JD 4440 Radio Installation

Bill Becker · Mar 5, 2018

Okay, I am no wiring wiz so I need some help with a radio I received for Christmas last year for my JD 4440. On my tractor, I have a red, black and yellow wire which on the radio I have the same colored wires. For the speakers is where I am having issues. On the tractor, there is a green and white wire for the rear right side and a purple and blue wire for the rear left side. On the radio though, it has a 3 prong female end that has a green, purple and green/black wire. How do I hook these up to make the speakers work? Also, on the radio, there are some short wires that are bunched together held by a shrink tube and these wires include a white, white/black, blue and purple/black wire. Do I need to use some of these wires? Sorry for all the questions, but I am confused to how everything get hooked up. Thanks for any help in andvance.

cjunrau · Mar 5, 2018

the plug you are showing I don't think is speaker. the other 4 that are shrinked I believe are speaker wires. The owners manual should tell you what color is what. A google search for that make model radio would also work. White whiteblack is front I think. the blue purple black is rear? Might be other way around. sometimes the wire themselves have a small tag to tell what is what.

Bob · Mar 5, 2018

Somebody must have been in there before and cut the matching connector off of the speaker wires in the SGB that would have plugged right into the connector in your photo.

Unfortunately, I don't have a wiring diagram at hand with the color codes.

Short version is that one prong is a common ground (-) for the LH and RH speakers (likely the center prong), one prong is LH speaker (+)and one prong is RH speaker (+).

Bill Becker · Mar 5, 2018

In the radio book it says the green and green/black wire are for the rear left speaker and the purple and purple/black wire is for the rear right speaker. It also says the white and white/black wire is for the front left speaker and the grey and grey/black wire is for the front right speaker. There are no front speakers except the middle one that is already hooked up to the radio already in the bezel. Does this help? Thanks.

cjunrau · Mar 5, 2018

all radios I've worked on always had front left and right and rear left and right, that takes 4 wires plus 1 for - . 1 to each speaker plus - . now if the radio only has front and back adjustment then it would only need the 3. So you may be correct on that plug.

Bill Becker · Mar 5, 2018

Here is a picture of the tractor wires off the old radio.

cjunrau · Mar 5, 2018

yes
each speaker uses 2 wires.
you do not need to hook them all up.
On your controls on the radio you will find front rear and left right knobs.
some say fade to send noise to the back.
hook the 2 wires to which ever speaker you want to use
green and greenblack
white and whiteblack
etc.
if you want you can hook white and grey together and whiteblack and greyblack together and hook to middle speaker.
that will make the middle speaker always on when you switch to front speakers on radio knob. You won't have left and right but that don't matter anyway as you don't have 4 speakers.
If 2 back speakers 1 gets purple and one gets green.
then if you send to rear or fade you will be able to have left or right on or a mix.
The plug you showed might be your power and ground and the third is constant power for the memory in the radio as i bet it is digital clock and 6 button preset stations.

cjunrau · Mar 5, 2018

on second look that plug is for a different vehicle. just leave it unhooked. I see the fused positive in the pick and the single little blue is probable the always live for the clock and memory. do not hook the memory up- if tractor will sit for 3-4 weeks without being used. sometimes they will drain the battery in cold weather enough so it won't start.

cjunrau · Mar 5, 2018

all makes sense now The new radio has it's own speaker. that plug will be for extra speakers but your tractor will not have that plug. the plug that your tractor has if that is what is in the last pic plugs into a fancier radio. My guess is you will be able to find where someone has added that plug to the original wires going to the speakers. I'm not sure that that tractor even came with rear speakers. Mine didn't and I added them and ran new wires with a plug like your old one.

Bill Becker · Mar 5, 2018

cjunrau - So on the new radio plug, I should just cut off the 3 prong plug end and attach green wire on the new radio to the green wire on the tractor harness for the right rear speaker. Then connect the purple wire on the new radio to the purple wire on the tractor harness for the left rear speaker. What do I do with the other green/black wire on the new radio, just leave it? Also, on the tractor harness for the rear speaker do nothing with the white and blue wires that also run from each of the rear speakers since you said you only need one wire to hook up per speaker?

cjunrau · Mar 5, 2018

does the new radio tell you what the 3 wire plug is for,
green
green black
purple

I'm guessing here
green on plug to green on tractor speaker
purple on plug to purple on tractor
greenblack on plug to white and blue on tractor

each speaker has 2 wires 1 is + and 1 is neg.

if you have an old speaker I would double check the new radio plug to make sure those are actually speaker wires.

Bill Becker · Mar 5, 2018

cjunrau - in the radio book it says green is + and greenblack is - and that is for the rear left speaker. It says purple is + and purpleblack is - for the rear right speaker but in the 3 prong plug, the purpleblack is missing. It is however in the small bunch of wires that are tied together. Should I use the purpleblack and connect it to rear right also for the -. I am sure the could just tie together the 2 negative wires from both speakers and use the greenblack wire for both negatives?

cjunrau · Mar 5, 2018

Yes you can do either one. Tie the 2 negatives together won?t hurt anything. Only thing might happen is bass treble doesn?t always sound right when dun that way. Your surround sound is better if you would take the purple black wire out of the bunch tied together

Bill Becker · Mar 5, 2018

cjunrau - Thank you so much for the information.

ss55 · Mar 8, 2018

Crutchfield is pretty good at providing mounting kits and wiring harnesses for most installations of their stereos. They might consider a JD4440 an interesting challenge.

www.crutchfield.com/m_422650/Specialty-Vehicles.html

JD 4440 Radio Installation

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