Joel I worked for the power company for 40 years. Make sure there isn't any step down transformers in the garage. The last thing you want to do is backfeed one and kill yourself. I don't know how it is up there but for us once a service was removed the building had to be inspected and brought up to code.
Mike
Same here in So Cal.
Once we disconnect the service line. There must be an inspection to energize again.
You might try calling the electric company and try to see if they have a record of the service voltage that was last used on the account.
Is the meter still there? Sometimes it is and it will have a serial number in it that will help when you call into the electric company
