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Brandon
Dodge Dakota
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8/25/2005
21:44:56
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 Subject: No Power to Fuel Pump. HELP!
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ok, ive been stumped on this one. i was driving my truck one night and it died on me. i couldnt hear the fuel pump kick on when i turned the ignition on and didnt hear anything so i thought it was the pump. like a moron i am i bought a new one and replaced it. problem not fixed. i did a test with a fluke to check relays and fuses and everything was fine. so i checked to see if i had power at the fuel pump conection. no power. so i traced wires to the relays, no breaks and all wires are fine. so i figured my computer was bad. got a used one. problem not fixed again. i poured gas down the air intake, fires right up. Any ideas? ive been without a vehicle for 2 weeks.. getting desprate!!! please help!
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NDTracer
Dodge Dakota
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8/26/2005
10:36:57
| RE: No Power to Fuel Pump. HELP!
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Message:
No help for you but I may be interested in your pump if your selling it. Let me know of your model and tank size. Mine is a 96 V8 with 22 gal tank.
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?
Dodge Dakota
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8/26/2005
11:17:44
| RE: No Power to Fuel Pump. HELP!
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Message:
What year ?
Are you absolutely sure that power thru relays is ok ??
The ASD relay must be activated and power flowing thru it's contacts for the fuel pump..
Does your truck have that " splice " about 8 to 10
inches from the underhood fuse/relay box ?
Are you sure it is OK - better to redo it..
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brandon
Dodge Dakota
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8/26/2005
15:41:07
| RE: No Power to Fuel Pump. HELP!
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Message:
no im not intersested in selling myfuel pump. its always good to have extra parts around. yes im sure all relays and fuses are good. but the splice that your talking about, what exactly is that? i figured the ASD was what was stoping me but i switched every relay i had and nothing helped. im gettin so desprate that im thinking about driving my ford explorer again. my dak is a 97 by the way
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austin
Dodge Dakota
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8/27/2005
18:07:27
| RE: No Power to Fuel Pump. HELP!
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Message:
That's funny. I have the EXACT same problem with my 99 2.5L 4 banger dakota. Just happened 2 days ago. It cranked up one morning like normal and after a few seconds...died. I haven't been able to get it to run since. Just like you when I put the key to on, no fuel pump whirr. I bought a new fuel pump, but found out that wasn't the problem. The relays are all good but it's not getting any ground I think. I sure hope it's not a computer. I've checked all my contacts, all my grounds, all connections, all relays and fuses. No luck. Been poking around for a few days but haven't gotten any further. I'm getting so frustrated. By bypassing the relay, I did get the fuel pump to turn on, and it did, but that was just a test. I'm not going to run it that way since I assume the fuel pump relay and asd relay are there for a reason. Someone PLEASE help us. I also get the NO BUS signal on the odometer. I'm guessing because their is an open circuit somewhere under the hood. Why can't Dodge make things more simple?
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brandon
Dodge Dakota
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8/28/2005
17:36:48
| RE: No Power to Fuel Pump. HELP!
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Message:
If you ever get the answer to the problem let me know asap! i dont wanna take it to the dealership and get screwed. this has already been a 600 dollar fix and its probably just a loose ground that i cant find. good luck with your fix! hope everything goes better than my guess's.
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GraphiteDak
GenIII
8/28/2005
20:30:32
| RE: No Power to Fuel Pump. HELP!
IP: Logged
Message:
Interesting to know what it is.
Funny thing is I tied my security into the control lead that powers that relay.
That way my truck don't start unless you touch a magic buton each time you turn the key on.
Now the relay I tied into said it was for the fuel pump or something.
But on mine it also wont let the starter crank over either. And after a few seconds if you leave the key on without touching the button, it says "NO BUS".
Maybe the wiring is a little different on the single PCM 2003 model to where that relay cuts both the fuel pump AND the starter?
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austin
Dodge Dakota
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8/29/2005
00:14:03
| RE: No Power to Fuel Pump. HELP!
