rob, Don't know what the capacitance or voltage ratings of those caps might be, the popular talking voltmeter has capacitance ranges that may help. Good continuity testers, not the beep-nobeep kind in meters, but the kind that make a tone whose pitch changes with resistance, can test a cap with capacitance values larger than a microfarad or so as the pitch of the tester will change as the cap charges. If the pitch approaches the open circuit state, usually quiet, and finally goes silent, the cap is taking a charge and probably not leaky.
If the cap is rated above a few microfarads and with a voltage rating over 12 volts or so, put it across a 9 volt battery, wait a few seconds for it to charge, remove the battery and touch the cap's leads together. You should get a spark of some kind indicating the thing took a charge. Tom Fowle
