Pioneer 500 Ground Trigger DIY Harness.

Pioneer 500 Ground Trigger DIY Harness.


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This is a plug-n-play harness to connect a ground trigger point for the Pioneer 500. It plugs into the gear position switch behind the battery box providing a grounded trigger point that ONLY works in reverse. 


  • Ground trigger for accessory.
  • Ground relay trigger. 
  • Backup camera trigger. 


  1. Ground trigger wire only. It will line will "ground" when in reverse.
  2. Pigtails. This adds a positive line for simplifying auto backup lights or other auto reverse item. It adds a positive lead long enough to reach the hood area that you must supply 12v+ Key-on power. It also provides a 1ft lead and 2ft pigtail for your desired accessory. Ex lights.