"tap into your knowledge" is correct and usable in written English.
It can be used when referring to accessing knowledge that someone already has. For example, "Tap into your knowledge of world history to answer the questions on the test."
Just tap into your personal knowledge base.
After all, there's a good chance you have friends who are keyed in to a particular industry or company, so you can tap into their knowledge for your own investments.
Giants such as Google and IBM have internal, closed developments but people can't tap into their knowledge.
Roy's had experience of major tournaments with Switzerland and England so it would be foolhardy of me not to try to tap into that knowledge.
I want to incite people to tap into the knowledge of a physio and seek advice so they can sustain their sporting or non-sporting ambitions.
I want to believe this kind of observation because I want to tap into a knowledge that transcends and subverts the stultifying logic of measurement and science.
To tap into the knowledge they've got and to get their perspective on things from outside the bubble was a refreshing experience.
MI5, for example, put officers in police stations to tap into local knowledge and began to look for networks, not simply organisations.
The site prompts users to tap into the knowledge that exists in the minds of relatives to answer questions: Who was Mom's prom date?
Acknowledging that due to geographical constraints, the city is not close enough to any large music cluster to tap into the knowledge there, it has turned what could have been a hindrance into a major positive.
They had all learned their craft at journalism schools; Harvard didn't offer anything as mundane as journalism, and the articles I was writing in Rochester didn't tap into my knowledge of the National Liberation Front.
