-04 wont shut off

First I want to say thank you for adding me, I found some solutions from a post on here that got me to this point, so I am working on 99 e825 that wont run.

I had a dead display so I bypassed the small solenoid next to the main one and my display came on but cannot get -04 off the dash, even when bypassing the switch it still shows the -04, then when I kill all power I get code -51 before the display goes off.

Notes:

  1. I do get 12v to small bypassed solenoid when key is on, so I will replace that solenoid I have jumped.
  2. Green and green/white wire at e-brake switch have ~ 4.5V, and have tried jumping them. Also not sure what yellow wire does.
  3. Someone has jumped #21 yellow wire to pin #2 for some reason.

Any help would be greatly appreciated!!!