1997 Chevy S-10 Signal Lights com on but don't blink.

My signal lights on the exterior of my truck will light up when I click the device to turn the signal lights on and the green arrows in the interior of the cab on the dashboard come on but they stay a solid green they don't flash or have that "click click" sound they normaly do, also the signal lights on the exterior stay solid the only way to make them flash is to keep clicking the device manualy it's a real pain in the kester!
What is it? A fuse that's gone bad or some eletrical problem? I can't afford a macanic they cost like $80 an hour around where I live. Is this something that I can try to fix on my own?

Thanks
Sarah