Engine has stalled

Tiny
RIVERMIKERAT
  • MECHANIC
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Incomplete closure of the switch-no ground or power on Pins 85 and 86 when the switch controlling the relay is activated. That can be a bad switch, broken wore, or bad ground. A faulty relay can also fail to close, even if everything else is good.

Take a look at the diagrams below. They are typical 12 volt relays. The bottom 2 images might make it easier to see what happens. Pins 85 and 86 energize a coil. Pin 30 has fused 12 volt power, and Pin 87 has the load attached (in this case the fuel pump).
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Sunday, April 1st, 2012 AT 2:15 AM
Tiny
REEDBONE
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Ok I have check all inline fuses and bad wires I cant find anything I have no pwer to inertia switch and when I ground out pump it runs
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Sunday, April 1st, 2012 AT 2:19 AM
Tiny
REEDBONE
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So should I have power on 30 85 &87 and there should only be one ground right or no cuz I have only two powers and two ground unless one is suppose to have power
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+1
Sunday, April 1st, 2012 AT 2:22 AM
Tiny
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Pin 85 goes to ground. Pin 86 is switching power from the ignition switch. Pin 30 is fused power constant. When Pin 85 goes hot, so does Pin 87.

What size engine do you have? If we know that, we can look up the wiring schematics for it.
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Sunday, April 1st, 2012 AT 8:31 AM
Tiny
REEDBONE
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V6 4.0
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Sunday, April 1st, 2012 AT 11:48 AM
Tiny
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Like that. Thanks Wrenchtech.
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Sunday, April 1st, 2012 AT 7:09 PM
Tiny
REEDBONE
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I have that but I chased all wires none broke or anything could it be the computer not grounding out
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Sunday, April 1st, 2012 AT 7:11 PM
Tiny
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Yes, it could be. IS your fuel gauge working?
When you said:
"i jumped my pump from the eec and grounded it and the pump come on" does this mean you applied power from the EEC and ran a dedicated ground wire and it worked?
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Sunday, April 1st, 2012 AT 7:43 PM
Tiny
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Oh, and what pin of the EEC did you use?
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Sunday, April 1st, 2012 AT 7:43 PM
Tiny
REEDBONE
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Ya I ran a wire to ground on battery and it would run idk it was one on far left
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Sunday, April 1st, 2012 AT 7:45 PM
Tiny
REEDBONE
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No it wasnt wrkin
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Sunday, April 1st, 2012 AT 7:46 PM
Tiny
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Ok. It sounds like we need to figure out why power isn't getting to the pump. Make sure the fuel pump fuse it good. Make sure Pin 86 goes hot with the key on. Make sure Pin 30 is hot full time and that Pin 87 goes hot when the key is on. And then verify continuity in all the wiring.
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Sunday, April 1st, 2012 AT 9:07 PM
Tiny
REEDBONE
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Ok well I only have 2 powers
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Sunday, April 1st, 2012 AT 9:23 PM
Tiny
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With the key on? What Pin #s? If you're testing the relay socket, with the relay out, that's correct-no relay to close, allowing current to flow between Pins 87 and 30.

Remember to check continuity with the power off, or you'll damage the meter.
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Sunday, April 1st, 2012 AT 9:37 PM
Tiny
REEDBONE
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87&85 I have power
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Sunday, April 1st, 2012 AT 9:40 PM
Tiny
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With key on? Ok. Now check for continuity between 86 and ground. If that's good, you have a faulty relay. If not, you have an open wire between Pin 86 and ground.
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Sunday, April 1st, 2012 AT 10:37 PM
Tiny
WRENCHTECH
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I don't see anything attached to ground in that diagram. Trigger ground is provided by the PCM for 2 seconds only.
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Sunday, April 1st, 2012 AT 10:51 PM
Tiny
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Yeah, but it's got to go to ground to complete the circuit properly.
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Sunday, April 1st, 2012 AT 11:08 PM
Tiny
WRENCHTECH
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The PCM does that and only for 2 seconds. I'm sure you're aware of that but I didn't want the poster looking for something that doesn't exist or try to add a ground manually which would be a disaster.
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Sunday, April 1st, 2012 AT 11:11 PM
Tiny
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Yeah. For 2 seconds, until the engine starts, then it's constant ground.

Or, stated better: 2 seconds with key On. To provide enough pressure to start the vehicle. And it provides a constant ground once the engine is started.

It's actually starting to sound like maybe that's what's not happening.
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Sunday, April 1st, 2012 AT 11:28 PM

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