B4000 Regular Cab 4WD V6-4.0L OHV (1997)
Main Relay (Computer/Fuel System): Locations
1. Fuel Pump Relay
2. Engine Coolant Temperature Sensor (on Intake Manifold)
3. Powertrain Control Module
4. Mass Air Flow Sensor
5. Throttle Position Sensor
7. PCM Power Relay
8. Idle Air Control Solenoid
11. Intake Air Temperature Sensor
12. A/C Pressure Switch
13. Wide Open Throttle A/C Shutoff Relay
14. EGR Valve
15. Octane Adjust Shorting Bar
