Turn signal relay keeps clicking on and off

that vehicle has a desperate relay for the hazards which is why they work, you have a defective signal flasher sometimes called a signal relay, follow the noise to locate exactly where the part is, usually under driver side of dash, it is a very cheap part and easy to install.

Yes, most likely the hazard switch is the culprit. It should have a built-in relay.

that is because they run off different systems, they both have thier own relays, normally the common fault with flashers not working is either, fuse, or relay (flasher repeter unit), if you turn your turn signals left or right can you hear a click click click noise? if not its your flasher unit, hope this helps

bad relay or a bad wire

The turn signal/wiper control arm may have gone bad. Auto Zone has them cheaper then the Dealer or you can go to the Salvage yard and pick one up for around $35.00 to $50.00, just call around to see which is the best price. Some will even be as low as $10.00 if you remove it your self from a truck and there is also a 90 day warranty.
The neat thing is that you can take one apart from a Salvage yard and find out what not to break from your truck when working on it. If you feel that it is the signal relay, your going to have to drop the panel under the drivers side to get to the relay on the driver side behind the cigarette lighter.
Good luck and hope this helps.

TRUE DAVE FROM THE SOUNDS OF THIS IT'S PROBLY A BAD RELAY THATS STUCK OPEN OR CLOSED

Unplug the turn signal relay from the fuse box and start you engine. Does it still make that noise?
If yes... Put the relay back in, that is not the problem.
If No...Then the relay could be bad, replace it!

PLEASE RATE THIS SOLUTION! Thank You Very Much!

The Turn signal relay on a 94 s10 blazer is located under the cluster area right behind the panel that holds the parking brake release handle you will see it once a couple of trim panels get remove it will be to the right side of the brake release handle

did you have the head gasket replaced or the intake gasket replaced. it's important that i know exactly what they did to your engine. i will be able to pin point the exact problem

It could be your fuel pressure regulator, check this link for details:

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c1528022b9c4

That's what it looks like.