730 D electric start electrical problems

[jdman2009]

It’s a 730 D electric start with flat top fenders. Trying to get the 4 fender lights and dash lights to work but I don’t have any power. I’ve read numerous posts on this. Does anyone have a picture or diagram of how the 2 batteries should be hooked for it to work? I’ve seen some with 4 batteries but I only have two. Kinda new on one of these 24 volt systems. I’d like to be sure there hooked up correctly first. I do have 24 volts but also have 24 on the light switch also and don’t have any power on my fender lights.

 

[Tx Jim]

Do you have a ground wire with inline fuse attached between the two 12 volt batteries to battery box or rockshaft housing? This ground attached to either + or - post will supply ground connection for field lights & fuel gauge.

 

[jdman2009]

I’ll go look in a few minutes but the fuel gauge seems to turn on when I turn the light switch on about 2nd click. I got it this way and am just trying to get the rest working or straightened out.

 

[Tx Jim]

Notice wires(item 18) which is the accessory ground wire I referred to.

 

[rrlund]

Notice wires(item 18) which is the accessory ground wire I referred to.

Yep, that's the main thing right there. Mine quit working one time and all that was wrong was that wire was broken.

 

[JIM MN]

You only want 12 volts at the light switch, not 24 volts? Your fender lights are 12 volts. You may have burned out the four fender lights with your 24 volts at the light switch. If you are running a 24 volt generator to charge your batterys, your system is 24 volts, positive ground. For your lights you need to take off 12 volts from one of your 12 volt battery negative post to your light switch and a wire from the positive post to ground. That will give you 12 volts to your lights?

 

[buickanddeere]

Half the lights are 12V positive ground and half the light are 12V negative ground .
There is a 12V pos and a 12V neg terminal on the light switch .

 

[jdman2009]

Notice wires(item 18) which is the accessory ground wire I referred to.

I don’t see any wire anywhere. Could it have been put somewhere else? All I see is whoever ran 2 cables up to the starter then came off it is what it looks like but there is 24 on the switch and nothing light wise anywhere else or on any other terminal on the switch

 

[jdman2009]

You only want 12 volts at the light switch, not 24 volts? Your fender lights are 12 volts. You may have burned out the four fender lights with your 24 volts at the light switch. If you are running a 24 volt generator to charge your batterys, your system is 24 volts, positive ground. For your lights you need to take off 12 volts from one of your 12 volt battery negative post to your light switch and a wire from the positive post to ground. That will give you 12 volts to your lights?

You only want 12 volts at the light switch, not 24 volts? Your fender lights are 12 volts. You may have burned out the four fender lights with your 24 volts at the light switch. If you are running a 24 volt generator to charge your batterys, your system is 24 volts, positive ground. For your lights you need to take off 12 volts from one of your 12 volt battery negative post to your light switch and a wire from the positive post to ground. That will give you 12 volts to your lights?

So run a wire from hot post to ground. Will the battery box be ok or need to put it somewhere else? Then run another to the power on the switch from negative post off of same battery or from other battery negative?the unhook what they have run to it.

Sorry for all the questions first time with one of these 24v I had a 720D but I converted it from a pony and made it just 12v

 

[Scott 730]

I would suggest getting access to a wiring diagram, and studying it. The center ground is missing for sure, but there could be other issues beyond that.

 

[wore out]

So run a wire from hot post to ground. Will the battery box be ok or need to put it somewhere else? Then run another to the power on the switch from negative post off of same battery or from other battery negative?the unhook what they have run to it.

Sorry for all the questions first time with one of these 24v I had a 720D but I converted it from a pony and made it just 12v

The heavy "jumper wire" between the two batteries needs to be connected to the chassis with a 20 Amp slo-blo fuse in the wire, or with a length of 16 or 18 GA fusible link wire.

It doesn't matter at which end/battery post of the heavy jumper you accomplish this.

"A" on the combination switch is fed (-) 12 Volts and "B" is fed (+) 12 Volts.

