From a number of fault detection and the red light flashing to judge the fault should be in front of the SS plate and boot to protect SS plate D6065 green light can light up, brightness is no exception, SS plate power and 1/2 vo circuit can work. By 1/2 vo (SS plate SOS signal voltage test to determine whether there is a fault), instant boot SS plate is measured with a multimeter C6030 1/2 vo voltage (75 v) at the end of the normal, boot instantaneous measurement IC6005 (6) S0S test voltage, the voltage rise rapidly to the 12 v engine protection. So SOS circuit misoperation, SOS is measured with a multimeter circuit R6055D6036D6035R6118R6119R6120 found R6119 bad, after replacing R6119 SMD resistor, troubleshooting.rhcservice manual download site