Does the ignition switch have a diode - 2003 KTM 640 Duke 2

make sure all damage was repaired -and that new ignition system is flashed to the vehicle

was new ignition flashed to vehicle --or key checked for excessive wear --diode not damaged --wiring tested harness tested for short or damage also fuses and relays

kill switches ground out the coil circuit to the engine and shuts down both cylinders
check that you are on the right circuit

Check for a bad diode in the charging circuit. A shorted diode will draw the battery down.

These Briggs has two diode in the coil ground leads.

Here is few things that can cause this problem.

• Short to ground in the wiring
• Both diodes are shorted.
• 12v is somehow being applied to the coil circuit shorting the diodes and destroying the coil packs.
• Bad ignition switch keeping the coil packs grounded.

Step 1:
Start testing by first disconnecting both coil packs ground wires. If the engine now starts and runs you at least the coil packs are okay. If doesn't then both coil packs are bad. In this case don't reconnect until you can verify that 12v isn't being applied momentarily when operating the ignition switch. Proceed to step if the engine now starts.

Step 2:
Then reconnect the ground wires and disconnect the engine that feeds the coil packs and the fuel shut shut off solenoid and retest.
If the engine starts and runs. Then reconnect the harness to shut the engine down. This would mean that there either a bad ignition switch or a short in the wiring on the mower side and not in the engine side.
If it doesn't start start now after starting previously replace the diodes in the wiring harness paying attention to proper orientation of the diodes or replace the harness.

The PCM power relay is the furthest most relay opposite of the PCM diode, it is the front or rear of the battery junction box.

You can eliminate the seat swith by unplugging it and putting a paperclip in to make a jumper and trying it.

DO NOT JUMP OR ADD FUSE

the purpose of a is to change power levels like volts to amps or to ohms

SOUND LIKE IGNITION SWITCH LOCK CYLINDER BROKEN IF YOU CANT TURN KEY.OR YOU HAVE THE WRONG KEY IN THE IGNITION SWITCH.

it is a common problem with the connectons in the ignition. The contacts inside the ignition are made out of brass. (which is a soft metal with great conductive properties) and the contacts on the diode are stainless steel. you will either need to get a whole igniton and key from the dealer, or get a mechanic to by pass the security system. there should be some wires on the under side of the steering column. cut the right one and like majic your car will start. this goes for all gm cars with that diode in the key.