The fuel pump on my 1998 Regal LS2500 is not switching on when I crank the engine. Under normal conditions when I turn the ignition switch to "ON" the fuel pump would cycle for a couple of seconds then stop. Continuing to turn the ignition from "ON" to the "START" position would normally cause the pump to continue to cycle until the engine started. Now, the pump does not run for the brief interval when first turning the ignition key to "ON" position nor does the pump run when the key is in the "START" position. The starter motor does run, and all switches and gauges at the helm respond as normal. Here is a diagram of the fuel pump wiring and relay I made up from looking at my boat:
If I connect a jumper wire across terminal 30 (Power from Battery - Red/White conductor) to terminal 87 (power to pump - Yellow/Green conductor) the pump runs fine.
Using a voltmeter I checked the voltage at terminal 86 (power from ignition switch?) while cranking the starter motor and saw that there was no reading on the meter.
So I figure my problem lies with the ignition circuity. But I do not know where to begin tracing this back from the pump relay. So where does that small gauge green/white wire leading to relay terminal 86 come from? Does it feed from the J1 or J2 connectors coming out of the ECM or should I be looking somewhere else? Any ideas? Does any one know of a wiring diagram for the 5.7GSI PBYCCE? That would help me trace down the problem.
If I connect a jumper wire across terminal 30 (Power from Battery - Red/White conductor) to terminal 87 (power to pump - Yellow/Green conductor) the pump runs fine.
Using a voltmeter I checked the voltage at terminal 86 (power from ignition switch?) while cranking the starter motor and saw that there was no reading on the meter.
So I figure my problem lies with the ignition circuity. But I do not know where to begin tracing this back from the pump relay. So where does that small gauge green/white wire leading to relay terminal 86 come from? Does it feed from the J1 or J2 connectors coming out of the ECM or should I be looking somewhere else? Any ideas? Does any one know of a wiring diagram for the 5.7GSI PBYCCE? That would help me trace down the problem.