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Minneapolis Moline Tractors Discussion Forum

G1000 starter wiring

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Author  [Modern View]

02-12-2018 17:56:13

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So I'm trying to save myself a bunch of tracing. Have juice at the starter and solenoid and at ignition switch. But the switch doesn't activate the starter. The starter looks exactly the same as my 705 but the solenoids are different. the 705 has the round with 3 terminals but the 1000 has what looks like a solenoid from a ford truck- 4 terminals. Only 3 of those terminals are hooked up. Should all 4 terminals be hooked up? Also what about the neutral start switch- when should it have juice to it? When the key is turned on or when the key is turned to the start position? Also that small solenoid activates that big what I'll call starter gear throw in on top of the starter right? So if that small solenoid is bad it won't activate the starter, but I should still get some clicking or some noise at it, which I'm not, shouldn't I? I get absolutely nothing by turning the key. I just am suspicious of that solenoid not being right. Hoping this is simple- it's to dang cold to for complicated. Thanks

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02-12-2018 18:57:09

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 Re: G1000 starter wiring in reply to minniemo705, 02-12-2018 17:56:13  
It ran but has been sitting 10 plus years- cracked block- and it is diesel. Sounds like neutral switch. I have nothing at those wires no matter what I do with the key switch. So as soon as the key is in start one wire should be sending juice to that switch, but when the key is not being turned to start then there should be no juice at that switch?

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02-12-2018 18:42:59

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 Re: G1000 starter wiring in reply to minniemo705, 02-12-2018 17:56:13  
Did this system work in the past with 4 post solenoid and them fail, or was 4 terminal solenoid added after problems developed.

There are 2 different configurations for the Ford style 4 terminal solenoid. The difference is in the configuration for 2 small posts. The posts may be labeled S and I

Type 1: Solenoid has activating voltage input to S terminal and other end of internal activating coil is grounded through the mount. I terminal receives 12 volt battery voltage when solenoid is activated and sends this 12 volts to the ignition coil to bypass the coil resistor and give a hotter starting spark. Only used on gas or propane engines, not diesel. The I terminal has nothing to do with activating the solenoid.

Type 2: Voltage is applied to S terminal and I goes to ground. Either or both can go through a switch.

Neutral safety switch should be open when gear shift is not in neutral, and closed when shift is in neutral. One side receives voltage when start switch is activated to start position and current should flow through NS switch when gear shift is in neutral. This should activate the S terminal of your first solenoid and turn it on to supply voltage to the switch on the starter.

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