Trolling motor test

carns

Cadet
Joined
May 27, 2011
Messages
8
I have a typical 24v set up. Motorman or something like that 56 thrust. I'm trying to verify that the 3 prong plug that comes from the 2 batterries is giving the trolling motor 3 plug in juice. How do you test that? It worked just fine but the batterues are shot. I would still expect it to turn while plugged io the on board charger, but it doesnt. Also, does anyone have a wiring diagrams for a 24v trolling motor?
 

Silvertip

Supreme Mariner
Joined
Sep 22, 2003
Messages
28,771
Re: Trolling motor test

There are two wire, three wire and four wire systems. How many wires are there from the batteries to the receptacle? How many wires in the cable between the motor and plug. Does the boat have a panel with a 12/24/Run/Charge switch. Is there a 12/24 switch on the motor? Details, details, details. But if I had to guess, your system looks like this based on your limited description. Red to black = 24 volts. Orange to black = 12 volts.

 

carns

Cadet
Joined
May 27, 2011
Messages
8
Re: Trolling motor test

Wow that's great. The foot pedal has a 12/24 switch on it. Nothing on panel. There are 3 wires from the trolling motor and its a 3 prong plug. I have a 3 bank on board charger that does the two trolling motor batteries and starting battery. The trolling motor batteries are older, 3 years, and nvr worked as good as the previous batteries that were in there for 8 years. Or so it seemed. Am I correct that if my on board charger is showing green on all three batteries then there should be enough juice to see if trolling motor works? Thanks a lot!


QUOTE=Silvertip;4219402]There are two wire, three wire and four wire systems. How many wires are there from the batteries to the receptacle? How many wires in the cable between the motor and plug. Does the boat have a panel with a 12/24/Run/Charge switch. Is there a 12/24 switch on the motor? Details, details, details. But if I had to guess, your system looks like this based on your limited description. Red to black = 24 volts. Orange to black = 12 volts.

[/QUOTE]
 

carns

Cadet
Joined
May 27, 2011
Messages
8
Re: Trolling motor test

So 1 of the two batteries checked out as bad and replace or service per the automatic battery charger I use outside the boat. Would this make trolling engine not get any juice? Is there a 3 pron wiring diagram I could use? Thanks.

Wow that's great. The foot pedal has a 12/24 switch on it. Nothing on panel. There are 3 wires from the trolling motor and its a 3 prong plug. I have a 3 bank on board charger that does the two trolling motor batteries and starting battery. The trolling motor batteries are older, 3 years, and nvr worked as good as the previous batteries that were in there for 8 years. Or so it seemed. Am I correct that if my on board charger is showing green on all three batteries then there should be enough juice to see if trolling motor works? Thanks a lot!


QUOTE=Silvertip;4219402]There are two wire, three wire and four wire systems. How many wires are there from the batteries to the receptacle? How many wires in the cable between the motor and plug. Does the boat have a panel with a 12/24/Run/Charge switch. Is there a 12/24 switch on the motor? Details, details, details. But if I had to guess, your system looks like this based on your limited description. Red to black = 24 volts. Orange to black = 12 volts.

[/QUOTE]
 

Silvertip

Supreme Mariner
Joined
Sep 22, 2003
Messages
28,771
Re: Trolling motor test

Yes -- one bad battery in a 24 volt system will prevent the motor from running just like one bad battery in a flashlight prevents it from working. As for diagrams, how about the one that appears three times in this post. Can't make it any simpler.
 

carns

Cadet
Joined
May 27, 2011
Messages
8
Re: Trolling motor test

Yes, those two diagrams are great. And I have it wired accordingly wit two new batteries and the motor still won't work. ? I'm not sure the 3 prong male recepticle is supplying power to the 3 plug female plug from the motor... The light on the motor isn't lighting up so I don't think it's getting juice at all. Is there a way to test the motor without plugging it into another 3 prong male recepticle? All the fuses look good too....

Yes -- one bad battery in a 24 volt system will prevent the motor from running just like one bad battery in a flashlight prevents it from working. As for diagrams, how about the one that appears three times in this post. Can't make it any simpler.
 

Silvertip

Supreme Mariner
Joined
Sep 22, 2003
Messages
28,771
Re: Trolling motor test

Have you measured voltages at the receptacle. Have you verified that the plug wiring matches the receptacle?
 
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