“Does the Pioneer FH-S501BT harness not require the orange wire for illumination? The Pioneer harness it came with only has speakers, Blu/wht, battery, grnd, red & that's it. Does this model not require the illume wire or does the illume work without one?”

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• I somehow feel cheated that Pioneer could not add 1 more wire for the dimmer. I expect better from a name brand company.

  Answered by Anonymous 7 years ago

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• The "Illumination" wire is used to dim the display whenever you turn on your parking/headlights. Not all models have this connection, and must be done manually through the settings menu.

  Answered by AgentJ 7 years ago

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