Ok. So system card would code you out immediately as soon as you flip the key switch. So now that we know that the code is coming out after the 1st selftest the issue is in either power card or Q1 suppressor system. To determent this is easy. Test 017 ramping test checks the Q1. Also simple is fallowing voltage from the system card to the power card and from the power card to the Q1. What I find weird is different motor gives you code 26. Not 23. So code 26 will come ahead of 23 because 26 kicks run the power card side which is before test in the Q1 circuit. If you tell replace motor and code 23 continue then I would understand. But change motors goes from 23 to 26 somethings not right. Also this code 26 started coming out after your disconnected leads on the motor. I'm hopping you didn't blow the power card and TMs.