Headlight and ignition button not working - 2000 Suzuki TL 1000 R

What works? Just headlights? Does anything electrical work that does not need the ignition switch to be in the on position? Possibly four way flashers, brake lights, horn, interior light, dash lights in instrument panel as well as headlights should all work without the key in the ignition and in the acc or on position. If this is what you have, then I would say you need to replace the ignition switch.
Hope this helps.

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Either there is a problem with your starter button being dirty or broken ( a new problem. The starter button is designed to shut off the headlight light then power the starter solenoid. If the button is dirty or melted it could be the cause of the malfunction. Open the right switch assembly, clean and inspect the button. Or the problem is with the new contact base of the ignition you installed on the motorcycle. If you have the old contact base from the old ignition switch, you could try exchanging the two bases to see if the problem is the new contact base. To take off the base, insert the key , rotate the key to the on position, push in the three tabs on the contact base cover, and pull off the cover the contact base should come off with the cover.

You may have a separate headlight fuse that is blown. You could have a dirty or broken contact base on your ignition switch that is not supplying power to that part of the bike. Or you could have a dirty or broken starter button . The starter button when pushed in half way, turns off the headlight. when it is pushed in all the way it engages the solenoid. If it the button try cleaning it. If that does not work you will have to replace the switch assembly.

You either have a broken/disconnected wire or you have a bad starter button. The starter button is a two position switch. Push it in half way and the headlight turns off. Push it in all the way and the solenoid engages the starter. The button is either dirty or broken.

Could be the headlight fuse, a burnt out bulb (hook it directly to the battery to test it, but do not touch the glass with your fingers or anything oily) a dirty contact base on the ignition switch, a broken wire, or more likely a bad starter button. When you push the starter button in halfway it turns off the head light before it engages the starter. If it is damaged or dirty it can cause the headlight not to work. Try wiggling the button or take it apart and clean it.

could be a problem with the ignition switch

The two most likely culprits are the ignition switch and the starter button. The starter button, in the right handlebar switch assembly, performs two functions: cranks the electric starter - and, at the same time, turns off the headlight. Sometimes the electrical contacts inside the starter button burn out and fail to reconnect the headlight circuit when the button is released.
You can easily determine which one is the problem by simply checking for battery voltage at the headlight fuse. No voltage means the likely cause is the ignition switch. Also inspect the large plug on the bottom of the ignition switch. Sometimes the individual connectors will corrode, melt, or push themselves out of the plastic housing.
If there's voltage at the headlight fuse, then plan on replacing the right handlebar switch assembly.

Hi and welcome to FixYa,

On a VT1100, primary suspect would be the START button switch (not the ignition/key switch). The start button switch is actually made up of 2 switches:

• in normal condition it switches power to the headlight dimmer switch;
• when starting, power is switch OFF to the headlights to ensure that the starter gets all the power from the battery.

Good luck and thank you for asking FixYa.

Check the ignition switch.  The headlight power runs through the ignition switch, and this turns off the headlight when the starter is engaged, which provides full battery power to the starter without the load from the headlight.  If there is damage to the starter button, it may be shorting out and causing the problem.