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Bad transducer and power plug - Lowrance Mark-5x

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How to install wiring


Start at the transducer, mount it then pull the transducer wiring forward using a wire snake. At the same time pull forward 14ga wire to attach to your power leads.
on most boats I've done this process takes from 90 minutes to 3 hours.
The transducer and head unit are easy to put on. Getting wire from point A to point B is the time consuming part.
Once you have your wires pulled forward route them to your head unit at your console. Drilling of access holes may be required.

Connect power, plug in the transducer line.
Black to negative at the battery, red to positive, don't forget to put in the in line fuse included in your box.

Good luck.

May 24, 2015 | Lowrance Elite-7 Hdi Sonar/Gps Combo,...

1 Answer

No transducer


Make sure the plug that gives this unit power is secure. Also I think this device has a 2ft branch that goes to the ducer. Make sure that's right too

Apr 10, 2014 | Garmin FishFinder 240 with Transom Mount...

1 Answer

Garmin 4208 Marine Transducer Problem


You either have a faulty head unit, bad connection between the transducer and head unit, or a faulty transducer or transduced cable.

Jul 19, 2013 | Garmin GPS

1 Answer

Engine codes 12 and 32


Code 12 - Memory standby power recently lost - Possible Causes
Battery or power line recently disconnected - This code is normal if the electrical system has been worked on or the battery has recently been disconnected. It will be removed after 15 ignition switch on/off cycles.



Low system voltage, bad battery or battery terminals - If the system recently had a power drop (due to a dead battery or bad alternator), this code will appear. If the battery terminals are bad and the engine was jumped, this code will appear. See the Diagnosing Your Charging System page for more information.


Bad connection or wiring - Check the wiring and connections between the battery, power module, and logic module (or SMEC). Check all fusible links and power connectors to the battery. Clean and regrease any corroded connectors with dielectric grease and repair any shorts.




Code 32 - Logic module did not see a change in air/fuel ratio when EGR circuit was activated - Possible Causes
EGR valve stuck open or closed - If the vehicle fails emmisions, then the valve may be shut. If the enigne runs poorly at low rpm or at idle, the valve may be stuck open. It may be the valve or the transducer valve. Test the transducer valve vacuum output. At idle, the transducer valve vacuum should be mostly bled, and there should be very little, if any vacuum at the output. When the engine is revved, the vacuum should increase. If the transducer is functioning properly, replace the EGR valve.


Bad EGR solenoid or Canister purge/EGR solenoid - The solenoid is located in the right, front fender next to one to three other solenoids. See the Understanding Solenoids page for information about how to test and repair solenoids.


Bad connection or wiring - Check the wiring and connections between the solenoid and the logic module (or SMEC). Clean and regrease any corroded connectors with dielectric grease and repair any shorts.


Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.


Thank you for using FixYa, have a nice day.

Aug 20, 2012 | Oldsmobile Silhouette Cars & Trucks

1 Answer

The plug in to the M68 is crumbling away. now will not power up.


Mine is having the same issue. I wrapped it with electrical tap around the outside to hold the pins inplace temporarily. Anyone know if you can buy just the plug or do you have to buy a whole new transducer?

Oct 10, 2010 | Lowrance M68C SMAP w Single Frequency...

1 Answer

My Matrix X25 used to function correctly but it gives me now erratic depth readings and at times get paralyzed on a 7 or 8 meters reading? The auto test indicates that the sounder is OK I checked the...


My unit, a 365i combo, uses the same transducer, I experienced the exact same problem last week, my unit is still under warranty, I sent the unit for repair and just got confirmation that my transducer went bad. The bad news is that the transducer is back order and has been for many weeks, this is an indication of probably a weak design. I have read similar reports on other forums.

Good luck

Sep 01, 2010 | Humminbird XNT Transducers XNT 9 20 T ...

1 Answer

The plug going into the back of my Eagle 350c got hot and partially melted. It still works now but for how long I don't know. Can I splice a new plug in or do I have to buy a whole new transducer?


Well, if it is still working ok now with the partially melted plug, then the transducer itself sounds like it is fine... Attach a new plug and it should all work the same (just with a nice new plug).

Also make sure your power supply to the Fish Finder is properly fused.

Feb 07, 2010 | Eagle Fishelite 502c Igps Fish Finder...

1 Answer

Sonar does not appear to work - not picking up depths or bottom structure. All other functions look good.


This problem is most likely linked with your transducer.

1. Check your transducer cable and make sure the plug terminals are clean, as well as the plug on the back of the unit.
2. Make sure the transducer cable is plugged in correctly and securely.
3. Make sure the transducer is in the water and mounted according to the directions, parallel to the bottom of the boat
4. Turn the unit on while the boat is in the water, but with the engine OFF.

IF it works when the engine is off, but vanishes when the engine is on, you may be having electrical interference.

IF it works when the engine is running, but vanishes when the boat is moving, it is a turbulence problem. Move the transducer.

IF it does not work at all, try borrowing a new or a "known good" transducer and seeing if it works then. If so, replace the transducer.

Let us know if these work or now.

Oct 15, 2009 | Eagle Fishmark 320 Portable Fishfinder

2 Answers

Lowrance x135 not functioning properly


Had the same issue with another brand. Turned out the transducer cable was picking up noise from other cables (power, trolling mtr. etc). Try moving the transducer cable away from any other cables. I put the cable in a 1/4 " plastic housing up to the point where it was above deck and it stopped all the strange stuff. Not sure about the temp issue??

Mar 29, 2009 | Lowrance X135 Power Pro Sonar Without...

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