Here is a project to study on: http://www.bluefeat hertech.com/ kc7gr/thevan. html I do not care for the light bar myself, seems like it would bring the officers to you sooner, but the rest is interesting work... Some very good tips on 12 volt wiring and vehicle installs for those new at that. 73 de Bob, K4ESA EM74qc Bob Mantell k4esa at yahoo.com