Heater Control Panel
WARNING: This page is about a different car, the 1994 Mazda MX-6. However, it is still accessible from the selected car via links, so may be relevant.
Remove heater control panel. See HEATER CONTROL PANEL under REMOVAL & INSTALLATION. Measure voltage at indicated terminals on back of heater control panel. See HEATER CONTROL PANEL TEST table. If voltage is not as specified, check related components and wiring harness. If components and wiring harness are okay, replace heater control panel.
HEATER CONTROL PANEL TEST
| Test Condition | Wire Color | Volts | ||
|---|---|---|---|---|
| 6-Pin Connector | ||||
| Blower Switch Setting | ||||
| Medium-High | Yellow/Black (Resistor) | 0 | ||
| Medium-High or High | Blue/White (Blower Motror Resistor) | 0 | ||
| Medium-Low | Blue (Resistor) | 0 | ||
| High Setting | Blue/Black (ECU) | 0 | ||
| Low Setting | Blue/Yellow (A/C Amplifier Resistor) | 0 | ||
| Any Position | Black (Ground) | 0 | ||
| 10-Pin Connector | ||||
| Any Position | Green/White (Air MIx Actuator) | About 5 | ||
| Any Position | Brown (Air Mix Actuator) | 0 | ||
| Temperature Lever | ||||
| Moved From Hot To Cold | Pink (Air Mix Actuator) | 0 | ||
| In Hot Setting | Green (Air Mix Actuator) | 5 | ||
| In Cold Setting | Green (Air MIx Actuator) | 0 | ||
| Moved From Cold To Hot | Green/Yellow (Air MIx Actuator) | 0 | ||
| Vent Button Pressed | Yellow/Black (Airflow Mode Actuator) | Battery | ||
| Defrost Button Pressed | Yellow/Green (Airflow Mode Actuator) | Battery | ||
| Any Position | Black (Ground) | 0 | ||
| Ignit6ion On | Blue (Ignition Switch) | Battery | ||
| 14-Pin Connector | ||||
| Defrost Button Pressed | White (Airflow Mode Actuator) | 0 | ||
| Vent Button Pressed | White/Black (Airflow Mode Actuator) | About 10 | ||
| Light Switch On | Orange (Tail No. Side Relay) | Battery | ||
| Blower Switch Off | Red (A/C Amplifier) | Battery | ||
| A/C Sw. & Blower Sw. On | Blue/White (A/C Amplifier) | 0 | ||
| Fresh Air Button Pressed | Green/Blue (Fresh/Recirc. Air Actuator | Battery | ||
| Recirculated Air Button Pressed | Blue (Fresh/Recirc. Air Actuator) | Battery | ||
| Defrost Button Pressed | Yellow/White (Airflow Mode Actuator) | 0 | ||
| Heat/Defrost Button Presssed | Yellow (Airflow Mode Actuator) | 0 | ||
| Heat Button Pressed | White/Blue Airflow Mode Actuator) | 0 | ||
| Vent Button Pressed | White/Yellow (Airflow Mode Actuator) | 0 | ||
| Bi-Level Button Pressed | White/Green (Airflow Mode Actuator) | 0 | ||
| Ignition On | Black/Red (Swing Louver) | Battery | ||
| Swing Louver On | Black/Red (Swing Louver) | About 1 | ||