No power to fuel pump

1999 ISUZU RODEO
142,000 MILES • 3.2L • V6 • 4WD • AUTOMATIC
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ZACH SMITH
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So i have bought this vehicle for my wife for Christmas. The lady had no idea what was going on with it. I sprayed either into intake and it fires right up. Fuel light was flashing and the gauge was not working. I dropped the tank put a new fuel pump in. Cleaned tank has been sitting since 2012 as far as i know. Looked like tank had over a gallon of transmission fluid and some other stuff in tank. So all cleaned re wired new harness that comes with the pump fallowing directions like it said. Put fresh gas in hooked up. Sending unit works the pump still does not come on. The relay and fuse cuts in for the prime (like 4 seconds) then shuts off and i get power to fuse but i am probing with test light at the fuel pump wires and i have no power. I crank and the immobilizer light is flashing i called a key smith and he said this year does not have one and it should still start. I do not know how true this is i think it has something to do with it. Also i found a spare ECM under the seat which scared me thinking ECM is bad. so i have switched back and forth on both of them seeing if i have power which i still don't. I am at a wall. Any chance you guys might know something i don't? No check engine light. The 4 wheel drive light it shows the 4 tires and axles. I do not know if i am saying the light right but it is flashing with the ABS light also. I am clueless can someone please guide me in the right direction?
Nov 25, 2019 at 11:50 AM
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STRAILER
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Hello,

We must be losing power or you have a fuel pump or PCM relay out. here is the fuel pump wiring diagrams so you can see how the system works with a guides to for power and the relays. I have also included the fuse and relay locations.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

and

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.
Nov 26, 2019 at 6:03 PM
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ZACH SMITH
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What causes this light.? Thank you so much wiring diagram helped a lot.
Nov 26, 2019 at 10:41 PM
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ZACH SMITH
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It's alive after 8 years. Thank you so much.
Nov 26, 2019 at 10:42 PM
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STRAILER
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I can't see the bottom of the video. can I ask which phone you are using?
Nov 27, 2019 at 1:08 PM
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ZACH SMITH
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iPhone.
Nov 27, 2019 at 5:43 PM
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ZACH SMITH
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It is the green 4 wheel drive light. It blinks slow and then will blink fast.
Nov 27, 2019 at 5:45 PM
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STRAILER
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Okay cool.. IPhone 5? or That light blinks when the actuator fails. Please start a new question - this is for a fuel pump problem we keep one problem per thread.

Please post your new question here, you must be logged in:

https://www.2carpros.com/questions/new

Cheers, Ken



Dec 1, 2019 at 12:56 PM