Aftermarket radio wiring harness color codes?

Tiny
RACINE BONNVILLE
  • MEMBER
  • 2005 PONTIAC BONNEVILLE
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 1,783,600 MILES
I bought an aftermarket radio wiring harness and need to a color code and function for each wire.
Friday, December 12th, 2025 AT 6:20 AM

1 Reply

Tiny
STEVE W.
  • MECHANIC
  • 15,268 POSTS
The attached are the diagrams for both the base and full optioned systems. The first 3 are the base radio without an amp. The others are the amp and digital (xm) modules. The base radio power and outputs are the same with the amp, they just go to the amp instead of speakers.
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Friday, December 12th, 2025 AT 12:01 PM

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