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Enabling rear speakers

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I installed rear speakers as described in the forum, now how do I get them to work, the results of googling it were take it to a Ram dealer.
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159" 2500 HR Window Van
117 Posts
If its a 2021 or earlier there are a bunch of videos/posts explaining how to do it. Push button a and b simultaneously to open engineering menu, scroll down and adjust the speaker setup from a 6 to an 8, etc etc....

If its a 2022 then I believe paying the dealer tax is currently the only known method. If you find a DIY way on a 2022 please share!!!!!
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