Black wire if resistance is greater than one ohm. See Fig 1.
Courtesy of FORD MOTOR CO.
- Measure resistance between pin No. 9 (White/Pink wire) of Black harness connector and negative terminal of ignition coil. Repair White/Pink wire if resistance is greater than one ohm.
- For models without A/T, go to step 5). For models with A/T, measure resistance between pin No. 9 (White/Pink wire) of Black cluster connector and pin No. 36 (White/Pink wire) of Powertrain Control Module (PCM), located on left side of firewall. Repair White/Pink wire if resistance is greater than one ohm. If resistance is as specified, go to step 6).
- For models without A/T, measure resistance between pin No. 9 (White/Pink wire) of Black cluster connector and Tan/Yellow wire of engine speed sensor, located at top left of front of engine. Repair White/Pink or Tan/Yellow wire if resistance is greater than one ohm. If resistance is as specified, go to next step.
- On all models, connect battery. Turn ignition on. Check for battery voltage at pin No. 13 (Red/Yellow wire) of Black connector. If battery voltage does not exist, repair Red/Yellow wire from fuse panel. Turn ignition off. Disconnect battery.
- If indications are as specified, check for loose or missing cluster connection clips. Reseat or replace missing clips. Check for damaged printed circuit. Replace printed circuit as necessary. If connection clips and printed circuit are okay, replace tachometer.