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post #14 of Old 04-30-2017, 05:31 PM Thread Starter
TMVB
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Join Date: Jan 2015
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If you're going to start from scratch, it will be slightly easier. Not much, but slightly. You won't have to buy as many Metra A harness connectors (70-1729 and 71-1729).

The hardest part will be sorting out how to connect the following:

A1 (Chassis Ground) to the Aftermarket HU, Factory HU and SWC.
A3 (12V Constant) to the Aftermarket HU, Factory HU and SWC.
A24 (Acc) to the Aftermarket HU, Factory HU and SWC.
A11 (SWC Ground) gets disconnected from Factory HU and joins Chassis Ground (A1).
A22 gets disconnect from the Factory HU and connects to SWC ONLY.
C9 gets disconnected from Factory HU and connects to SWC ONLY. This is the only factory wire that has to be cut. Unless you want to build a C Harness extension by harvesting the female C connector from the donor HU.

Oh and you should still connect the Aftermarket HU Illumination/Dimmer wire to the middle grey wire in the Climate Control harness.

If you use the attached wiring schematic, you can't go wrong.

As for a shopping list, here you go:

Get 2 of these. One for G and one for D.

Get one of these for H harness.

Get one of these for A harness.

Get 2 of these - one becomes a pin donor.

Get 1 of these.



I didn't include solder, heat shrink, electrical tape and a couple other odds and ends.

Hope this helps.
Attached Images
File Type: pdf Sport Wiring Aftermarket Updated.pdf (39.6 KB, 220 views)

'15 MSM Accord Sport 6MT

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