hi there I have been reading your fault which codes relate to motor field are you sure you haven't got a faulty drive motor or cables ?
First, check the power and control fuses. Control fuses are located on the system card if I remember correctly and the power fuses are at the contactors. Before powering back up, check shorts to frame. Under the heatsink that the Q1 and Rec1 (which could also be shorted) are mounted to there is an insulator pad. This will sometimes develop a hole, shorting the above components to the frame of the truck.
Battery at 36.7 volts at last check which was Wednesday. Have not checked fuses in contactor panel yet. Truck was powering up and the fingers had to touch it.
i hate to say this but, is your battery ok?
swoops right probaly blown fuse.
for the code 26 the tm1 and tm2 that were put in, are the leads on the right spots? use the two outside pins on the tm and cut the inside ones off. 26 is open in field circuit 23 is armature.
Well first I would check are the control fuses to see if it blew any of them.
If you haven't tried this, try unplugging the battery and plug it back in.
If memory serves me I believe there is a fuse panel tucked in the contactor panel. It should have 2 or 3 fuses on it. One of those fuses is the power control fuse.