How to splice cables for my fish finder

Question edited for clarity.

Make sure you got the correct transducer Your model comes in single frequency and dual frequency. Make sure the connection on the back of the unit is good and you have no corroded or missing pins. Make sure the software is up to date.

Lowrance LMS-525C DF Fish Finder Parts

Product Description: Designed for salt water or downrigger tracking, this dual-frequency sonar/GPS chartplotter
provides additional 50 kHz readings, in addition to a high-res 480 x 480 display on a 5" screen
and many professional features.

* Dual-frequency 50/200 kHz
* Precision 12-parallel channel external GPS+WAAS receiver
* Lowrance radar compatible
* LowranceNET® networking (NMEA 2000® certification pending)
* High-speed ethernet connection links multiple Lowrance display units and modules to
operate independently on shared network data, including sonar
200 khz transducer PDRT-WBL Part #106-89
Shoot-thru-hull mount, 20 degree pod type with remote temperature (200 kHz). (20 ft cable) Dual Frequency Transducer HP-DFBL260 Part #106-82
Thru-hull-mount, dual frequency bronze housing, high-power multiple element (50 kHz 19 degree
& 200 kHz 6 degree).

HST-DFSBL Part #106-77
Transom-mount, dual frequency skimmer with built-in temperature sensor. (25 feet of cable)

https://www.google.com/search?q=lowrance+lms-525c+df+software+update

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To connect your Lowrance Hook 7 fish finder to your Minn Kota trolling motor with Universal Sonar 2, you will need the MKR-US2-10 adapter cable. This cable is specifically designed for connecting Lowrance and other fish finders to Minn Kota motors with Universal Sonar 2 technology

Trolling speed TOO slow for units transducer to sense.

Just type this into your browser's searchbox. manualslib.com/manual/292954/Lowrance-Elite-5-Dsi.html
You should be able to pull up the manual there.I just did. Garcuda

Try this,, http://www.lowrance.com/Root/Lowrance-Documents/US/ELITE-5-7_HDI_OM_EN_988-10647-001_w.pdf

try doing what they call a soft reboot on your unit sets all your settings back to factory settings

http://www.lowrance.com/upload/Lowrance/Documents/Manuals/X65.pdf

Hello LJones0455. From your detailed attempts there are few options. Position the transducers one foward one aft. Connect the negitives of the battiers to the boat still route both positive & negitive wiring to all devices. Check the continunity of your transducers include flexing while ohming. Let me know of the results.

I don't think your old fish finder is the LMS-332C GPS Receiver listed above in the description. You don't need the speed wheel for the fish finder to function just the transducer and transducer mount. You should mount that on the back of the boat towards the center but not too close to the motor and not too close to the side of the board. Don't let it hand below the level of the boat. That should keep it from getting hit by the trailer or dragging on the bottom. Try to make it as level as possible. The green and white wires may be for the speed wheel but i'd need a model number for clarification. Hope this helps.

False fish readings are commonly caused by electrical interference such as alternator noise, and by air bubbles flowing across transducer.

For starters make sure your fishfinder is on an independent circuit and not on one powered by your ignition switch. In other words, you should be able to turn your fishfinder on, even though the engine is turned off. Ideally the fishfinder should be wired directly to the battery with an in line fuse.

Try running the boat at a speed slightly higher than trolling speed, then kill the engine, as the boat slows down to trolling speed do you still see false echos? If yes then the problem probably lies with how the transducer is mounted, or where it is located on the hull.

If you don't see the false echos when the engine is off, it may be necessary to reroute the transducer cable to keep it away from the boat's ignition wires. You can get transducer extension cables if necessary. Also there are filters that you can buy that suppress alternator noise buy attaching between the battery and the engine.

Another common cause of false echos from electrical interference is a transducer cable that has been cut and spliced.

I hope this information helps. Please reply if you have any questions about my response.