04 s 10 with plow

Hi there, my friend recently had his snow plow pump stolen off the front of his truck while it was parked in his driveway. Well he asked me if there would be anyway to prevent this from happening again. He already has a viper alarm installed. Is there a way he can use one of the input triggers or something else? I know this might seem like a weird question,   but given the fact how much a new pump is and a high deductible, he doesn't want it to happen again. thanks

what would like to do? i really cant think of any sensors you can use other than a microwave sensor. you can probably pick up a 508d for around $20 on ebay