This happened to me when I used a HID ballast that wasn't canbus-smart. The battery icon lit up, the spoiler started going absolutely mental and forcing itself closed and open. I switched for a canbus one and it solved it.
Swap your ballasts for canbus ones and you'll be fine.
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Porsche Boxster S Type 986
Bi-xenon Headlight Upgrade | 987 S 18" Anthracite Alloys | Android Head Unit | 5000k 55w HID's | 5000k Cree DRL's | 5000k Cree number plate lights | Cree LED Indicators | One-touch roof operation | Bypass exhaust pipes | Parking sensors | Ambient footwell lighting
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