JD 3020 Gas Fuel Gauge Won't Work

1terrygladys

New User
Hi, I'm new to this forum, but I can see there's a vast sea of knowledge out there.

I recently bought a 3020 gas for my son on his acreage. It's a 1964 model. The fuel gauge doesn't work. I bought a gauge and matching sending unit out of a combine. Put them both in yesterday, and can't get the gauge to work. There are two terminals on the gauge, two wires from the harness and 1 wire that is an independent ground wire going to a frame piece, added by a previous owner. I attached what I thought was the hot side of the wiring harness and the independent ground wire. I turned the switch on and it did not work. Then I got my 12V tester out and could not find electricity in either wire from the harness with the key turned on. So I'm stumped.

Any ideas would be greatly appreciated.
terry
 
<img src = "http://oi63.tinypic.com/zmbcif.jpg">

Note that black wire on "small terminal" at the gauge should have power from the ignition switch when switch is "ON".

The wire from the gauge to the sender is the orange wire.
 

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