I'm hearing a click-clicking sound coming from behind the dashboard
passenger side of the '94 LeSabre soon after start-up and the indicator
light on a selector button on the heat/AC controls that is on goes out. If
"off" selected, that one goes out; if de-fog selected, that one goes out,
etc.; might I have a faulty relay behind underhood fuse panel? How do I
check a relay for proper operation? None are marked on underhood bank of
eight. Thanks for advice.