Amp Turn on Signal Problem....

[petemossmorrone]

just removed the amp on my 2016 ecoboost prem. and installed a new amp. I used the audio turn on signal on pin 1 of connector 2285b....i installed a PAC low voltage audio enable relay as well. IT works ... turns the amp on fine, turing off is another issue..it does turn of, sometimes twice...

When i turn the car off...the radio shuts down but the amp stays on and then i hear some strange sound in the speakers and then the amp shuts of. Then it turns on and off again making that static sound once more. Has anyone run across this before?

Sponsored

 

[buzz-dee]

just removed the amp on my 2016 ecoboost prem. and installed a new amp. I used the audio turn on signal on pin 1 of connector 2285b....i installed a PAC low voltage audio enable relay as well. IT works ... turns the amp on fine, turing off is another issue..it does turn of, sometimes twice...

When i turn the car off...the radio shuts down but the amp stays on and then i hear some strange sound in the speakers and then the amp shuts of. Then it turns on and off again making that static sound once more. Has anyone run across this before?

Are you sure that you used the correct wire for the audio turn on signal? AFAIK it's pin #1 on the c2385c connector (the brown connector at the DSP/AMP)?


I noticed that the amp turn on wire (factory setup) does not go dead when you switch off the ignition and even stays powered for a while after opening the door (even though the radio/touchscreen seems to be off already) It looks like that's the case with your setup, too. Did you change anything else in your audio system, or is it the amp only?

I guess your low voltage trigger is hooked up to a constant +12V wire as in the manual? You could try to use a switched power source (ACC). That way, the trigger would shut your amp (and itself) down when you open the door. With the amp dead, your noises should be gone too.

The only downside is: when sitting in your car with accessory power/ignition off, you cannot listen to music since the PAC trigger remains unpowered even though your HU can be switched on using the bezel button.

 

[Chef jpd]

Just a thought. When I removed my factory sub amp, I checked the wiring.
Turns out the turn on signal is only 6 volts.
Maybe the same for the front amp?

 

[buzz-dee]

Just a thought. When I removed my factory sub amp, I checked the wiring.
Turns out the turn on signal is only 6 volts.
Maybe the same for the front amp?

You're absolutely right, that's why he used the PAC low voltage relay. It uses the factory turn on signal and converts it into a +12V signal for the aftermarket amp.

 

[mumbles]

Like Chef_jpd says, the signal at pin 1 is only 6 volts. Since you are using a PAC low voltage relay, presumably the TR-4, it should accept 6v without issue.

If you have access to a meter, I would disconnect the brown connector and monitor pin 1 to see if you get two voltage spikes when you turn off the system... I wouldn't think you should as that would cause the factory amp to do the same thing.

Assuming that you don't see two spikes, I would double check your ground. If it is not at 0 volts, it could be causing the PAC to chatter giving you multiple turn offs and ons. If the ground checks out, you could have a bad PAC unit...

Sponsored