Going from 12/24 to 24 volt

[speck662]

So I am not sure how to change my old 12/24 volt wiring to 24volt. The boat is pre wired with the 12/24 volt and from the trolling motor pedal is a 3 wire plug that then changes to 4. I am not sure if I can just cut the foot pedal wire and hook up the new 24v trolling motor to 2 of the 3 wires? If so which 2? Or do I need to rewire everything? I have been looking and not found any clear answers.
Thanks,
Mike

 

[glenn property of pam]

Re: Going from 12/24 to 24 volt

welcome. The trolling plug has 4 terminals? also how many wires are attached to the batteries and run up to the front of the boat?.

The part where you say that the trolling motor wires change from 3 to 4 wires is hard to understand. A picture of the batteries and the trolling motor plug would help or keep it stupied simple and just tell us what wires go from what posts of the batteries to what type of trolling plug you have. Most 4 wire systems with a 4 wire trolling plug you have to install a plug with a jumper inside the plug.

 

[speck662]

Re: Going from 12/24 to 24 volt

welcome. The trolling plug has 4 terminals? also how many wires are attached to the batteries and run up to the front of the boat?.

The part where you say that the trolling motor wires change from 3 to 4 wires is hard to understand. A picture of the batteries and the trolling motor plug would help or keep it stupied simple and just tell us what wires go from what posts of the batteries to what type of trolling plug you have. Most 4 wire systems with a 4 wire trolling plug you have to install a plug with a jumper inside the plug.

So from the motor pedal there are 3 wires black orange and red. those go to a plug looking thing that i can not get a part. So on the other side of the plug thing there are 4 wires. each set says battery one and battery 2. I will try to get some pictures. I am just not sure because me new trolling motor is 24v and has only a red and black. My but was designed with the 12/24 trolling motor. It is a 95 astro s20dc. thanks for the help

 

[glenn property of pam]

Re: Going from 12/24 to 24 volt

There are 4 wire at the trolling plug boat side and 4 pins on the trolling plug on the motor side?. If that is correct you need to buy another trolling plug (male) to replace the one that you can not get to bits. Its a bad idea to splice the new trolling motor to the old wires as that will leave a 12v+ (spare) wire taped up where it could cause a problem later.

 

[speck662]

Re: Going from 12/24 to 24 volt

Glenn,
I tried to post pictures but for some reason the wont load. So I can buy a plug that will go into the 4 prong outlet? Because the motor I just got did not come with anything. So I can get a new plug for just 24v and plug it in? Thanks

 

[Silvertip]

Re: Going from 12/24 to 24 volt

There are four wires (one pair from each battery) that run to a four pin plug at the bow. A four pin plug will be used on a motor that has a 12/24 selector switch which the current motor one has. You do not need to do anything with that portion of the wiring. Your new motor only has two wires because it is 24 volts only. You need a mating plug that has the 24 volt jumper strap in it. If you remove the one you have on the current motor you may find it has (or had one). If not, all you need is the new plug. You can't separate the current plug because it is called a "twist-Lock". Turn it to the left and pull.

 

[speck662]

Re: Going from 12/24 to 24 volt

so I am having trouble finding a male 4 prong plug that I need. Would I be able to hook the plug I have now to the 24v system? From what I have been reading is that there are 3 plugs from the male side. red orange and black. the red and orange are for 12v or 24v. SO if I splice the wires and figure out which is the 24v I should be fine? But that does leave a 12v out.

 

[glenn property of pam]

Re: Going from 12/24 to 24 volt

so I am having trouble finding a male 4 prong plug that I need. Would I be able to hook the plug I have now to the 24v system? From what I have been reading is that there are 3 plugs from the male side. red orange and black. the red and orange are for 12v or 24v. SO if I splice the wires and figure out which is the 24v I should be fine? But that does leave a 12v out. View attachment 213069View attachment 213070View attachment 213071

ok that's a old school plug so you have 3 options.

option 1- replace both the male and female side of the trolling plug with a 4 wire then put the jumper in between battery 1 negative and battery 2 positive on the male plug. The trolling motor hooks to battery one positive and battery 2 negative. This is a good idea if you plan to sell the boat or convert to a 12v trolling motor later.

option 2- remove all wire for battery 2 then install a 2 prong trolling motor plug. Put the black lead to battery 2 negative then install a jumper at the batteries between battery 1 negative and battery 2 positive. this will give you 24vdc only.

option 3- buy a volt meter and work out which 2 wires on the original trolling motor plug are connected to 24v then delete the 12v wire and butt splice to the trolling motor. It will look like crap but its cheap and will work.

 

[Silvertip]

Re: Going from 12/24 to 24 volt

Why not just do this -- You will not need a new plug or a new receptacle.
1) Do not do anything to the RECEPTACLE in the boat. It is already connected correctly if the wiring looks the same as in the following diagram.
2) Your new trolling motor only has ONE red (+24 volts) and ONE black (-24 volts) wire. Remove the four prong plug from the existing motor by cutting it about 18 inches from where the wires go into the plug.
3) Using the diagram as a guide, connect the +24 volt (red) wire from the new motor to the old plug using an appropriately sized butt splice connector.
4) do the same for the -24 volt wire.
5) Jumper the two remaining wires using a butt splice connector.

WARNING: Make sure you properly identify which battery connects to which receptacle terminal. Then make sure you wire the plug accordingly. Follow the diagram TO THE LETTER and you can go fishing.