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Oil Pressure Sender Test

  1. Turn ignition off. Disconnect oil pressure sensor/switch connector. Connect 2 Red wires from Gauge Tester (J 33431) to terminals "A" (Tan/Black wire) and "B" (Black/White wire). Turn ignition on. Set tester resistance dials to zero ohms, then to 90 ohms. If tester displays zero psi at zero ohms, then 80 psi at 90 ohms, check oil pressure sensor/switch connector for good terminal contact. If terminal contact is okay, replace oil pressure sensor/switch.
  2. If tester does not display zero psi at zero ohms, then 80 psi at 90 ohms, check Tan/Black and Black/White wires for an open circuit or resistance. Check all connectors for good terminal contact. If all circuits are okay, replace instrument cluster.
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