My turn signals don't work, light light but no flash. I was told I needed a relay but can not find the relay.

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What is the year make and model?

1990 Honda EX 5 speed

Accord, Civic, CRX or Prelude?
The relay/flasher is likely in the underdash fuse block.
Do the four-way hazard flashers work or not?

Honda civic the hazard flashers only light do not flash.
I think it is under the dash but could not locate it. I thought it would be with the fuses but I can't see it maybe I don't know what I am looking for thanks

Turn Signal/Hazard Relay: Under LH Side Of Instrument Panel, At Front Of Fuse Box

Try looking and listening while gently switching the turn switch: the relay will click each time the turn switch is closed.

I hope this helps.