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Message:
I DID IT! I finally fixed this heap! My neighbor got me the schematics for it and with a voltmeter we tested EVERYTHING having to do with starting the vehicle. Mostly testing the continuity from each point to the next. I called a dealer yesterday and asked a service manager about the problem. They were very helpful and said the computer won't send the signal to the asd and fuel pump relays until it has spark or I guess that all circuits are closed leading up to that. After pulling everything apart under the hood and taking off the entire airbox, close to the firewall and on top of the headers there is the crank sensor plug. I disconnected it and sure enough, that was where I found the short. It was getting wierd readings on the voltmeter. Just so everyone knows, I tested everything with the battery connected and the ignition key in the ON position. I plugged the crank sensor back in and I heard my fuel pump whirr, I had my fuel gauge working, and lo and behold, the stupid thing fired right up as if nothing had ever happened. I've been pulling my hair out trying to find out the problem and it was just a stupid electrical short that corrected itself once I pulled and replugged that crank sensor. I hope this helps you. I was praying it wasn't the computer. And it still may be and still might give me problems down the road, but atleast it runs....for now. Good luck with your Dakotas!
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brandon
Dodge Dakota
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9/06/2005
22:03:14
| RE: No Power to Fuel Pump. HELP!
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Message:
well im glad you found your problem. i finally gave up and took it into the stealership and they fixed it for me. they did all the testing i did and then they decided it could be a broken wire in the pdc (power distrabution center). i just call it the fuse box under the hood. but sure enough the wire that runs from the computer to the fuel pump relay was broke befor the relay. so they fixed the break and she fired right up. but the thing that hurts most is that it took them 4 hours to figure it out so that put another hole in my butt. hope nobody goes through what i did. thanks for all the tips tho! im definatlly coming back here everyday to see whats up. AWESOME SITE!!!
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Dave Ralston
Dodge Dakota
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4/20/2017
22:28:31
| RE: No Power to Fuel Pump. HELP!
IP: Logged
Message:
No power to fuel pump I replaced new crank
sensor, new fuses and relays, new ECM, new
fuel pump, and both fuse able links by the fuse
box still no power at fuel pump could it be the
ignition switch
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James2002kota
Dodge Dakota
JOIN HERE
8/27/2018
11:11:09
| RE: No Power to Fuel Pump. HELP!
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Message:
This doesn't make alot of sense to me
if the connection is bad at the cam
sensor not allowing spark, how does it
run when you dump fuel into the
intake? I'm having the same problem by
the way.
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chocopie
Dodge Dakota
JOIN HERE
12/21/2018
04:29:05
| KWJsQLqvtsbLkVCk
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Message:
W3AxXg Major thanks for the post.Really looking forward to read more. Keep writing.
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JTD
Dodge Dakota
JOIN HERE
4/28/2020
04:02:36
| RE: No Power to Fuel Pump. HELP!
IP: Logged
Message:
hello,
i have 1999 dodge dakota 2.5L manual trans. ive
tested the fuel pump relay.On pin 1(85) its
shows 3.52V volts. Pin 2(86) 12.53V. Pin
3(30)12.54V. Pin 4(87A)0.0V. Pin 5(87)0V. This
test i did was with key turned on. I also
changed out relays with new ones. Still the
fuel pump is not turning on.Replaced the fuel
pump as well. I also jumped pin 3(30) and pin
1(85) which i belive would energize the fuel
pump. Still got nothing!! Please any ideas how
to solve this. It will be much appreciated.
Thanks
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Travis Surber
Dodge Dakota
JOIN HERE
1/22/2021
18:17:07
| RE: No Power to Fuel Pump. HELP!
IP: Logged
Message:
SAME ISSUE, SOMETHING TO CHECK FOR YOU!!!
Someone had previously replaced the fuel pump on
mine before I bought it. The wires to the fuel
pump had been cut and spliced back together near
the pump (not sure why, I'm guessing because the
wires didn't have a connector from factory they
just went directly to the pump?). If your wires
have been spliced anywhere, check for corrosion,
or sh*tty connections, such as twisted wires with
electrical tape. I cannot stress this enough,
ELECTRICAL CONNECTIONS ON VEHICLES MUST BE CRIMPED
OR SOLDERED. YOU CANNOT USE WIRE NUTS THEY VIBRATE
OFF, YOU CANNOT TWIST AND TAPE IT COMES APART(in
cars)
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Jason Beard
Dodge Dakota
JOIN HERE
11/02/2024
01:42:09
| RE: No Power to Fuel Pump. HELP!
IP: Logged
Message:
So what do I need to check my truck
is a 2004 Dodge Dakota 3.7 motor
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