Dandydan
Seaman Apprentice
- Joined
- Jul 27, 2018
- Messages
- 34
Today I started trying to sort out why my Lowrance fish finder has so much interference that it cannot read the water depth. The GPS and charts seem to work fine. I have suspected a faulty ground and went to work finding the problem staring with the power hook up and ground circuit for the device. Well it is a mess in there behind the dash. One of the things I found was a ground buss that had come unstuck from its place on the dash. I determined it was a ground buss by the black wires coming to it and the fact that my test light lit up when connected to biggest black wire and touching the probe to a known hot wire. Here is where it gets interesting. There are 5 or 6 other black wires that were connected together on this buss bar that was just floating around behind the dash. Locating where it was supposed to be, I disconnected all the “ground wires” and reattached the buss where it should be. While waiting for the adhesive to set up I started checking othe wires with the test light. Hooked up to the same ground, the biggest black wire, when I touched the other wires that came off the buss, the test light glowed dimly. What in the world is going on?