6420 JD instument panel

[Chavey]

Anyone know what might be the cause of the dash (BIF) not working --like no warning lights, fuel or temp guages or tach and ground speed? Also the display on the right side panel next to the hyd controls quit at the same time. All the fuses are ok and the wires are intact behind the fuse board. I'm thinking that the key switch is not grounding the circuts on line 053 but I don't see where the grounds are located. Or where the connectors are in that main harness. Connection to the key switch seems good as well.
The tractor starts and runs fine otherwise.
Thanks for any help!

 

[rexhellwig]

I would phone the dealer shop manager first thing in the morning. If you have a choice of dealers, pick the one with the fastest talkers. Try to paint the guy into a corner for a maximum diagnostic price quote and hold him to it.

Why?

It's not that these tractors are any worse than their competitors, the real problem is quickly accessing usable information to diagnose the thing. Deere has gone from the penthouse to the outhouse in this area.

I have been digging through diagrams in a hit or miss fashion for thirty minutes and don't know anything more than when I started except that the two wonder gadgets may be powered by the same circuit and who knows where it will run.

 

[Tx Jim]

(quoted from post at 00:22:18 02/14/11)
It's not that these tractors are any worse than their competitors, the real problem is quickly accessing usable information to diagnose the thing. Deere has gone from the penthouse to the outhouse in this area.
.

I agree JD service is no where near as good as it was when I left a dealer in '87. I think it will be very difficult to keep these newer electronic tractors operating 20 or 30 yrs from now unlike the JD New Generation and Generation ll tractors.

 

[buickanddeere]

We may consider blaming the public education system too.
There has always been a tendency by the academics in the education system. To dump "slow" or "unmotivated" students into "shop class". We get some of the "parts changers" who can't trouble shoot or diagnose from here.
The few students that are double talented with brains and the ability to work with tools. They tend to be streamed into purely academic subjects by guidance councillors.
The highschools around here under the direction of the school boards and province. They decided in the 1980's and 1990's when home computers first hit the scene.
They concluded that the world only needed students educated in legal, medical, engineering , accounting and computer science. The shops equipment with welders, torches, metal working, lathes, mills, motor generator sets etc. They were sold for scrap and more desks moved into the rooms.
I toured schools last spring with my boy and it was till disheartening. At least his school is now being torn down and being rebuilt with real shops.
The skilled trade pool is so shallow. The local nuclear plant is paying for new high school shop equipment. And taking senior high school kids into the plant on work terms before they even graduate.

 

[ryan3020]

(reply to post at 15:51:33 02/13/11)

Can u give a little more background as to what exactly happened? Did it just not work one day, did you connect something to the wiring, are you also not able to see any diagnostic codes as well? Their wiring can definatly be confusing. You may be better off to contact a local dealer who has a knowledgeable tech that is able to connect to it with Service Advisor.

ALSO- Im not trying to step on anybodys toes or insult anyone however consider this- When deere came out with this newer gen or tractor (late 80's early 90's) electronics became a large factor in their function, now fastforward 20 yrs worth of new models that all use a different design and more electronics. Now who out there off the top of there head can remember how to troubleshoot and repair over 70 yrs worth of different models of John Deere models without useing some kind of technical publication. Dont blame the dealers!

 

[MightyReek]

(quoted from post at 23:51:33 02/13/11) Anyone know what might be the cause of the dash (BIF) not working --like no warning lights, fuel or temp guages or tach and ground speed? Also the display on the right side panel next to the hyd controls quit at the same time. All the fuses are ok and the wires are intact behind the fuse board. I'm thinking that the key switch is not grounding the circuts on line 053 but I don't see where the grounds are located. Or where the connectors are in that main harness. Connection to the key switch seems good as well.
The tractor starts and runs fine otherwise.
Thanks for any help!

Check all those ground cables that are connected to the battery. BIF ground cable 050 goes there, sometimes a wire might be broken...
In the BIF connector the ground is the position 3R.

The power supply to BIF is made by pins 14L (wire 992 straight from fuse F04_09) and 10L (wire 922 straight from fuse F04_10).

This is for european tractores, witch is the only diagrams I have, I don't know if it's the case or if it's the same.
Hope it helps. Please give feedback.

 

[Ray]

The Ac didn't work on my 6410 when i took delivery a few years ago.The JD tech worked for 3 hours trying to figure it out.He had there new service truck with an uplink diectly to JD.I was talking to the service tech when i noticed a wire that wasn't connected by the AC.I plugged it in an the ac works fine now.

 

[rexhellwig]

I believe it. There was a year or two about that era when tractors that size were shipped like that.

Intentionally.
But I can't remember what the reason was.

 

[Chavey]

Thanks for all your help!
By removing and replacing the ground cable at the battery, the ground connection was restored on line 050, and both panels returned to normal (dash and console were both out ).
Actually the grounds cluster at the battery need proper cleaning, but he owner has returned so I'm off the hook. Apparently he was aware of the trick but neglected to inform me--maybe too excited to escape this minus 25 *C weather!
Also, he forgot to mention how many cows would calve or that the mare would steal the calves and run the cows and me off! She's gone to 'a better place'!
Anyway, it's been an interesting lesson. If this were my tractor, all the connections would be coated with di-electric grease and maintained!

 

[MightyReek]

(quoted from post at 01:51:27 02/21/11)
Thanks for all your help!
By removing and replacing the ground cable at the battery, the ground connection was restored on line 050, and both panels returned to normal (dash and console were both out ).
Actually the grounds cluster at the battery need proper cleaning, but he owner has returned so I'm off the hook. Apparently he was aware of the trick but neglected to inform me--maybe too excited to escape this minus 25 *C weather!
Also, he forgot to mention how many cows would calve or that the mare would steal the calves and run the cows and me off! She's gone to 'a better place'!
Anyway, it's been an interesting lesson. If this were my tractor, all the connections would be coated with di-electric grease and maintained!

Great news

 

[MightyReek]

(quoted from post at 00:35:20 02/15/11) I believe it. There was a year or two about that era when tractors that size were shipped like that.

Intentionally.
But I can't remember what the reason was.

I never knew the reason, but I remember there was a procedure to connect it. We had to run the engine for a while at different speeds to start up the a/c properly...