Any tips on changing the nav light bulbs on a 1990 38? looks like i have to remove some interior trim to access them?

On mine use unscrew the light itself, from the deck.

I should have mentioned i have the ones on the port side/starboard side. The cat eye style. Tried to unscrew them from the outside, but screws just turn. I am guessing there is a nut on the inside??

I have the same boat. Go inside v-berth and remove forward panel that is @ the head of the v-berth. Once your in the bow then you can pop out the lights from the fixture. PS - Check for power - may be a bad connection.

Wear long sleeves fiberglass is a *****

remove the Mirror and you are in! also while you are in there make sure your bow cleat does not leak if so unscrew it and reseal

Awesome! Mine had a loose connection or dirty, would come on if I karate chopped it.....

My 90 lightning did the same thing! had a light amount of corrosion on it I soldered a wire to the bulb housing and grounded to to the harness direct . before i did that it kept happening even after I cleaned it !