Clicking noise when decelerating

I have the dash out of my 93.5 idi and there is an apparent clicking sound I didn't hear before I had it torn apart. It only seems to occur when I am not on the pedal and when the vehicle is in gear. From everything I've read it's more than likely a relay but I'm not sure where to start. If anyone could point me towards a wiring diagram it would be appreciated. Like I said I have the dash torn apart so everything should be accessible.