S4 N/A body has the typical tail lights and dash lights not working problem. I have already reviewed past posts on the issue. No fuses are blown. I can turn on dash lights and tail lights with a jumper wire from the disconnected head light switch harness. The harness has no visible damage anywhere. I pulled a headlight switch off a spare S4 that I know worked last time I messed with it about 4 years ago. However, it hasn't resolved the issue. Bench testing both switches didn't reveal anything, my test light never got power on tail or dash light prongs. Before I buy another headlight switch or drive back to the barn to retry them on the spare car, is there anything I may have overlooked? Thanks in advance.