I recently purchased a garmin 440s GPS and I am not sure where the best place is to wire the power to. I looked at some of the threads for mounting tranducers and just hacking into existing wiring, but I didnt have any luck getting it to work. I wired it into the purple and black wires from the fuel guage but my unit did not power up. i may have blown the fuse or that guage may only work if the engine is running, but I dont want to hack into any more wires without more research. Any help on this would be great. I have all the infor I need on mounting the transducer, I just need to get power to my GPS. I am new at wiring so be gentle with your terminology, as I may not get it thanks.