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World Champs!!!
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Discussion Starter #1
Well slight as in, truck won't turn over.

Just got my engine in after a full rebuild by myself, everything hooked up, all grounds grounded, power where it goes...

Go to turn it over to prime oil system, and nothing. Have power, just nothing when I hit the key. Can hear the fuel pump running, the dash works as normal, have radio/headlights, etc. All fuses appear good.

And Smarty won't even communicate. So...I'm thinkin' that's a bad sign. Possibly an expensive sign. Anyway to test the ECM? Any other thoughts on where to start chasing this thing down? I'm good to go when I know what the problem is, just never been good at tracing the problem (unless it's obvious like melted pistons:doh:)
 

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TECH SPECIALIST
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pull the cable plugs to the ECM
examine for broken off or bent pins.
happens too easily

magnifier and bright light helps
probably have to pull the ECM out for a good look
 

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pull the cable plugs to the ECM
examine for broken off or bent pins.
happens too easily

magnifier and bright light helps
probably have to pull the ECM out for a good look
:agree2::agree2: Sounds like you have a connection problem. Did you disconnect any thing from around the TIPM?
 

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Discussion Starter #4
Are you talking the two plugs that go into the ECM? I never disconnected them. All I did was disconnect the CAN (hmm....I broke the plastic plug. Dang that might be it. Except all electric stuff works...:confused013:) and the trans obviously.

All wiring was still on the engine when it came out. Then I traced wiring, made sure I had pics of where stuff went, then pulled it.
 

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check your grounds. might want to probe around at the ECM and make sure it's got a good signal to ground.
 

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Discussion Starter #7
Well this cold isn't looking to really let up for another week or so, so tomorrow (the warmest day) I'm getting the Satellite off the jackstands and out from in front of the door, cleaning the empty bay in the garage, and rolling the truck in somehow.

Not sure yet where I'm going to start, but the weekend will be spent in, under, above the engine with a test light and meter. Can't do much electrical chasing in single digit weather, but the garage is heated.

I'll keep it updated, and probably ask some dumb questions, so keep an eye out, here, or be square:hehe:
 

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with a test light
Don't do this. You could cause more problems then what you already have. Use your meter. Using a test light you can short out circuits or your ecm. They put more resistance in a parallel circuit which ups it's amps.
 

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Discussion Starter #9
Ah. Yea, I'm no electrician. Thanks

Moved the truck today (pushed it in front of the garage with my 03), and noticed I have no gear indicator in the dash. Think I'll start with the trans harness...
 

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sounds like the bus is down
short to ground,pinched wire , bad ECM ground
did you do anything else to the truck while the engine was out ?
 

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I think you already know this but go through and check and clean all harnesses and connections... probably something simple.. when that doesn't work then panic
 

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You can take the ECM to Cummins and they can bench test it. Not sure what the cost is though. When I was a diesel mechanic I worked no lot of 5.9s and 8.3s and if there was any question we'd send the ECM down the street and have it bench tested.

That being said it doesn't look like that's your problem. Seems to be some type of communication issue.
 

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I don't think these are cummins ECM's anymore ... I thought they were all chrysler ECM's now ?
does anyone know for sure ?
 

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Discussion Starter #16
bad ECM ground
This popped in my head as well. Everything is grounded in stock locations, except the two on the block have roughly 7 layers of paint. I wouldn't think that would be an issue, but...grounds can be picky bastards. I've jiggled grounds before and they suddenly work.

I also used dielectric grease on all connections. That's something I don't usually do. Again, I wouldn't think that would be an issue.:confused013:

I avoid electronics at all costs. I can swap parts and stuff, but electrical...not so much.

I don't think these are cummins ECM's anymore ... I thought they were all chrysler ECM's now ?
does anyone know for sure ?
Mine says Cummins on it. Can't remember the exact wording, but it says Cummins, then has a couple lines of numbers, one of which is the part #, couple bar codes, etc.
 
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