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Deere 4020 schematic
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Mrgoodwrench View Drop Down
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Joined: 03 Apr 2011
Location: CHICORA PA
Points: 2092 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Mrgoodwrench Quote  Post ReplyReply Direct Link To This Post Topic: Deere 4020 schematic
    Posted: 14 hours 10 minutes ago at 7:57pm
Anyone out there have an actual schematic for a 12v 4020 diesel? I’m doing an injection pump conversion and have lost power. The only thing working is the headlamps. Odd thing is that I have power to 2 of the three circuit breakers but I thought the dead one was the lights…..
There are 3 ways to do job GOOD, FAST, CHEAP. YOU MAY CHOOSE 2. If its FAST & CHEAP it won't be GOOD, if it's GOOD & CHEAP it won't be FAST, and if its GOOD & FAST it won't be CHEAP!!!!
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pirlbeck View Drop Down
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Joined: 01 Dec 2009
Location: West Central IA
Points: 230 		Post Options Post Options   Thanks (0) Thanks(0)   Quote pirlbeck Quote  Post ReplyReply Direct Link To This Post Posted: 2 hours 25 minutes ago at 7:42am
If this is a side console tractor there is an inline fuse under the dash cowl on the LH side. To the left of the PTO lever. If that fuse is bad you will not have any power to the key switch circuit. Also, once again if it is a side console tractor there are 2 heavy wires that connect to the alternator battery terminal, that originally both wires were crimped into one terminal end, check to make sure these 2 wires are connected. 
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