I got this unit with the Ranger I bought used last year. So far it has worked fine until my last outing. First it froze up on me and then when I turned it off and back on, it would read accurately for about a minute and then just go crazy. By crazy I mean the depth would just keep going deeper even though really it was not. We were sitting in about 5ft of water and this thing was reading like 155. When I turned the unit off and back on same thing, worked for a minute and went crazy. It has only happened once and I have not been out since. I plan on seeing if it repeats next time out before replacing. Any ideas as to what could cause this? Battery was okay, connections were good. The transducer is a thru hull type and I really can't even get to it. I can follow the wires to to what I think is the transducer. It looks like maybe two of them. And on top of it, I was looking under the dash to make sure connections looked okay, and there is another cable to the unit tied up under there. The unit has two cables that plug into the back, one is a two prong and the other is like 8 prongs. Which one is power and which is for the transducer? Any suggestions? Could it have just been a gliche or the heat or something? I have some trips comming up and I'd hate to have this thing crap out on me during one.
