J92 - Check For Shorts to Power

- Key "ON", engine "OFF".

- Breakout box installed, Powertrain Control Module (PCM) disconnected.

- Connect a test lamp between test pin 8 and test pin 40.

- Observe test lamp for an indication of a fault while performing the following: (The lamp will turn on when a fault is detected, indicating a short to power. Also, if possible, listen for fuel pump turning on.)

- Shake, wiggle, bend the fuel pump monitor circuit and power-to-pump circuit, especially where they may be in the vicinity of a power circuit.

- Lightly tap the fuel pump relay (to simulate road shock).

- Is fault indicated?

Yes -- Isolate fault and service as necessary. Remove breakout box. Reconnect PCM. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)

No -- For dual Heated Oxygen Sensor (HO2S) applications: Go to J96. J96 - Check Left/Front HO2S Circuit For Short to Power

All others: For further diagnosis using an EEC-IV monitor box or Scan Tool, go to Normal Scan Data Values. If an EEC-IV monitor box or Scan Tool is not available, go to J99. J99 - Road Test