PB3 - Check Spout For Short to B+ (Excluding VREF)

- Key "OFF".

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

- Ignition Control Module (ICM) (Pins 1-6) disconnected.

- Key "ON", engine "OFF".

- Measure voltage between test pin 36 and test pin 40 or 60 at the breakout box.

- Is voltage reading greater than 10.5 volts?

Yes -- Service short circuit. Remove breakout box. Reconnect all components. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)

No -- Go to PB4. PB4 - Check Spout For Short to VREF, Ground, and PIP