A/C Heater Control Module Connector End View
A/C HEATER CONTROL MODULE - BLACK 29-WAY
| CAV | CIRCUIT | FUNCTION |
| 1 | 18RD/YL | FUSED B(+) |
| 2 | - | - |
| 3 | 20BR/YL | SENSOR GROUND |
| 4 | 22DG/BK | REAR DEFOGGER INDICATOR DRIVER |
| 5 | 22BK/WT | SERIAL COMMUNICATION K2 |
| 6 | - | - |
| 7 | 20WT/PK | BLOWER MOTOR CONTROL |
| 8 | 20BR/DG | COOLANT CIRCULATION PUMP CONTROL |
| 9 | 20BR/VT | LEFT COOLANT CIRCULATION VALVE CONTROL |
| 10 | 20BR/RD | RIGHT COOLANT CIRCULATION VALVE CONTROL |
| 11 | - | - |
| 12 | 16BR | GROUND |
| 13 | 22DG/BL | REAR DEFOGGER SWITCH SENSE |
| 14 | 22RD/WT | A/C PRESSURE SENSOR 5 VOLT SUPPLY |
| 15 | - | - |
| 16 | 18BR/YL | RECIRCULATED AIR SWITCHOVER VALVE CONTROL |
| 17 | 22BK/BL | SCI TRANSMIT |
| 18 | 22YL/VT | SERIAL COMMUNICATION K1 |
| 19 | - | - |
| 20 | 18BL/DG | A/C COMPRESSOR CLUTCH CONTROL |
| 21 | 18PK/RD/BL | FUSED IGNITION SWITCH OUTPUT |
| 22 | 20BK/DG | FUSED IGNITION SWITCH OUTPUT |
| 23 | - | - |
| 24 | 22GY/RD | EVAPORATOR TEMPERATURE SENSOR SIGNAL |
| 25 | 22GY/DG | RIGHT HEATER CORE TEMPERATURE SENSOR SIGNAL |
| 26 | 22GY/PK | LEFT HEATER CORE TEMPERATURE SENSOR SIGNAL |
| 27 | 22BL/RD | A/C PRESSURE SENSOR SIGNAL |
| 28 | - | - |
| 29 | - | - |