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Looking for ignition/accessory wire to ACM

Mosey

Well-known member
First Name
Chris
Joined
Jun 26, 2022
Threads
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Location
Michigan
Vehicles
2021 F-150 Powerboost
Hi, me again. I want to find the ignition/accessory wire used by the ACM to trigger turn on/off. I want to use it to trigger my Kicker Key 200.4 and a powered subwoofer. I own an XLT and therefore a standard non-BO radio. Currently I am using DC offset to turn on the Key and it’s blue trigger wire to turn on the sub. But in doing this the Key will send a “pop” to the speakers at about a 10 second interval even after the ACM has fully powered down; I don’t know why.

Back to the wire. I prefer not to go back behind the ACM, so looking for another more easily accessible location would be great. I can use another standard switched circuit - I use one for my dash cam - but the ACM behaves differently in that it will stay on for 10 minutes after the ignition is turned off. This probably means I will have to go behind the ACM, but as I said I would prefer not to.

Thanks, Chris.
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