Air Conditioning Amplifier

a. Remove the multi display with connectors still connected.
b. Inspect wire harness side connector from the back side, as shown in the chart below.

Test conditions:
- Running engine at idle speed A/C switch ON
- Temperature control dial "MAX COOL" position
- Blower speed control switch at "HI" position
- Set on manifold gauge set
If the circuit is not as specified, inspect the circuits connected to other parts.