Lindsay,
Yes, on my 57 light swtich there is a very small fuse. I am trying to find out where the last dash gray light bulb goes.
Bill, I am looking at the back of the ignition switch and I do not see where that bulb would plug in. I did not see a location on th light switch as well. Ok I will check the rotary rheostat as well. it is amazing just to see the turn signals working again after 30 years.