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The voltage limiter is not completely grounded and is likely operating from a ground path provided though the high beam indicator bulb and high beam relay. Energizing this circuit removes this ground path. Not sure what dash you have, I assume it is based on a printed circuit board. If that’s the case I believe the voltage limiter is “plugged” into your circuit board. The FSM diagram I’m looking at shows a trace running from the voltage limiter to the high beam indicator blub with another trace providing the ground for both running from a PCB mounting screw. A fault with this trace will create your symptoms. If the entire cluster had a ground fault you would have other indicator/illumination lights inop.



Your looking at an entirely different diagram.