Chevrolet Repair: 95 Corsica headlight / signal light problem, signal unit, signal work

Question
Headlight, signal, and marker lights are all DIM on the passenger side.
Right signal on dash is on. Signal will not work.

Condition goes away in the HEAT of the day. Headlight and signal work fine.

Cool in the afternoon, the lights are Dim again and signal does not work.?

All bulbs are in fine condition. I have spares and changed them all.

I know some electrical components are sensative to heat and cold.

The only thing left I can think of is the signal unit under the dash ?

Any help would be appreciated

Euge
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Answer
What mechanical work or ANY kind of work has been performed on the vehicle recently ?. As most problems that occur after a recent repair was made can be traced back to the area of where the repair was made as an electrical  may have been knocked loose. Look around in the area where work was performed.

Also checl all you black geounds on the engine and near the headlight assembly to be sure thay are TIGHT.