Fuel system or electrical problem? - '97 Ram 1500
Truck won't start - have fire, but apparently no fuel. Cannot detect fuel pump "whirring" at initial key "on."
I've gone through the fuel system diagnostic procedure described in the Haynes manual, and have found a potential electrical problem. The Fuel System Relay (inside the Power Distribution Center) tests okay with correct resistance and continuity, but the problem was found in the socket that the relay plugs into. With the ignition key "on," the panel terminal that relay terminal 86 plugs into (one of the five "holes" for the relay plug blades) is supposed to register 12 volts, but it registers 0.
The Automatic Shutdown Relay and its panel socket test okay according to spec., and the Fuel Pump Fuse tests okay. I'm not convinced that there's a problem with the fuel pump; I suspect that the anomaly with the Fuel System Relay socket is preventing power from getting to the fuel pump.
- What might cause the absence of voltage on the panel for FSR 86? Would this symptom prevent the fuel pump from operating?
- Could the Automatic Shutdown Relay be involved? What would trigger the automatic shutdown?
- Any other insight or similar experiences with this sort of problem?
This is a '97 Ram 1500 with the 5.2 L engine.
I would greatly appreciate any assistance.