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John Deere Tractors Discussion Forum
Show Parts for Model:

Re: radio on 3020

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grnwrnchr

06-18-2013 07:55:51
97.119.16.248



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Connect it directly to the right side battery, positive to positive and negative to negative, that's the easiest. If you just have the positive wire from the radio, and if your fuse wire on the left battery is good, you can hook it to the positive post on the right battery.




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gary in neb.

06-18-2013 07:58:14
24.116.17.253



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 Re: radio on 3020 in reply to grnwrnchr, 06-18-2013 07:55:51  
i'm grounded to the fender right now and hooking direct to left bat blows radio fuse, so i need to run hot and ground off battery right?



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grnwrnchr

06-18-2013 08:07:19
97.119.16.248



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 Re: radio on 3020 in reply to gary in neb., 06-18-2013 07:58:14  
Do you have a fuse wire on the left battery that goes from the positive post to the transmission case ? If you do, and it's working, (it's working if your oil light and fuel gauge are working ), then you can run the positive wire from the radio to the positive post on the RIGHT battery.



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gary in neb.

06-18-2013 08:09:28
63.224.174.34



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 Re: radio on 3020 in reply to grnwrnchr, 06-18-2013 08:07:19  
do not have that, and fuel gauge and oil light dont work. BUT there is a fuse holder and wire laying on the side of the case. wonder if that is what it's for!!!



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grnwrnchr

06-18-2013 08:15:33
97.119.16.248



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 Re: radio on 3020 in reply to gary in neb., 06-18-2013 08:09:28  
The fuse wire on the left battery is only 12 volt ground on a 24 volt system and is needed to ground the oil light and fuel gauge. Also without that fuse wire, your lights won't last very long, once 24 volts hits the bulbs.



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grnwrnchr

06-18-2013 08:21:33
97.119.21.204



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 Re: radio on 3020 in reply to grnwrnchr, 06-18-2013 08:15:33  
That fuse wire uses a 20 amp slow blow fuse, a regular 20 amp fuse won't last long. If you try to connect that fuse to the battery and it blows right away, you more than likely have a starter problem, even though your starter may seem to be working fine. 24 volt systems work fine when they're working, you might want to think about converting it to 12 volt. If all you really need is the radio, I'd hook it directly to the left battery.

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grnwrnchr

06-18-2013 08:23:02
97.119.21.204



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 Re: radio on 3020 in reply to grnwrnchr, 06-18-2013 08:21:33  
On my last reply, hook it directly to the RIGHT battery.



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D-

06-18-2013 15:46:17
166.205.68.17



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 Re: radio on 3020 in reply to grnwrnchr, 06-18-2013 08:23:02  
What Deere had for a 24V system was a little confusing and unlike other 24V systems. It was actually two 12V systems. One positive ground battery (LH) one negative ground battery (RH). It was a positive ground system. The little fused wire was to split the systems. Some lights worked off one battery while others worked off the other balancing the batteries. That fusable wire was originally just a plain small guage wire called a fusable link. Was designed to burn in two when a short occurred. They finally decided a fuse would be easier to replace.
Since the radio is negative ground you use the RH battery like grn wrncher says.
Maybe this was more info than you wanted? The long way around the barn.

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Tx Jim

06-18-2013 17:37:14
69.35.160.125



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 Re: radio on 3020 in reply to D-, 06-18-2013 15:46:17  
D-

You being a new member probably missed reading the previous heated discussions where it was stated that JD's 24 V system is not two 12 V systems combined with "No ground" required for head lamps. You need to read the archives of this forum. John T I think I hear your phone ringing!!!!!! :wink:



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D-

06-18-2013 20:12:18
166.205.68.43



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 Re: radio on 3020 in reply to Tx Jim, 06-18-2013 17:37:14  
Who won that heated discussion?
You have an ignition switch with a positive post and a negative post, a light switch with a positive and a negative post.
Now do you believe the lights are 24V bulbs. No they are 12V. The inner ones run off of one battery while the outer ones are off the other battery. The same way with the 12V idiot lights. As stated above the oil light and fuel guage won't work without the ground wire connected. The head lights don't work properly either. If the generator was a true 24V generator it would need only two posts. It has three since it charges two separate 12V systems. A true 24V starter would have only one post just as a 6V or a 12V starter. A true 24V system would require resistors to operate 12V lights. There are none except the one on the light switch for dimming one set of headlights.
I guess I won't be calling John T. Maybe that ringing is only in your ears :)

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Tx Jim

06-19-2013 04:19:11
69.35.163.57



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 Re: radio on 3020 in reply to D-, 06-18-2013 20:12:18  
D-

WHOA!!!!!!!! John T or I need no explanation of JD's 24 volt systems. I spent too many years in a JD dealers service dept explaining to technicians about the 24 V systems. Just research the archives for some interesting reading and you will understand my previous statement.
FYI the statement I made about John T's phone ringing was intended as sort of a joke to him.



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D-

06-19-2013 15:05:48
166.205.68.35



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 Re: radio on 3020 in reply to Tx Jim, 06-19-2013 04:19:11  
So did I.
Also I knew you were joking with the comment... so was I.



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