Hi, I've got a '72 JD 820 and bought the recommended replacement switch #al19890. Does anybody have a diagram for hooking this switch up? I can't figure out which wire goes where. It didn't come with any directions. Any help would be appreciated! Thanks
JD 820 switch
- Thread starter Mtbassman
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Tx Jim
New Member
I have wiring diagram for later model 3 cylinder engine 2040 but I think it's different from 820 because diesel fuel is controlled at IP by electricity on 820 & manual cable on 2040.
Bat wire is red from circuit breaker,neutral start switch is black,alt light is red.
Bat wire is red from circuit breaker,neutral start switch is black,alt light is red.
There should be 4 wires to terminal 15. One should be a black wire that goes to the switch for thermostart. One should be a black wire going to ground the alternator light and air filter indicator light. One should be a black wire to start safety switch. Other one should be a black wire going to fuse 2 in fuse box. Terminal 56a should have a white wire to fuse #8 in fuse box. Terminal 56b should have a yellow wire that goes to fuse 7 in fuse box. Terminal 58 should have a gray wire going to fuse 5 in fuse box. Terminal 30 should have a red wire going to fuse 1 in fuse box.
The original switch pushes in to start the glow plugs and push button below to start. Only turns for the different light functions. Looks like a resistor on the back of it also. Never saw that before on a switch. I'll post a pic when I take it out again. Thanks for the replies!
Tx Jim
New Member
Yes sir I was surprised many yrs ago of needing to push key into switch to start a NEW JD 820 utility tractor.
FYI this model JD tractor has "no glow plugs".
FYI this model JD tractor has "no glow plugs".
Zebrafive
Super Member
The light switch on my 2030 has a resistor on the back (coil of resistance wire) I think it's to dim the "headlights" on the fenders (forward facing lights)
jmathews4117
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- John Deere 820
Did you ever get it wired in?
