A 0 V to 25 V, 10A minimum DC lab supply is required for maximum power testing and efficiency measurements. For testing a Hewlett Packard 6010A DC supply provides power to the test board. Custom software is loaded to allow full output power from each stage when powered from their respective inputs. Four volt meters measure input voltage and current as well as each channel's output voltage and current. Input current is measured through a current shunt, output currents are measured across a 0.1 Ω precision resistor. A tektronics TDS5054B displayed oscilloscope measurements for voltage and current waveforms. To run maximum output power a custom LED load board was developed. A function generator set to 1.5 Hz 0 V to 5 V drives the Turn Indicator input for delay measurements.

The Turn Indicator LED load to operate with single LED fault detection needs to fall within 6.9 V to 7.7 V at 40 mA using four amber LEDs. The LED load for Lowbeam needs to fall within 10 V to 11.2 V at 70 mA using four white LEDs. The LED load for Highbeam needs to fall within 20.2 V to 22.4 V using eight LEDs, four for Lowbeam in series with four for Highbeam. The center of the string ties to HB_LED to allow shunt of the Highbeam portion of the LED string. The RBIN resistor to ground value for Lowbeam is 20 kΩ. The RBIN resistors for Turn Indicator and Daytime Running Light are 30 kΩ.