Thread: TPI Tech gauges

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Hate to revive a necropost as my first post, but i have a situation with a customer truck that has the tpi tech speedo and 4n1 gauge set. the instructions say one thing, but my options that the gauge puts out are completly different. my list goes as follows:
hold button for 2 seconds, hellow pops up, option list follows like this:
Ser Hrs
Ser Dis
Clr Hrs
Clr Dis
PPgN-Hi
in this menu is a list of numbers that are this : 084100P
PPgN-Lo
list of numbers like this: 050000P
INPUT:
list like this: L N H
Done

in each of the PPgN menus, all the numbers and the end letter can be changed, in the input menu the L N R can be changed.

All the gauges work except the speedo, which according to the instructions should have the option SELF H after pushing the button 3 times, but on mine 3 button presses gets you to the Clr Dis option. I have verified vss signal up to the gauge set but no matter what i change, i get nothing in the form of a response from the gauge.

If anyone knows how to set this, or what i am doing wrong, please let me know. I inherited this project from another shop that gave up on it, and this speedo is the only thing keeping it from being done.

Also, TPI-techs phone numbers have all been disconnected and the web page is down so i have no way to contact them.

thanks in advance