Originally Posted by
Roll-Monroe-Co
For my frankencommuter I have salvaged an old schwinn (prob. Union) bottle dynamo lightset with head and taillight.
Upon being pressed into service for the first time in 30 years, the taillight lit up brilliantly, but the headlight did not come on.
I have inspected the bulb, and the filament appears to be intact. I also tested with another bulb of the same type (also probably 30 years old, but bulb appears to be intact. Neither did this bulb work.
Should there be a ground wire coming from somewhere and going to somewhere?
What else might be wrong?
Thanks for any help you can provide.
Eric
Edit: I also made sure that the positive lead is not touching the ground contact in the socket.
Do you have a MultiMeter for checking voltage/resistance ,etc ? If not ,Harbor Freight has cheap ones that work well for under $10.
Ive had light bulbs & fuses that appeard to be good that didnt work.
Can you hold the bulb in your fingers,& take the wire that goes to the headlamp and hold it against the thread on the bulb and touch the other contact against bare metal on the frame to see if it lights ?
Good luck, dave