hello frits

in alot of these accelerator controls they have a pot, and a start switch and a high speed switch. In some cases if there is only one switch it would be a start/init switch or a high speed switch depending on how it is configured to turn on when the pedal is pressed, either at the beginning of the stroke as a start switch or at the end of the stroke at full pedal as a high speed switch.

I do have one question though, did the old accelerator assy have a part number on it? If so does it match the part you got as a replacement? Is the replacement part OEM or aftermarket (TVH)??

As for that PCB with the burned resistor your either going to have to find another truck like that one and see what it is on that truck (if its not burned). Or replace the module assy complete. The mfg will not give you specs on components because they probably do not know exactly, they usually farm out components from other companies that make them for them. And even if you could i doubt the engineers would tell you.

i would double check that accelerator assy and make sure it is the correct one. And also replace that PCB.