Heater Control Panel
WARNING: This page is about a different car, the 1996 Mazda MX-6, 1996 Mazda 626, 1995 Mazda MX-6, and 1995 Mazda 626. 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 (6-Pin Connector) | Wire Color (Circuit/Component) | Volts |
|---|---|---|
| Blower Switch In Medium-High Setting | Yellow/Black Or Green/Red (Blower Motor Resistor) | 0 |
| Blower Switch In Medium-High Or High Setting | Blue/White (Blower Motor Resistor) | 0 |
| Blower Switch In Medium-Low Setting | Blue (Blower Motor Resistor) | 0 |
| Blower Switch In High Setting | Blue/Black (ECU) | 0 |
| Blower Switch In Low Setting | Blue/Yellow (A/C Amplifier, Blower Motor Resistor) | 0 |
| Any Position | Black (Ground) | 0 |
| Test Condition (10-Pin Connector) | Wire Color (Circuit/Component) | Volts |
| Any Position | Green/White (Air-Mix Actuator) | About 6 |
| Any Position | Brown (Air-Mix Actuator) | 0 |
| Temperature Lever Moved From Hot To Cold | Pink (Air-Mix Actuator) | Battery |
| Temperature Lever In Hot Setting | Green (Air-Mix Actuator) | 5 |
| Temperature Lever In Cold Setting | Green (Air-Mix Actuator) | About 1 |
| Temperature Lever Moved From Cold To Hot | Green/Yellow (Air-Mix Actuator) | Battery |
| Vent Button Pressed | Yellow/Black (Airflow Mode Actuator) | Battery |
| Defrost Button Pressed | Yellow/Green (Airflow Mode Actuator) | Battery |
| Any Position | Black (Ground) | 0 |
| Ignition On | Blue (Ignition Switch) | Battery |
| Test Condition (14-Pin Connector) | Wire Color (Circuit/Component) | Volts |
| Defrost Button Pressed | White (Airflow Mode Actuator) | 0 |
| Vent Button Pressed | White/Black (Airflow Mode Actuator) | About 10 |
| Light Switch On | Orange (TNS Relay) | Battery |
| Blower Switch Off | Red (A/C Amplifier) | Battery |
| A/C Switch & Blower Switch On | Blue/White (A/C Amplifier) | 0 |
| Fresh Air Button Pressed | Green/Blue (Fresh/Recirculated Air Actuator) | Battery |
| Recirculated Air Button Pressed | Blue (Fresh/Recirculated Air Actuator) | Battery |
| Defrost Button Pressed | Yellow/White (Airflow Mode Actuator) | 0 |
| Heat/Defrost Button Pressed | 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 |