Engine codes everywhere!!!!!

[Brock]

Codes have been reset multiple times and keep coming back. the face plug one was active all day until I climbed a hill for 10 minutes straight then it went inactive......

Within the last day or so I also had a code coming up for no connection to ecm. that one hasn't been back since I unhooked and reconnected my battery cable when I changed my water pump.

It all strated after I installed my boost and egt guages. I tapped in fir power and ground from a junction right behind where I'm pointing in the next pic. the other guages are powered from there as well..... The only thing out if ordinary was when I was testing the wires to see which was ground and which were power, I had my diode tester grounded and when I touched the yellow wire the cluser went haywire. abs, traction, buzzer and engine light came on but then shut off.



I'm sure there is one more code that's been popping up but I can't remember right now.