You are trying to pull your power threw the amp gauge. The blue wire hooks from the terminal block to power. If you want to hook it to the amp gauge it will have to be hooked to +B because that is where you have the battery hooked to. Hooking it to +L or the alternator side of the gauge makes power go threw the gauge before it gets to the terminal block of key. If it were me I would hook the blue wire from terminal block hot side to the battery side of the 4 post relay.
The orange wire gets hooked from the I post on the relay to keyed terminal block post. The same post the coil wire hooks to.
I do not have a diagram with the 4 post relay and a amp gauge because the amp gauge was used on 800 tractors and the 4 post relay was used on 801 tractors so let me explaing something.
Look at this diagram. Wire your tractor to it. The only thing you should change is I have a wire running from battery post on the alternator to the battery side of the 4 post relay. Install your amp gauge in this wire.
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Today's Featured Article - Grain Threshing in the Early 40's - by Jerry D. Coleman. How many of you can sit there and say that you have plowed with a mule? Well I would say not many, but maybe a few. This story is about the day my Grandfather Brown (true name) decided along with my parents to purchase a new Ford tractor. It wasn't really new except to us. The year was about 1967 and my father found a good used Ford 601 tractor to use on the farm instead of "Bob", our old mule. Now my grandfather had had this mule since the mid 40's and he was getting some age on him. S
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