Hi,

Let try the following ways:

Error 68 means :

- Safety switch (seat switch or deadman sw,..) wire breakage
=> Let check wire connection to Safety switch (seat switch or deadman sw,..) or check the function of the seat switch or deadman sw,..

If not, let tell me more information :

- Your truck was born on 2004 but what month ? before 08/2004 or after 08/2004
- Your truck is AC technology or DC ?
- You email address ?

Then I will help you more.

Good luck