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Home >> Isuzu >> 1997 >> Rodeo LS, 2.6 E >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing - 2.6L >> Fuel System >> Fuel Pump Relay Test
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Fuel Pump Relay Test

  1. Power from charging circuit relay runs through fuse/relay box fuse No. 5 and diode box "A" to energize fuel pump relay. Relay is also energized from diode box "A" through oil pressure switch circuit in case of charging system failure.
  2. When energized, fuel pump relay closes power circuit from main fuse No. 1, through fuse No. 2, through fuel pump relay to fuel pump. See appropriate wiring diagram in WIRING DIAGRAMS article.
  3. To test relay, remove fuel pump relay from fuse/relay box on right fender panel. Using jumper wires, ground terminal No. 4, and apply battery voltage to terminal No. 5. See Figure . There should be continuity between terminals No. 1 and 3 with relay energized. If continuity does not exist, replace relay.
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