Test Point 3 is supposed to be 5VDC....................Not 11.5. Test point 1 should read the same as TP 3. Test point 5 is the input to the 5V regulator circuit and should read 11.5 or thereabouts.
A mod to these driver boards is to tie TP1 and 3 on the wiring side together with a jumper to improve reliability --not relying upon the connector.
What does test point 1 and 5 read on your meter?