Help!!! Did an oil change and NO CRANK

[Dragbear]

I pulled it into my warm garage did a normal oil change the ran it for a minute then shut it down to check fluids. got it finished went to drive it out and no crank.
Dash is all lit normal
Shift indicator is normal
can't move shifter without foot on brake
fuse box has power
no 12v on engine sensors
no power to starter solenoid with key turned to start
held TCM to engine ground and no crank
checked all connections under fuse box and going to engine.
I can jump starter with screw driver and it cranks ok but no start
I can pull the 40a starter fuse and jump 12v to it and it will crank but no start.

Can't find the neutral safety switch!! it is not on trany.

I gave up and went to bed and the next morning the first thing I did was hit the key and it fired up!!!! I ran it for a week with no issues then the wife need the truck and put it back in the warm garage after and has not started since. No CRANK again!!

 

[Awenta]

It doesn't want to be warm I guess. Sounds like maybe a passlock issue? Any codes?

Iirc your nsbu switch is internal.

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[MACKIN]

Sounds like a faulty ign switch to me

 

[Awenta]

Good place to start. Cheap and easy

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[x MadMAX DIESEL]

Yeah that's the ignition switch forsure. those wires pinch and short just like the tow haul does.

 

[x MadMAX DIESEL]

If that's the only vehicle you can sometimes put the tilt steering in different positions till it finally cranks. I had to do that for about 2 weeks before mine totally quit lol

 

[Dragbear]

It woun't start with remote starter either and that bypasses the key

 

[Dragbear]

I plugged in my V2 to reflashed the PCM and it could only find the TCM.
I had to Manuely tell it what it was and when I told it to read the PCM it came back k with $0101 no data recived

 

[DAVe3283]

Sounds like a wiring problem to the ECM. Look over the harness for any pinches or rubbing. I have also had bad luck when the wire loom fills up with fluid, the computers act funky, or don't work at all.

 

[BLACKMAX1]

Yea there could be a wire chaffing on the fender well, does the gear selector illuminate when it's doing this? Your engine harness connectors on top of the motor could be loose as well and not making enough contact.

 

[x MadMAX DIESEL]

Yea there could be a wire chaffing on the fender well, does the gear selector illuminate when it's doing this? Your engine harness connectors on top of the motor could be loose as well and not making enough contact.

That could be it. They make a funny bend and can rub pretty good

 

[duallydmax06]

Any updates? Sucks when these threads just die

 

[Awenta]

Yeah I know. It would solve so much for so many if they posted answers.

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