Guests - If You want access to member only forums on HSO. You will gain access only when you Sign-in or Sign-Up on HotSpotOutdoors.

It's easy - LOOK UPPER right menu.

Sign in to follow this  
Followers 0
riverrat56

Depth finder does not work-

12 posts in this topic

I was getting the boat ready yesterday, got the depth finder put back in, and it won't turn on.

It's a cheapy, an Eagle Fish Mark 320, I checked voltage at the plug and there is 12.8v getting to the depth finder. It worked last fall and was stored inside all winter, now it does nothing at all.

Thoughts?

Thanks guys.

Share this post


Link to post
Share on other sites

Corrosion on the connector pins maybe? Try seating and unseating the connector a few times and try wiggling the connector too. Might be a long shot but worth a try and cheap.

Share this post


Link to post
Share on other sites

LMITOUT's idea is a good one to try. Another possibility is working the power button on the 320 in case it's sticking inside the casing.

Share this post


Link to post
Share on other sites

I've had that problem in the past, and I'll tell you what mine was.....I sanded the contacts on the plug, sanded the fuse ends AND the contacts on both ends...still didn't work. Then I took the fuse out, and stretched the spring out a little...walah, that did it. Every contact is suspect....after double-checking all those and the fuse, it could be the switch. The finders I have will not work if the voltage is down too low (10.5 V mostly). Every dirty contact can drop the voltage a little more.

Share this post


Link to post
Share on other sites

soldoncass - those are some excellent points that you made, but in this case he tested the voltage at the plug and is getting 12.8 so that should rule out anything having to do with getting power to the unit.

Share this post


Link to post
Share on other sites

How did you measure voltage at the connector end, and what did you use? 12.8 volts on the power wire, what about the ground side, try using a test light across the power and ground terminals on the connector. If it will light a test light brightly then you have checked the power and ground circuit and ruled out voltage drop as well. A dvom will measure voltage, but doesn't put a load on the circuit as a light does. If the light glows dimmly, you have a voltage drop, or high resistance, at a connection or in a wire. If the light is bright that circuit is alright and its on the depthfinder side of the connection.

Share this post


Link to post
Share on other sites

Capt Don has a good point, most multimeters have a 1MegaOhm resistance across the voltage side terminals.

The other would be to make sure the pins are both present in the back of the finder case, I had one get damaged before, I dont know how but something bent the pin over.

Share this post


Link to post
Share on other sites

Thanks for the help guys, I know there is no problem at all with the voltage getting to the plug, I even bypassed the fuse and fuse holder just to check if that was the problem.

Not really sure if I want to tear into the depthfinder itself yet, but it does sound as if the power switch could be bad?

Share this post


Link to post
Share on other sites

I have the 320 on my boat and you do have to hold it in for about 3 seconds before those units will turn on. I am sure you know this but I just thought I would mention it.

Share this post


Link to post
Share on other sites

You've mentioned the power side of the circuit, be certain to check the ground side of the plug if you haven't already. You can have all the power in the world at the plug but without ground its a no go.

Share this post


Link to post
Share on other sites

With an Eagles 502C I've had problems with the copper sleeves inside the female end of the plug peeling away from one side of the plug. The pin on the depth finder doesn't make good contact and the unit won't power up. When I'd check it with a tester light it would light up because the pointed end on the probe would go in deeper and make contact.

I used a dental pick to carefully bend the sleeve back into the right position and it worked for about a year. It's conected to a Minnkota with US so I got a new link when it happened a second time. Now I'm carefull when I plug it in to make sure everything lines up just right.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0



  • Posts

    • I looked everywhere for the screws in the first post and nobody knew what I was talking about till I went to Ace, where I should have gone first. They are actually considered a sheetrock screw! I can't see any use for them with sheetrock but I was told it was because of the coating on them. I have a beat up old trailer house at hunting camp and they are perfect for putting warped metal siding back together and super sharp like a self piercing screw. Sometimes they are called gutter screws too. The hex ones do work great for boots and four wheeler tires.  
    • I liked Lavine too, but coming off ACL surgery you get the feeling that he will lose some of that explosiveness that made him fun to watch.
    • And remember, turkey is not pork and doesn't benefit from high internal temperatures.   It dries out if overcooked.  160 is plenty, maybe even a little less. 
    • Also, turkey doesn't need to be "low and slow" to get to be tender. Crank the heat to 250+ if you like. I've had the smaller breasts done in just 2 1/2 to 3 hrs. FWIW, I just rub it down with olive oil and apply your favorite rub.  If injecting at all, Creole Butter is a nice, quick, easy option. Apple mixed with cherry or hickory are my favorite woods to use.    
    • Well, that was interesting! The same trade that would have been good last year is seemingly brilliant this year. Butler immediately shores up our defense and creates additional scoring for this young, suddenly legitimate team. Great move to start the new year, and a good draft prospect at #16 to boot. While I do like Lavine, we seemed to do a bit better with him sidelined which is not an indictment on his talent, but rather proof that he didn't quite fit our scheme. All in all, this was about as lopsided a trade as I can think of and we should be pretty darn happy with the return we got!
    • What a treat to see a tanager.
    • Beautiful pics as always Jim.  
    • woooowww thats really cool ,,, and the pics are great ))) i just imagined fishing under sunset ))) soo nice ,, take me with you to fishing
    • fun to see the scarlets.  been a while since I have had the pleasure. 
  • Our Sponsors