TM 5-3805-293-23-2
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FUEL TRANSFER PUMP TEST CONTINUED
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Test Step 2. Test Fuel Prime Pump Relay Switch Circuit and Fuel Prime Pump Control Circuit.
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1. Turn the ignition switch to the OFF position.
2. Disconnect harness connector FE-C4 (Figure 13, Item 2) from fuel prime pump relay (Figure 13, Item 1).
3. Turn the ignition switch to the ON position.
4. Using a digital multimeter, measure voltage supply circuit 150-RD for voltage between fuel prime pump relay
harness connector FE-C4 terminal 1 (Figure 13, Item 4) and ground. Voltage should be within 18 - 26 volts.
a. Voltage OK - Proceed to step 5.
b. Voltage NOT OK - Proceed to Test Step 3.
5. Using a digital multimeter, measure voltage supply circuit 150-RD between fuel prime pump relay harness
connector FE-C4 terminal 5 (Figure 13, Item 3) and ground. Voltage should be within 18-26 volts.
a. Voltage OK - Proceed to step 6.
b. Voltage NOT OK - Proceed to Test Step 3.
6. Turn the ignition switch to the OFF position.
7. Connect fuel prime pump relay harness connector FE-C4 (Figure 13, Item 2) to fuel prime pump relay (Figure
13, Item 1).
Figure 13. Fuel Pump Relay Harness Connector.
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