Re: pearson 31-2 ice box
Now is the time to get to know your boat up close and personal. You need to open everything that opens, stick your head in with a flashlight and figure out every thing you see. Find all thru hulls, bilge pumps, sump pumps, etc. Look at every hose and figure out its purpose.
When you have done that, you will know if you have an electric pump on your drain or not. I'm guessing not. Most likely it either drains into the bilge or is connected to a sink drain for overboard discharge. Many have a foot pump. Can't say I've ever heard of anyone having an electric pump to drain the icebox.
After you're done looking all over the boat, go to your electric panel and figure out what every switch is used for.
You've been asking lots of questions about your boat, which is good. Some are strickly Pearson related and should be asked on the Pearson forum. If it's not directly related to Pearsons, you may find answers quicker on other forums like the general discussion forum.