Front and rear wiper motors are different: rear one has an extra fuse inside! Yes, sounds weird.
Replacing (or bypassing) is not easy, but doable. Dismantling the thing is a bit destructive.
It (fuse) pops when rear wiper mechanism seizes (common issue, water intrusion, rust) or is blocked (in winter time - arm frozen to the glass).
Other reasons are also valid - wires, plugs, switches, relays, main fuses (fuse boxes) etc.