Ok, what the hell is this light?

786824

{"text":"Right below and inside my reefer status panel there is a bright white light pointing right at the cab. Any one know what it's supposed to be? This trailer and last they have been coming on randomly.  ","videos":"[]","link":"{}","pics":"[]","canComment":true,"externalShare":false}

682141

{"replyTo":"","text":"it's the keep going light. you're stopping too much.","replyToPid":0}

720742

{"replyTo":"","text":"I'm gonna guess either defrost cycle, or maybe when engine is running during a cycle sentry mode.","replyToPid":0}