My guess is a turn signal flasher, I think it is part # 552 or #323. It is the diameter of a quarter and about 1" long. usually silver in color. Locate it when it makes the noise to confirm it. If it is buy a new one, usually a few bucks. If that is the problem... Flasher? Nope! This'll be a speedometer or a speedometer cable! If the noise is present when the car is motionless, my theory is blown, though. Couldn't it be the heater fan?
If your vehicle has a mechanical speedometer it might be your cable rubbing against its casing
I think it might be a pigeon under your dash as for solving it, i would suggest to take it out.
Bearing in blower motor?
The air conditioners intake it under the passenger side dash all the way in the front. Some times receipts or plastic bags can get sucked up there and cause the noise. -Gary
Open the glove box and let the squirrel out!!
what clicking noise in the dash of 1997 mercury marquis
You most likely have a bad relay under the dash. That is what is ticking when the light flashes.
I have a 97 and the repair book says it's on the right side of the steering column under the dash. Try turning on the flashers and the noise under the dash should lead you to it.
The climate control popping noise in the air heater box under the dash that is causing the vehicle to be unable to switch from heat to air is a stuck valve. This value can be opened manually by removing the lower dash cover and reaching behind the glove box.
could be the water pump. maybe radiator
Check the a/c - heater controller and also check for a vacuum leak.........
The fuse panel on an El Camino of that style is located under the dash, where the driver's left leg would be. There is a square cutout in the under dash panel where it is located. You will have to lean under the dash to see it.