I have no power to relay fuel pump

Asked by Aug 11, 2014 at 10:45 PM about the 1995 Isuzu Rodeo 4 Dr S 4WD SUV

Question type: Maintenance & Repair

No power to pump relay

5 Answers

104,255

If you have no power on both sides then you either have a blown circuit or an open one in the main power supply. one side should be hot all the time and the other hot only when the engine is cranking or running, grounds are ECM controlled on this vehicle.

1 of 1 people found this helpful.
30

How can I detect the ecm and correct the problem

3 of 3 people found this helpful.
104,255

Use a digital volt meter, hook up the positive wire to the battery and the ground wire to the fuel pump relay ground wire, turn on key you should get a voltage for a few seconds then it will go away, if you don' t get a voltage reading then there is either a broken wire from the ECM to the relay or the ECM has lost the fuel pump relay driver inside the ECM.

1 of 1 people found this helpful.

What is the ECM

104,255

Engine control module.

Your Answer

Rodeo

Looking for a Used Rodeo in your area?

CarGurus has 209 nationwide Rodeo listings starting at $2,300.

ZIP:

Isuzu Rodeo Experts

  • #1
    tas33
    Reputation
    420
  • #2
    dandyoun
    Reputation
    390
  • #3
    yz250chick
    Reputation
    310
View All

Related Models For Sale

Used Isuzu Trooper
70 listings starting at $2,995
Used Toyota 4Runner
330 Great Deals out of 25,172 listings starting at $1,750
Used Toyota RAV4
725 Great Deals out of 50,273 listings starting at $1,195
Used Honda Passport
63 listings starting at $2,495
Used Nissan Pathfinder
439 Great Deals out of 26,141 listings starting at $2,500
Used Isuzu Amigo
6 listings
Used Jeep Cherokee
389 Great Deals out of 59,393 listings starting at $3,995
Used Toyota Tacoma
661 Great Deals out of 45,565 listings starting at $2,700
Used Jeep Grand Cherokee
942 Great Deals out of 71,812 listings starting at $1,200
Used Honda CR-V
713 Great Deals out of 58,753 listings starting at $999
Used Ford F-150
2,821 Great Deals out of 212,216 listings starting at $1,300

Used Cars For Sale

2002 Isuzu Rodeo For Sale
32 listings starting at $2,950
2001 Isuzu Rodeo For Sale
45 listings starting at $2,300

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.