As soon as you have the pump working again, check the LDS fluid level on the lowest height setting. Overheating of the pump motor can be casued by either over-running doe to lack of LDS int he tank or as said some contamination within the motor itself leading to carbon and oily deposits causing heat build up and a short.
Ensure you follow the BSI / Battery disconnect procedure here before accessing the fuses:
BSI Reset / Battery Disconnect / Reconnect Procedure
To get to the Maxi Fuses, you will need to disconnect the battery / remove it for better access, and remove the engine fuse box - the Maxi Fuse module is shown as 2 below: