'wired' is mostly correct. You need to drain and check it.

But, FIRST, you need to make sure the ground is dry enough: if you drain a pool in wet ground, it can float out of the ground. Concrete pools, like yours, can usually be drained if the ground is not absolutely saturated. Fiberglass and vinyl pools can usually NOT be drained safely. If your pool has a deep end, the risk of draining is greater than if the pool is all shallow.

If you are on a hillside, you can probably drain without worries. But if you are in a low lying area, you may have to have a professional drain it.

If you want to check things out, *most* (not all!) concrete pools can be drained, if a freshly dug 4' deep post hole next to the pool stays dry overnight.