I almost never blame the card, until every other possibility is exhausted. the fact you have these codes indicates for the -most- -part- that the card is working correctly.
if this truck can run at all under it's own power, then this seems to me, for all the world, like a bad connection, or possibly a bad contacts inside a switch, maybe the brake or directional switch or the Accel pot.
Are you ever able to get this truck to move under it's own power? You mentioned hitting a pot. perhaps you can mail me 'off list' for further tests, i would want to know what the voltages are on all the term board connections, with different switches activated (open and then closed)

BTW i tested the terminal 1 and its 4.39volts now instead of the 1.6 i had before. I'm assuming its the card

what do you think?

THANK YOU! you have been very helpful and I can't tell you how much I appreciate your input.

well the numbers (?specs?)you quote are only partially correct, as I don't know where your meter is getting it's neg., (unlike a car, electric forklifts should have no frame ground) nor do I know where you are checking to get what you call "input voltage".
when I say "card position one" I am referring to the terminal strip on the ev100 logics card (2 rows of wires connected by screws, the rest of the wires are connected in plugs). left and right are arbitrary as this card (and the whole "chopper panel") can be mounted facing different directions, and what is front or back of a forklift can be confusing to some folks.
If you do not see voltage greater than 3.25 vdc when you have the neg lead of your meter in battery neg (right at the battery) and the positive lead at position 6 of the logics card term board, with key switch on and accel pedal in the "at rest" all the way up, no one touching it, you have some problem related to that pot.

Okay their is no seat switch that I can see (could of been wired together). The input voltage is 37volts (red) and the signal coming out is 1.4-1.6 depending on the position of the pot. I'll check the card postion one. Thats on the top left cornor. As for the safety aspect I appreciate your input and I will proceed with caution.

Do those specs sound right?

-08 refers to an accel input to the logics card. the input voltage should be at about 3.5 volts DC at the term board on the card, position 1. so if you are stepping on the Accel pedal, and one of these other connections opens (so the logics card thinks the operator got off the seat or turned off the key switch, [etc...]) you can get this code.
be very careful in the controller area, there can be considerable current stored even when the battery is disconnected.
Just knowing what a code means, without fully understanding the cause and effect can be dangerous. I would STRONGLY suggest you work under the supervision of someone that knows what "static return to off" is...
and get the drive wheels off the ground before you go testing stuff..
my book shows an input to the term board (position 2) that comes from the brake switch and the accel start switch circuit, and says code -04.is related to that circuit.
someone with an EV100 handset could come in and adjust the time delay for the seat switch too, and allow more than micro second open so that hitting a bump does not throw the code so quickly.

E357-0466-8985FB

What do the codes mean though? -08?

Thanks for the input I'll check for lose wires around the brake switch and accl pot.

Their is no accl switch just a pot

a little more information would be a good thing to get more correct information back, like a serial number... maybe the type of controller.
I am going to ASSUME this truck haas an EV100 lx controller.
these are all what we refer to as; "static return to off" codes, and they indicate an improper start up, or that the operator presence was not correctly detected.
Look for wires loose on the brakes and or seat switches. even just a little loose can throw these types of errors.
to put a load on the battery you only need to stall the hydraulics (lift all the way up) and read the voltages be sure to read the voltage "at rest" first.
these are not usually battery related codes.