My Great-Grandmother's Singer 66 up and running
 

I am missing the needle clamp so I can't actually use it but I replaced the belt and cleaned it all up and oiled it and she runs! My only concern is, the light dims to almost nothing when the motor is running. Is there anything I can do about this? BTW the bulb in the light fixture still lights! It must be from about 1950.
Let me see if this youtube link works to a little 3 second video of it running.

http://youtu.be/QYsHEkgr4vs

Is it the machine's lamp that dims? If it is then you have something mis-wired. There are some generic wiring diagrams here but I don't remember which thread.
IIRC clamps are available from Sew-Classic.com.
Congrats on getting it running. You're almost ready to sew with it.
Rodney

I didn't change anything with the wiring. Underneath the cabinet is a box with 2 outlets. One is labeled light and the other motor. My husband got under there and plugged them in, I'll go check if he did it right but i doubt he switched them, he was carefully checking which was the right one as he plugged them in.

ETA: yes it's the machine's lamp.

This is what's underneath the cabinet. http://i146.photobucket.com/albums/r...0994767368.jpg

No, if you got those switched the machine would run full out when you plugged it into the wall. More likely it's where the wires go into the machine itself.

Cari

Congratulations! You are doing a beautiful job. I agree, the lighting issue is the wiring. Something is wrong. I had the same thing happening to me with my Pfaff. I looked it over carefully, changed the wiring and voila! It's working fine now.

That wiring block is NOT a Singer design. To use that properly you'll need a separate cord with plug for the motor and light. If the motor and light share the same cord it will not work properly.

Singer factory wiring uses a three wire set up tying the wires together in a specific pattern. If they are still wired together and someone put a plug on the wire then you'll get cross feeding from the system.

Joe

You're right about that Joe but she said the machine has been wired for that block. So it has to be like I said, something wrong at the machine. I know Singers 3 wiring. I had to do the wiring on my 201-2. Light to 1 and 3, controller to 1 and 2, motor to 2 and 3. Maybe this will help her.

Cari

Thanks for all the info! I spoke to the repairman at the shop where my Baby Lock is being repaired and he suggested that there is strain on the motor. He told me to oil the part that comes out to attach the belt and a couple of places inside the little holes on either end of the motor. I did that but it didn't help. I really wanted to do this by myself! My husband knows a bit about motors and wiring and said he is going to look at it. I will give him all your suggestions.