In craft with electrical systems, electric T&Bs are the norm. They have brushes inside that commonly fail. They can be rebuilt for a fairly reasonable price.
Look for a switch, a fuse or breaker, or, failing all that, a cannon plug on the back of the instrument. If you have a vacuum instrument and no vacuum source, well, I think you've found the problem. ;) John Cooper Skyport Services 4996 Delaware Tnpk Rensselaerville, NY 12147 518 797-3064 www.skyportservices.net ,_._,___
