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Okay, with the hour meter disconnected, I also connected the kill wire back to the ignition coil, and then jumpered the yellow and yellow/white together and then....IT STARTED! You were right, I wasn’t getting +12V previously to the fuel solenoid after removing the hour meter. Now I need to...

Okay, I finally got a hold of jumpers. I bypassed the PTO and brake switch by shorting both the purple and purple/white wires on each one. I also bypassed the seat switch by placing a piece of business card between the tiny slot on pins 2 and 3. I removed the starter motor and checked the...

Thanks for your response. I’m aware that these are solid state magnetos/ignition coils. I don’t think this is an ignition coil issue. Like I said, with the kill wire detached from the ignition coil, the mower will start up. What doesn’t make sense to me is why the kill tab shows that it’s...

Yes, with the kill wire detached, I measured from ground to the ignition coil’s kill tab. I re-did the measurement and it is currently measuring 0.3-0.4 ohms. This is with the ignition switch on the run position. I also just measured the RIO switch in the transmission (two nubs). I switched it...

That is with the coil wire disconnected from the ignition coil. The only thing that seems to be pulling the kill wire to ground right now is the ignition coil itself. I’ll have to remove the starter motor this weekend to double check that there’s no kink where the kill wire is mounted.

Thanks for your response. I plan on making some jumpers this weekend and trying your suggestion.

Thank you for replying. Definitely no screw on the kill wire. This is the one I ordered: https://www.amazon.com/gp/product/B074CN2P1Q/

Thanks for your response! I'll try disconnecting it and seeing if that changes anything!

Thanks for sending this schematic! I think you're mentioning the kill wire, but I was actually asking about the kill tab on the ignition coil itself. Are you saying the kill TAB is supposed to be grounded as soon as I bolt it on? Where is the kill tab on this schematic? Would it be considered...

I guess I can start replacing switches even if they're checking out as good on my multimeter. Not sure if I'm at that point though. I've yet to remove the starter motor to check for a kink on the kill wire. After a long day at work and having to make dinner most nights, I might have to do it...

Thanks for your suggestion. Yes, I've placed a weight on the seat to simulate having the seat switch engaged. I can also confirm the seat switch is working correctly because if I pull the PTO lever to ON, the kill wire will show open load, versus a short (with the ignition key at RUN) if I...

On the D100, I don't think there's an in-line diode with the kill wire. In my manual, only the D140 and above have the in-line diode.

Thanks for your response! On my mower, I just don't see a physical switch for the RIO (S6). Should I just measure for continuity on the two nubs that I think are the switch?

To answer your question, I switched the multimeter to DC voltage and had one probe on the kill wire and the other on the battery negative terminal. Then, I switched the ignition switch from OFF, to run with lights, run and start mode to check to see if there were any stray voltage spikes. There...

Thanks, I'm aware of that! In the John Deere D100 manual, it strangely calls this button, the "RIS" button.

Thank you for your reply. I've verified that there isn't any stray voltages on the kill wire. I tested it while switching between all the different combinations on the ignition switch.

Is there any way to test this nub (or is this the switch)? If I'm reading the schematic correctly, placing this in reverse should close this switch, right? So, in reverse, this should be shorted, and in any forward position, it's open?

Thanks for your response! With the ignition switch ON (Run position) and with the kill wire disconnected from ignition coil, the ignition coil's ground tab measures continuity to ground, which I find bizarre. The ignition coil's ground tab is always ground regardless of the key position. With...

Sorry if I misspoke, but I meant the kill tab on the ignition coil itself. No one has given me an answer yet, but is that supposed to be grounded as soon as I bolt it on? That kill tab is measuring a short to ground as soon as I bolt it on. I don’t see an actual switch on the transmission. All...

Hi, Yes, I checked the ignition switch by fully unplugging it. I checked all positions. Without anything attached to it and at the Run position, M and G are open. The model number of the D100 is: 1GXD100ELBB138416 Btw, is the kill wire tab at the ignition coil normally supposed to grounded...

Hi, I have a John Deere D100 that I’m trying to troubleshoot and is driving me insane. This D100 has a Briggs and Stratton 31C777 engine that I think has an electrical issue. Right now, I have NO SPARK with the kill wire attached to a new ignition coil. I ended up buying a new ignition coil...