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  #11  
Old 01-09-2020, 02:40 PM
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with an H&S device, you can put it into recovery mode, and probably repair the original ecm.

Obviously it wont start with the replacement pcm because PATS thinks you are trying to steal the truck.

Only other chance would be to get the pcm bench flashed to your current VIN and then try it.
  #12  
Old 01-09-2020, 02:51 PM
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It only cranks with the brown wire jumped to the battery.

The PCM I got was programmed from Flagship one. Supposedly they claim it’s plug and play. The anti theft still flashes on the old PCM.

Does the H&S have to be married? I think there is a guy around here with a H&S but he has a 6.7.
  #13  
Old 01-09-2020, 03:12 PM
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its not plug and play if all the other 11 modules in the truck are locked out due to PATS. The last one i did i dont think i used a vin locked tuner. you may need an unlock code somewhere along the way though.
  #14  
Old 01-09-2020, 04:41 PM
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Tomorrow I’m going to put the old PCM in and start troubleshooting the no crank issue first. I guess I have to dig deeper into the PATS after I verify the drive selector. If I’m not mistaken, those should be the only two triggers for a no crank scenario.

If those fail, I’ll retest the Data link wires and work from there. Any advice on that? I don’t have the PIN numbers or test procedure
  #15  
Old 01-09-2020, 04:42 PM
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Dont overthink it. PATS is causing your no-crank. period.
  #16  
Old 01-09-2020, 04:46 PM
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Ok, what do I need to chase down?

Edit: now that a think about it, a couple months ago, my key would not start the truck. I had to use the viper to remote start it, and then it randomly started with the key a day or so later.

Last edited by sixmassive; 01-09-2020 at 04:51 PM.
  #17  
Old 01-09-2020, 07:32 PM
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My advice is completely ditch the viper alarm and try again. My mustang had the same problem with the no crank and as soon as I took off the alarm system completely it cranked up fine.
  #18  
Old 01-10-2020, 05:20 AM
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Agreed. Remove the remote start completely, and double check every splice to make sure the wires are good.
  #19  
Old 01-10-2020, 09:59 AM
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I would just snip the wires and not mess with the scotch locks/T taps or whatever they used. That way you won't take the chance of cutting the main wires. I dont have first hand experience with the viper alarms but i have heard on many occasions that they have caused issues like this. One person i know personally had it happen to his Chrysler cebrings( how ever it is spelled) took it off and it fired back up.

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  #20  
Old 01-13-2020, 02:31 PM
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Ok so alarm was removed by a viper installer and the PATS is still active.
Still no comms with PCM
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