Urgent head unit install question!!!
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Senior User
Joined: Jan 2004
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Urgent head unit install question!!!
Ok, so I broke down and bought an Alpine CDA-9833 tonight...I'm pumped! 
On this new ford harness adapter, there is an orange/black wire titled "dimmer ground." The head unit doesn't have a dimmer ground wire, so do I tie this in with the deck ground or is it not used? Thanks in advance (trying to get this wired tonight). Ryan
On this new ford harness adapter, there is an orange/black wire titled "dimmer ground." The head unit doesn't have a dimmer ground wire, so do I tie this in with the deck ground or is it not used? Thanks in advance (trying to get this wired tonight). Ryan
Senior User
Joined: Sep 2003
Posts: 347
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From: Holland, Michigan
try leaving it alone. the dimmer circuit i think uses PWM (pulse width modulation . ie on and off really fast at 50% duty cycle) to dim the headunit lighing when headlights are turned on. that's why a separate pmw ground circuit. i would think that the new radio head would have this though. good luck
hope this helps
hope this helps
