Iirc the trans. Harness is separated at the plug on the fire will, the harnress that the motor is on and then there is one that goes to the tranny

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well that's what I am finding out. . the newer ones appear to be two piece. anyone know where to find one? I can find the manual transmission one, but not the one for the automatic.

 

That's not giving a reason why you still have a no start. What codes are present? What's the rail pressure. While it may be harness related I'm just curious as to what's not working power train wise

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They are a 2 piece but ive had a good buddy run into a similar situation with his 03

 

ok thanks. I assume that it wont' start unless it senses it's out of gear. which means without the harness it can't tell. either way we need the correct wiring.

 

So it's not even cranking?

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i see your point there. it is in fact cranking.

 

Then the neutral safety can't be the cause. A scan tool is what you need. Anything else is guessing.

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ok got a better scanner today. these are the codes. 0514, battery temp sensor performance/rationality, 0107 MAP sensor low, 0336 crankshaft position sensor performance, 2509 ECM/PCM power input signal intermittent, 0335 crankshaft position sensor circuit, 0073 ambient temperature sensor high. I am thinking the MAP and the ECM are causing the problems. we have tried a different crankshaft sensor with the same results.

 

Give me a little while and I'll post some diagrams. In my opinion you need to start with the ecm powers and grounds. Also need to do a basic visual inspection of the sensors. Are they plugged in and making good connection? I'm committed to the belief that the only way to diagnose
a hall effect sensor is with a scope.
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