TC Mod and protecting the PCM - Ford Powerstroke Diesel Forum
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Old 04-05-2009, 03:43 PM
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TC Mod and protecting the PCM

Hi all,

I just put together a TC Lockup box from Guzzles web site. Welcome to guzzle's TC Lockup Mod Web Page . I just have a quick question. I have been reading on some forums that it is bad to allow voltage to go back to the PCM to fake it out into thinking it still has control of the TC so you don't get the OD light. This mod has you put a resistor inline with the voltage going back to the PCM to look like the solenoid actuating on the TC. Just making sure before I go installing it. Thanks

Brian
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Old 04-05-2009, 04:58 PM
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Just finished mine this afternoon and it tested out great! I almost can't wait to drive 27 miles to work tomorrow morning!
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Old 04-05-2009, 05:00 PM
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Cool, just wanted to make sure im not going to have magic smoke come out of my PCM with this particular mod write up. Thanks

Brian
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Old 04-05-2009, 05:29 PM
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Here are pics of my completed box. Just need to install. Just curios any one else that has made this particular box, what is the output voltage that you are getting that will go to the pcm when in manual. Thanks


Just a relay and a few resistors


Here is the back side, dont judge me on the solder job.


And the box all closed up
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Old 04-05-2009, 10:11 PM
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I run and have run the DI lockup switch for over 5 years. It doesn't have a diode or resistor or anything in the system.
http://67.19.132.3/dieselinnovations...s/tclockup.pdf

I have no doubt you will not hurt anything as long as you did it right.
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Old 04-17-2009, 11:27 PM
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Well i got it installed tonight and it seems to work so far. I havent had it above 35 yet, but I am going on a short trip tomorrow and cant wait to try it out more. Thanks for all the help.
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