No light
Checking method: check whether the coil wiring or circuit of the lowering solenoid valve is loose, broken, or damaged
A. There is loosening, crushing or damage, repair the circuit
B. No loosening, check the continuity of lowering button, replace lowering button
Tools: Multimeter; allen wrench; phillips screwdriver
Required information for warranty claims:
1. Photo of truck name plate;
2. Video of truck problem (No lowering and light of lowering solenoid valve is off; testing the continuity of lowering button)