ELECTRICAL SYSTEM TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
FUEL INJECTION PUMP CIRCUIT TEST - CONTINUED
Reconnect P20 (WP 0170 00).
Expected Results. All connectors, pins, and sockets are securely connected and/or inserted. Harness and wiring are
free of corrosion, abrasions, and pinch points.
If results are OK, proceed to step 3.
If results are NOT OK, there is problem with wiring or connectors. Replace wiring harness in question
(WP 0169 00 thru WP 0175 00). Verify repair has eliminated problem.
Disconnect fuel pump relay (WP 0054 00).
Measure voltage between test point D on fuel injection pump power relay and engine ground and test point B and
Reconnect fuel pump relay (WP 0054 00).
Expected Results. Measured voltage is between 22 and 27 VDC with no suspected intermittent problems at this
If results are OK, voltage is correct. Proceed to step 4.
If there is intermittent voltage or no voltage, proceed to step 5.
Check supply voltage at fuel pump control.
Disconnect P40 connector from fuel pump control (WP 0164 00).
Measure voltage between P40:7 Pump Supply (+) and engine ground.