Call up KBB.com (Kelly Blue Book) and answer the questions about your particular truck and

location ..

Check the contacts in the power source ... Mine fell apart at the end that plugs into the cigarette

lighter port in my truck --- I gathered up the parts and reassembled it without any tools.. I think

it came apart because it was moved so many times. 

How about going to all the music stores in your area .. then to newspapers to put in an

ad about your idea and asking people to join your in the quest. 

The trick is to get the word out -- are you on Facebook or Twitter ?