These terminals are minute and do not use high currents so the normal contacts need not be very tight and are spring loaded.
Unless they have been damaged, there is no necessity to tighten them. A paper clip, not the large type, is a good tester, use one end to push into the terminals and if resistance is felt, the contact should be good.
If there are no signs of contamination, there should be no problem with the contacts.
So far, what have you test for the problem?
Do you have the diagnostic procedures?
Sunday, November 1st, 2009 AT 6:59 AM