went ahead and tried two in parallel on one side. didn't work. With only one LED connected: 1. with DRL on, igniton on, LED flashes for about 0.5 seconds then off 2. with HL on,ignition on, LED flashes for about 2 seconds then off with two in parallel 1. both DRL and HL, LED's flash for about 0.5 seconds then off Very strange If someone has a service manual wiring diagram, any hints as to headlight sensor location ?