Left headlight sometime working only if i punch light,99" plymouth breeze 4 cyl?

Yes, they are on separate fuses. You obviously have a connection problem, if you have access to a test light, do this.turn lights on and when there not working undo socket from lens with bulb still attached. If by wiggling the the light came on then most likely in that area. now if the bulb isn't on take out of socket and check for power, if your test light lights up you have a ground problem which shouldn't be too difficult to find, put bulb back in and wiggle the wires down the loom and if they come on while doing that you have a broken wire, make sure lights are off if repairing yourself or a shop will be able to and shouldn,t cost that much.