 

[buickanddeere]

You only want 12 volts at the light switch, not 24 volts? Your fender lights are 12 volts. You may have burned out the four fender lights with your 24 volts at the light switch. If you are running a 24 volt generator to charge your batterys, your system is 24 volts, positive ground. For your lights you need to take off 12 volts from one of your 12 volt battery negative post to your light switch and a wire from the positive post to ground. That will give you 12 volts to your lights?

No no no . The system IS NOT 24V positive ground .

 

[buickanddeere]

So run a wire from hot post to ground. Will the battery box be ok or need to put it somewhere else? Then run another to the power on the switch from negative post off of same battery or from other battery negative?the unhook what they have run to it.

Sorry for all the questions first time with one of these 24v I had a 720D but I converted it from a pony and made it just 12v

What hot post to chassis ? The bond to chassis is connected to the mid point between the batteries . It should fused at 20 amp .
The light switch is supplied with both 12V positive and 12V neg .

 

[jdman2009]

Notice wires(item 18) which is the accessory ground wire I referred to.

Notice wires(item 18) which is the accessory ground wire I referred to.

Are both battery cables supposed to be hooked to the starter? One goes to the solenoid and one two the end of the starter which is supposed to be ground. It starts fine but I think that’s why I’ve got 24v to the switch. I could be wrong but can’t find a diagram or picture to see if that’s wright

 

[rrlund]

How do these things always go so far off the rails. Turn on the light switch, touch a bare wire on either battery post where the cable goes between the two, then touch the other end of the wire to someplace where it'll ground. See if the lights come on. There's no sense even talking about anything else until you do that.

 

[jdman2009]

How do these things always go so far off the rails. Turn on the light switch, touch a bare wire on either battery post where the cable goes between the two, then touch the other end of the wire to someplace where it'll ground. See if the lights come on. There's no sense even talking about anything else until you do that.

That’s what it is. When I tried that the light wires have 12v and it made the 24v I had on the power wires on the switch go to 12v now. Everything seems to work right soon as I replace some of the lights and make a permanent ground wire. Thanks for the help

 

[buickanddeere]

Are both battery cables supposed to be hooked to the starter? One goes to the solenoid and one two the end of the starter which is supposed to be ground. It starts fine but I think that’s why I’ve got 24v to the switch. I could be wrong but can’t find a diagram or picture to see if that’s wright

End of the starter is not ground. The end of the starter is direct to a winding , not to chassis .

 

[buickanddeere]

That’s what it is. When I tried that the light wires have 12v and it made the 24v I had on the power wires on the switch go to 12v now. Everything seems to work right soon as I replace some of the lights and make a permanent ground wire. Thanks for the help

Half the lights have to be supplied from one battery and half of the lights from the other battery . Otherwise one battery will go dead and the other with over charge .

 

[AJB-830]

Half the lights have to be supplied from one battery and half of the lights from the other battery . Otherwise one battery will go dead and the other with over charge .

I run two 12 volt batteries on my JD 830 electric start. In your picture you are missing the ground wire that comes off the cable that connects the two 12 volt batteries in series with the other end going to a frame ground. This is the wire that makes the lights work on 12 volts. One light is 12 volt positive and other is 12 volt negative. If you want, I can send a picture of this wire from my 830. This is the wire that "Wore out" mentions in his post. Al

 

[jdman2009]

I run two 12 volt batteries on my JD 830 electric start. In your picture you are missing the ground wire that comes off the cable that connects the two 12 volt batteries in series with the other end going to a frame ground. This is the wire that makes the lights work on 12 volts. One light is 12 volt positive and other is 12 volt negative. If you want, I can send a picture of this wire from my 830. This is the wire that "Wore out" mentions in his post. A

Yeah that would be alright if you could. I just put a make shift to see if that fixed everything but only thing that doesn’t work is the Gen light. The light itself works if you touch it to the dash but put it in and nothing when I turn the switch on.