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Need to find an accessory signal in my trunk to get a remote turn on for my aftermarket amp. Running a Rockford fosgate p2002, it seems that it needs >10V for a remote signal, I tried using the woofer on signal (B41 pin 22) but wasn’t working, tested it at only 9.1V. Also when I did this my factory sub loses power. I don’t want to keep stripping wires in the harness and was hoping someone has found a good signal already, thinking possibly B42 Pin 11 but just hoping some people have gone through this already.
Yeah, a 10V on signal... It's like they're purposely trying to mess with us.
The closest I can see is, there is 12v power to the AM/FM antenna amp which is somewhere up in the driver's side C-pillar. But that might simply be "ignition on" power and not "radio on" power, I can't tell. Plus, it might be inside the car under the C-pillar trim and still not accessible to the trunk, I can't tell that either.
If it's simply an "ignition on" signal and that's ok with you then you could try that. Otherwise, you might need to run a wire from somewhere else, or a switch of your own.
...there is 12v power to the AM/FM antenna amp which is somewhere up in the driver's side C-pillar. But that might simply be "ignition on" power and not "radio on" power, I can't tell.
The AM/FM antenna amp is IGNITION ON. It receives 12V+ from the AV unit when the key is ON.
The AM/FM amp is accessible by removing the driver side C-pillar interior trim. Not hard to do but anything with those damn plastic clips... just be careful.
Last edited by ILM-NC G37S; Apr 24, 2021 at 05:34 PM.
Just an idea. It's not cheep at $30 but it should allow you to take the 10V "amp on" signal at the Bose amp or sub amp and bump it up to 12V to switch on your new amp.
The issue at work here is BOTH the voltage and the current delivered by the stock amp on signal in the OEM harness. Although this is probably the best source for an amp rack on signal, its also the most useless for most aftermarket amps. I can confirm the Rockford series of amps requires more current at a higher voltage than the Infniti will provide. The good news is you don't need a complicated circuit and often a simple smaller DC relay is all that's needed to make the system work. If you go this route, make sure you select a 12V relay with a modest current draw. Hook-up is relatively simple as the relay is used a a simple switch using the existing turn on signal to activate the relay to switch the battery voltage
In the end, I went with a slightly more sophisticated solution from Pacific Automotive. Their PAC TR-7 is a universal trigger module that work with an incoming sense voltage of 5V or greater so it will definitely work for the Infiniti. It also provides some nice latching options for custom installations and its a bit easier to install that making your own relay solution. I've had this module installed in my car audio system for over ten years and its given me no issues and works every time. The down side its still a $35 plus option. ($15 on
Accessory Signal in Trunk
