Lowrance won’t power up

[Christo]

Hi everyone,
My Lowrance unit won’t power up, I’ve changed fuses, can’t see any loose wires, my batteries have close to 13volts so it should have enough juice. I’m out of ideas what could be wrong with it, at my wits end with this thing. Manual is about useless for troubleshooting, and can’t seem to find anything online either:/ It’s an LMS-332c unit, probably about 15 yrs old. Anyone have any other ideas what could be wrong with it? Here’s a pic of it when it was working.

 

[techmitch]

Does the unit have good power and ground feeds? If so, to the dumpster it goes, unless of course there is an internal fuse.

 

[Christo]

I think so, I was looking for any kind of inline fuse also and couldn’t find one, I’m stumped. You may be right Mitch, may have to upgrade the damn thing, lol.

 

[techmitch]

I think so, I was looking for any kind of inline fuse also and couldn’t find one, I’m stumped. You may be right Mitch, may have to upgrade the damn thing, lol.

Were you looking for an inline fuse because you have no power to the unit?

 

[Christo]

Yes, all of a sudden last week it just wouldn’t turn on.

 

[techmitch]

Have you actually tested the power and ground wires at the unit itself?

 

[Christo]

No I haven’t, didn’t have a voltmeter with me.

 

[techmitch]

Get one of these or better and keep it in your boat tool box. With any boat, it won't be the last time you need it.

https://www.harborfreight.com/11-fu...-continuity-61593.html?_br_psugg_q=multimeter

https://www.homedepot.com/p/Power-Gear-500-Volt-Digital-Multimeter-50953/203735809

 

[Christo]

I will do that! Thanks for the advice

 

[Wanderer 290]

It is easy to open the case and ck the power switch for corrosion.