Can a 36 volt golf cart run on 3 12 car batteries?

I think they are a deeper cycle battery and are quite a bit larger than a car battery and I remember that there is still six in a golf cart. Ask E-Z Go on their website you have access to a computer.

motor vehicle batteries are no longer designed for consistent power drain... they are designed to start up the engine and that's it - after that the alternator takes over... beneficial under pressure precise you will get 36VDC out of three motor vehicle batteries, yet they does no longer be useful in retaining the charge... you will wish deep cycle batteries (which includes those utilized in trailers, and RVs) in case you have been to apply them for an electric powered motor vehicle like a golfing cart...

By your term of (3) 12v car batteries...

Yes, connected in parallel.