How to Troubleshoot & Replace Bosch AP4511814 / 00618624 Gas Range Spark Module

Replaced igniter board after determining no spark coming from existing board 

I located the oven igniter under the right side cooktop burners. I then replaced the electronic igniter. Don't buy Thermador. This is the third igniter and second mother board in 7 years. The stove was expensive to buy and repair. 

Replaced Dsi ignition device. Under left cooktop burners. 

Replaced ignition controller. 

Replaced ignition device. Had to do this a few times with repairman, so new it was not that difficult. 

Called a local appliance service company to fix a Thermador cooktop griddle not lighting. Gave them all model numbers and serial numbers when I scheduled the service so they could bring the part with them. Tech showed up and not only didn't have the part but had no idea what information I gave over the phone. Grrr.... To make it worse, he quotes me $500 to repair a $200 part, but was going to "do me a favor" and install it for $480. I don't think so. Got online and bought the part myself from AppliancePartPros.com (already knew which one it was before the tech even came out, he just confirmed for me that it was indeed that part that was bad) I received the part in 1 day and repaired it in 10 minutes.