A quick reference can be found at the website of Sjap.
http://www.sjap.nl/cb-list_737NG.doc
Due to the fact that every carrier have little difference to the standard configuration, or even differences within his hole fleet, the best way to get a correct list is to ask the maintenance.
The AMM (Aircraft Maintenance Manual) Part II contains a "Airplane Circuit Breaker List" which can be found in the introduction (Item 14).