7) The test result will show as below (See Figure 5.5.5). Back No-load voltage Test result No-load Voltage: voltage measured with accessories off. Load Voltage: voltage measured with accessories on. Figure 5.5.5 Charging Ripple: A vehicle's battery operates on one-way direct current (DC) electricity, while alternators output alternating current (AC) electricity. In this process, the power needs to go through the diode rectifier to turn into a direct current - that's when the ripple occurs. EN I 27