just had an incident when I hit the down switch for frt window, went down with no issue, pulled button back to raise window and nothing, switch seem to break off on the inside, took everything apart, nothing wrong. assembled unit, installed back in truck, worked once then nothing again. cant seem to find out whats causing this switch to work in down position but not up. new unit is only 100.00 but I like to tinker with things, anyone have a thought?