KM62 - Check A/C ON Circuit For Short to Power

- Key "OFF".

- A/C relay disconnected.

- Disconnect Powertrain Control Module (PCM). Inspect for damaged or pushed out pins, corrosion, loose wire, etc. Service as necessary.

- Install breakout box, leave PCM disconnected.

- Key "ON", engine "OFF".

- Measure voltage between test pin 54 at the breakout box and chassis ground.

- Is voltage less than 1.0 volt?

Yes -- Go to KM63. KM63 - Check A/C ON Circuit For Short to Ground

No -- Service short to power. Remove breakout box. Reconnect all components. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)