You can unplug that relay and bring it to the parts store to match up to another one. But I'm guessing if that isn't your problem, then the motor shorted out somewhat. Most times, more often than not, I can remove a wiper motor or starter, take them apart and clean them and they are good to go. Most of them just get dirty inside and need cleaning. Or the armature clogs up. So I hope yours is just a relay, easy and mostly cheaper than the alternative.