Control Relay
This multi-purpose relay switches power to vehicle sensors and actuators including airflow sensor, crank angle sensor, idle speed control, injectors and fuel pump, (not all sensors are used on all engines). When ignition switch is turned "ON" position, ECU energizes coils controlling injectors, airflow sensor and idle speed control. When ignition switch is turned to "START" position, ECU energizes coils (through inhibitor switch on automatic transmission) to supply power to fuel pump. Relay failure will cause a no-start condition. For additional testing see SYSTEM & COMPONENT TESTING article.
FUEL PUMP TEST TERMINAL LOCATION
| Application | Wire Color | Location | ||
|---|---|---|---|---|
| Colt | Black/White | Center of firewall. | ||
| Colt Vista | (1) | Right of center on firewall. | ||
| Colt Wagon | Red | Left rear eng. compt. | ||
| Conquest | Black/White | Right front of eng. compt. | ||
| Raider | Black/White | Behind right kick panel. | ||
|
||||
FUEL PRESSURE SPECIFICATIONS
| Application | psi (kg/cm2 ) | |
|---|---|---|
| Regulator Hose On | ||
| All Engines | 38 (2.7) | |
| Conquest | 35-38 (2.5-2.7) | |
| Regulator Hose Off | ||
| All Other Models | 47-50 (3.3-3.5) | |
| Raider (3.0L) | 47-53 (3.3-3.5) | |