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Black death grr

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Black death grr

Postby choppers » 08 Apr 2019, 11:52

I pulled out my transducer and restuck inside the yak to try and get better soundings. I think over time wear and tear had created a bubble.
Anyways seemed to go ok.
Was planning to launch off Cape Paterson for a quick test. Battery failed to fire the sounder.
Grabbed another battery and this also didn't work.
Some cutting of wires and cursing as im running out of cable trying to find good metal again.

Can I buy replacement power lead for Lowrance chirp models if needed?
Any ideas how to inspect where the wiring becomes rust free? I hope to find good metal again and waterproof heat shrink some more wire on.
Note it's the negative that's taken the worst of it
"Ye old town" Yak captures - gummy (116) salmon (32) flatty (35) yakka (28) silver trev (25) couta (38) plus all the garbage fish

Prowler victims - squid (30cm) Gar (36) Snapper (80 :yahoo: ) kgw (39)
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Re: Black death grr

Postby Fish Grylls » 08 Apr 2019, 13:27

Have you also ruled out the connections at the head unit (WD40 Contact cleaner is great) and the head unit itself. If you have a spare unit you should be able to check (welcome to borrow mine). Also I would be removing the fuse out of the equation, and yes I do not run fuses and most kayakers I know do not either. A process of elimination before going the next step to look at a transducer or wiring issue.
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Re: Black death grr

Postby choppers » 09 Apr 2019, 11:21

Tas, I rarely disconnect the sounder from the leads, all this end looks to be in perfect condition.
Removed the fuse when it all failed and still no go

Head unit functioned fine before I touched the transducer.
Might have to pull it out of the yak and do diagnostic
"Ye old town" Yak captures - gummy (116) salmon (32) flatty (35) yakka (28) silver trev (25) couta (38) plus all the garbage fish

Prowler victims - squid (30cm) Gar (36) Snapper (80 :yahoo: ) kgw (39)
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Re: Black death grr

Postby laneends » 09 Apr 2019, 15:02

One thing to consider, even if you can measure a voltage at plug/head connection, if there is a weak connection causing high resistance as soon as you try to draw amps by turning head on it causes a voltage drop which may cause failure to power up.

Going through a similar diagnostic issue myself. New power cables are about $35

If it wont power up it wont have anything to do with transducer, it should power up in demo mode without transducer attached
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Re: Black death grr

Postby Reeling » 09 Apr 2019, 15:43

laneends wrote:One thing to consider, even if you can measure a voltage at plug/head connection, if there is a weak connection causing high resistance as soon as you try to draw amps by turning head on it causes a voltage drop which may cause failure to power up.

Going through a similar diagnostic issue myself. New power cables are about $35

If it wont power up it wont have anything to do with transducer, it should power up in demo mode without transducer attached


you not still struggling with your freebie are you Keith?
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Re: Black death grr

Postby peatop » 09 Apr 2019, 17:11

laneends wrote:One thing to consider, even if you can measure a voltage at plug/head connection, if there is a weak connection causing high resistance as soon as you try to draw amps by turning head on it causes a voltage drop which may cause failure to power up.

Going through a similar diagnostic issue myself. New power cables are about $35

If it wont power up it wont have anything to do with transducer, it should power up in demo mode without transducer attached


I had a similar issue on my last trip to portland, after testing what i could with just a multimeter i thought that my battery might have died, once i arrived home i was in a better position to run more tests to find i had a broken wire, my sounder would turn on but after a few minutes/seconds it would go low voltage and turn off, it was as Keith said, the broken wire would only allow enough current through to turn it on then it would shut down.

To test you wire use your multimeter in ohms check the positive wire end to end (battery connection to head connection) then the negative they should be of the same or similar resistance, to find the actual fault in the faulty wire can be very difficult, if you have reason to suspect an area of breakage this can narrow your search, if the breakage is not near a connection and is from corrosion it might be worth replacing the wire.

To clean the corrosion from wires you wish to join try the attached method ;)
Cleaning corroded wire.png
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Re: Black death grr

Postby laneends » 09 Apr 2019, 19:28

Reeling wrote:
laneends wrote:One thing to consider, even if you can measure a voltage at plug/head connection, if there is a weak connection causing high resistance as soon as you try to draw amps by turning head on it causes a voltage drop which may cause failure to power up.

Going through a similar diagnostic issue myself. New power cables are about $35

If it wont power up it wont have anything to do with transducer, it should power up in demo mode without transducer attached


you not still struggling with your freebie are you Keith?


yes it fired up briefly, then blank again. Took the head into CH Smith they plugged it in and its fine. They said that lead should be fine given it doesn't need plotter connections. The plug gets voltage across it. I have two power packs with fuse set ups, both of which have been cleaned with new plugs. It doesn't work with either.

Hence It must be the lead or the quick connect plug causing a voltage drop. So next test (when I get round to it) is to remove all plugs and connect wire ends direct to battery terminals. That should determine if I have to replace the lead ($35) or the quick connect.

Didn't help my old multimeter was intermittently playing up to confuse the issue.

Petes suggestion for testing resistance is a good one too. I'll give that a shot too.

Kayak wiring always seems to be more finnicky that it should be
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Re: Black death grr

Postby choppers » 24 May 2019, 20:26

Took the sounder to BCF today.
Failed to fire up using their new power cable and battery.
Unit being sent to Lowrance.
Fingers crossed for a replacement or repair
"Ye old town" Yak captures - gummy (116) salmon (32) flatty (35) yakka (28) silver trev (25) couta (38) plus all the garbage fish

Prowler victims - squid (30cm) Gar (36) Snapper (80 :yahoo: ) kgw (39)
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