Hey Guys,
Sorry in advance if this is the wrong section, i was unsure which was correct one ? Plus im bit noob at this stuff!
Ive just purchased a Pioneer AVH-P4450. So basically Double din touchscreen DVD headunit which is 2012 model.
I've wired it all up using one of those lovely $15 repco harness so keeps the car harness all clean and tidy.
Currently its the deck running off the stock wiring and stock speakers and in 2000 celica it sounds quite good.
Down the track however im going to be switching to a proper amp and 4 aftermarket speakers. So with this in mind, I currently dont have the "handbrake" wire connected as i want to bypass it. I understand you need 4 pin relay and you basically ground out the relay, supply the "green" handbrake wire to one side of the relay and use the blue/white amp power wire to supply the power.
However my query comes from that fact that at the moment the power source will feed the relay only. But down the track when i want to wire in an amp, I want to know the wiring setup and if it will still work fine. Ive read that the Amp wire runs very low power and its purpose is to signal to the amp to switch on. However drawing some of that power to the relay, will this cause any issues or problems. Is there anything i should be looking out for or something else i should do ?

Here is a basic diagram of the image, the point im interested in is in the red circle. Basically Blue/White wire going to the amp and being split either part way/at the harness connection/wherever to feed the relay.
Also with the 2012 model of pioneer decks does this method still work for bypassing handbrake ?
Cheers guys, thanks for your time and help
Sorry in advance if this is the wrong section, i was unsure which was correct one ? Plus im bit noob at this stuff!
Ive just purchased a Pioneer AVH-P4450. So basically Double din touchscreen DVD headunit which is 2012 model.
I've wired it all up using one of those lovely $15 repco harness so keeps the car harness all clean and tidy.
Currently its the deck running off the stock wiring and stock speakers and in 2000 celica it sounds quite good.
Down the track however im going to be switching to a proper amp and 4 aftermarket speakers. So with this in mind, I currently dont have the "handbrake" wire connected as i want to bypass it. I understand you need 4 pin relay and you basically ground out the relay, supply the "green" handbrake wire to one side of the relay and use the blue/white amp power wire to supply the power.
However my query comes from that fact that at the moment the power source will feed the relay only. But down the track when i want to wire in an amp, I want to know the wiring setup and if it will still work fine. Ive read that the Amp wire runs very low power and its purpose is to signal to the amp to switch on. However drawing some of that power to the relay, will this cause any issues or problems. Is there anything i should be looking out for or something else i should do ?

Here is a basic diagram of the image, the point im interested in is in the red circle. Basically Blue/White wire going to the amp and being split either part way/at the harness connection/wherever to feed the relay.
Also with the 2012 model of pioneer decks does this method still work for bypassing handbrake ?
Cheers guys, thanks for your time and help

) you have your diode correctly oriented.
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