Looking for some info for wiring beacon lights onto a 2013 prostar. There are 2 optional switches avaliable and was wondering if anyone knew if there was pre wiring for them either located on the firewall on on the frame/back of cab. Dont feel like forking over to the dealer $98 per hour to do it. salesman told me they tend to over bill on it and he dosent recomend having them do it. (pretty decent on his part) The one time he had the service bay do it, it ended up over $600 so yea dont really want to pay that if i dont have to