706 G electrical problem

Quick question. I have 12 volts getting to the key switch. Switch is working fine but as soon as I turn the switch, my voltage drops to zero on both sides of the switch.
Some thing for sure is grounding it out.
I have been dreading this day since the day I got the 706. Wiring is sub par by any standard and needs to be redone.
But I need to get a few things done 1st!

Any ideas? I am a complete knob when it comes to electrical stuff on tractors.

What other symptoms do you have?
Have you cleaned the battery terminals?

Points are closed and the voltage drop is occuring across the coil and the ignition resistor.

Normal.

Allan

Is this happening just when you just turn the ignition ON or do you mean it happens when you turn further to the Start (crank) position??????????? Does it crank over when youre in the Start (crank) position??? (is the starter okay???)

As far as the ignition On/Off switching, theres obviously gotta be input voltage at the switches BAT input terminal, but over on the IGN output terminal its hot ONLY when ON cuz it feeds hot battery voltage to the coil when ON.

NOTE Neither of those switches Ignition terminals (BAT input or IGN output) should go dead when switched to ON (regardless if points open or closed), theres still hot battery voltage on the coils input (NOT to distributor) terminal and its ONLY the coils output (to distributor) that goes to zero volts when points closed as all the voltage should be dropped across the coil since with the points closed that point (coils output) effectively becomes ground via closed points to ground.

First thing I would do is remove, clean n wire brush n reatach each n every battery n starter n solenoid n starter n ground cable n connection as a bad connection or cable may be the problem.

If theres any dead short to ground as you mentioned, any wire from the battery voltage source to that dead ground short would act as a fuze n burn open. However, a resistive short may limit current so the wire wouldnt burn up although it may get hot if too much current flows through it......

Im NOT familair with that tractors wiring but some similar switches may have ballast by pass terminals or grounding terminals for other reasons
SOOOOOO are you sure the switch is wired correct???

John T

If one side of the volt meter is grounded, and the other side is used to check the voltage at the switch, and when off it has volts on the input from the amp gauge, and when turned on that voltage goes away, the wire from the amp gauge, or the terminal/s are corroded. The volts should stay at 12v on both sides when on. JimN

Normally when I turn the key to start the tractor the oil light comes on. And I hear the do hick jobber click on the carberator.
Then I hit the starter switch. Varoom!!!!

Now when I turn the key nothing happens. No click no light no Varoom!!!!

I swapped out the battery, Then I swapped out the switch. Then I said dang it!!! wheres the volt O meter grrrrrr.