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Discussion Starter · #1 ·
i just bought a 2000 500 xc sp and the premium only light doesnt come on when the key is in the prem position.i changed the bulb ,still no light.i put a timing light on it and toggled the switch back and forth from prem to reg and there was no change in timing.could it be the key switch or somthing else?
 

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Maybe this sounds silly, but you tested it with the engine running, correct?
 

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Doesn't the switch change the timing curve? So at idle it should still be the same advancement. At full RPM's it will only be 2-3 degrees of retardation. Please correct me if I'm wrong.
 
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