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Ford f550 diesel with pto option when 12v is supplied to…

Customer Question
Ford f550...

Ford f550 diesel with pto option when 12v is supplied to circuit 322 it wont rev the engine

Mechanic's Assistant: What kind of computer do you have?

New 1999 protech computer for a 1999 ford f550 with 4r100 boom truck

Mechanic's Assistant: Have you installed any updates recently?

Its supposed to be a plug and play with the latest software

Mechanic's Assistant: Anything else you want the Computer Expert to know before I connect you?

Is there a required drive cycle to enable the pto option and wiil codes prevent the pto option from enabling

Submitted: 10 months ago.Category: Medium and Heavy Trucks
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Answered in 8 hours by:
9/26/2017
Technician: Chris (aka-Moose), Technician replied 10 months ago
Chris (aka-Moose)
Chris (aka-Moose), Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 53,336
Experience: 16 years of experience
Verified

Hello, I'm Chris. Thanks for seeking us for help.

You mentioned can codes prevent PTO, the answer is yes, which codes do you have stored?

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Customer reply replied 10 months ago
I cleared and fixed the code I had still wont work
Customer reply replied 10 months ago
everything is wired properly and checked rechecked ive worked on it 2 months now customer stopped yelling at me now he just laughs when I spesk to him
Technician: Chris (aka-Moose), Technician replied 10 months ago

The looks to be a faulty controller or a faulty PCM. If you have tested the PTO input signal to the PCM and it is receiving it them the PCM is my pick. Here is a file from Ford on the PTO operation. https://www.dropbox.com/s/355fkp0cqz30iym/73PTO.pdf?dl=0

Now that I have posted a partial or complete answer, you will see you can rate me. The deposit you have already paid is not transferred to me until you rate me. I would like to receive nothing less than 5 star excellent ratings. So if we are not there yet, please reply and let me help more. If you're not pleased, let me know because rating bad does not result in a refund, there are better options. Rating now will not close this post nor prevent replying. Thanks Chris

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Customer reply replied 10 months ago
I have a brand new protech computer 800 dollars in there with all the latest software
Technician: Chris (aka-Moose), Technician replied 10 months ago

That leaves the PCM to blame if you verified the PCM is getting the signal at the PCM connector.

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Technician: Chris (aka-Moose), Technician replied 10 months ago

Hello Chris here again,

I am checking in to make sure you got everything you expected from my answer. The option to rate my response or reply is still available. I want to make sure you were pleased with what you paid for.

Thanks Chris

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