Is the small wire on the ignition module to ground out the ignition to stop the engine?

If it's a magneto or ignition module then its a kill wire. I know of no Briggs and Stratton engines that used battery powered ignition. So connecting the kill wire to the armature of the magneto (ignition module or engine case) will prevent spark.

Check the ground wire on your coil and see if it is loose or well grounded...

A few things can cause lack of spark at the ignition coil. This assumes pointless ignition system.

• The stop terminal is intentional grounded IE stop switch on.

• The stop circuit is shorted to ground.

Remove the plug wire from the plug so engine can not start. Remove the stop wire from the coil and try starting the engine while testing spark. If spark is now present then check the stop circuit.

• The coil pack itself is bad.

• Flywheel magnets are demagnetized.

These can check by seeing they attract heavy metal object strongly.

weak spark could be a ground problem or it could be module itself check the wires that go to the module for nicks or cuts if none exist I would lean more toward the ignition module

The ecm receives a signal from the crankshaft position sensor and sends timing signals to the ignition control module, whick fires the coil. The problem can be the crank sensor or the control module. The crank sensor is inside the distributor. I have pasted a test procedure below to help you troubleshoot.
1994-95 ACCORD EXCEPT V-6
See Figures 8 and 9
Remove the distributor cap, rotor and the inner cover.Disconnect the wires from the igniter.Check for voltage between the black/yellow wire and ground. Battery voltage should be present with the ignition ON . If voltage is not present, check the black/yellow wire between the ignition switch and the igniter.


Fig. Fig. 8: Terminal identification on engines without VTEC
Check for voltage between the green wire ("BLU 2" on VTEC) and ground. Battery voltage should be present with the ignition ON . If voltage is not present, check the ignition coil and the green ("BLU 2" on VTEC) wire between the ignition coil and the igniter.


Fig. Fig. 9: Terminal identification on VTEC engines
Turn the ignition switch OFF .Check the yellow/green wire between the engine control module and the igniter for continuity. Then check the BLU 1 wire between the tachometer and the igniter for continuity.If the wiring is OK and a problem still exists, the igniter is probably at fault.
Vtec engine



Non -vtec engine

Spray carb spray or starter fluid into intake hose then try to start. If starts then suspect fuel pump and or fuel pump relay. If does not start check spark. Pull off spark plug wire and ground to metal make sure no fuel is present and be careful not to spark yourself, crank car while grounding out wire if no spark suspect coil, fuse, ignition control module, crank sensor, wiring, or computer.

The only way to test an ignition module on any small engine is on the machine. Simple and easy.First remove the spark plug , then remove the wire that connects the module to the kill switch, its located right next to the plug wire above the laminations. Put a spark tester in the pkug boot and ground the other end. Pull the rope and look for a spark. Its that simple. If you have a spark, check the switch and wire, if you dont,check the grounding screws that hold the module to the block for a clean contact.If you still have no good spark its time to replace the Ignition module (coil).If you dont have a spark tester, ask someone dumb enough to hold it. If they jump and cuss you out you know you have a good spark

Disconnect small wire at ignition module. Then check for spark. If no spark, replace ignition module. If there is spark, then there is a short in the kill wire or engine control cable is not adjusted correctly.

I am unsure if your bike uses a coil or CID pack for the spark but whichever it has is most likely the cause. also if you have a kill switch then I would disconnect the wiring to make sure the switch is not grounding out the spark.

Had any check engine lights come on before you made any changes?
The ignition system uses an ignition coil, crankshaft and camshaft angle sensor along with the car's computer or PCM (power control module). This system can stop working due to a failed ignition module or crankshaft angle sensor.
Testing the ignition system is an easy job that takes about five minutes and can be done using a test light or an extra spark plug. Connect a test light to ground and with one of the spark plug wires or coils disconnected. Crank the engine over while holding the tip of the test light about 1/4 inch from the wire or coil terminal. Keep your hands clear of the test area to avoid accidental shock (non lethal). You can also insert a spark plug into the coil or wire and hold it against a metal ground. You should see a light blue spark in the gap .. which tells you the system is working. If no spark is present suspect that the crankshaft sensor needs replacing which is the most common problem.
But you could also check your relay/fuse box and see if any ignition related relays are bad. One way to check a bad relay is to find another one in the box that is exactly the same ans switch them ... and see what happens.
Helpful?
Good luck on your troubleshooting