The 1-A will only close when unit gets to 80%
Speed it is basically your high speed contact
It is referred to as a bypass contact it is to keep your scr panel from getting overheated
When it pulls in at high speed it bypasses the scr panel and goes from battery to motor it will not close until the card or switch on some units bring it in at 80% speed
If your contacts close but no scr you should check your drive motor cables and drive motor
Drive motor brushes , fuses and #1 rec