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1990 964 C2 rear spoiler only deploys at 70mph and not manually

Electrical and Electronic

Vehicle Information: Model: 964 C2; Year: 1990; Body Type: Coupe; Total Mileage: 90000;

My rear spoiler on my 1990 C2 will only seem to deploy at 70mph. It would properly deploy at 48mph intermittently for about a week. The manual switch also intermittently works. Now the switch stopped working and it seems to only deploy at 70 instead at 48mph. Could this be the control unit malfunctioning? I already replaced the manual switch and it did nothing. It is annoying everytime I hit 48mph both the wing warning light and warning light go on. Does anyone know where I should start? I am about to get it serviced should I just let my mechanic figure it out?

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