What do you call the electric control unit for wipers located under hood?

There isn't one single universally used name for the electric control unit for wipers located under the hood. It's often referred to as part of a larger assembly, and the specific name might vary by manufacturer. Terms you might encounter include:

* Wiper motor control module: This is a common and descriptive term.

* Body control module (BCM): The wiper control might be integrated into a larger BCM that controls other body functions. In this case, the wiper control is just a part of the BCM, not a separate unit.

* Powertrain control module (PCM) or Engine control module (ECM): In some older or simpler systems, basic wiper functions might be controlled by these modules, though this is less common in modern vehicles.

* Wiper switch assembly (though this includes the switch itself, not just the control unit): This is usually located inside the cabin, not under the hood.

To find the precise name for a specific vehicle, you'd need to consult its repair manual or parts diagrams.