Dear all ,
Can some told me the input & output of the Amp
there is three plugs which one is the input and the output of the Amp and the third plug for what ?
Please look at the pic below



My LS430 have similar to this Amp

 

The three plugs in your car can only go in their own place. Each plug has a unique size and none can go into the other plug's place.

 

I know that my friend but I want to know which one is the Input of the Amp & which one the output ?? and what is the third one ??

 

There isn't ready a short and easy way to answer this question, so here goes... The 3 connectors shown on your picture are (from left to right) S28, S29, and S30. Pin-out for these connectors are depicted in the sketch below (note that the connectors are shown up-side-down as compared to your picture). I have attached an electrical schematic showing connectivity and wire color for each pin on each connector. On the electrical schematic, S28 is denoted in a circular symbol labeled "A", S29 is "B", and S30 is "C". Please let me know if you have questions.

 

What a great resource - thank you!

I'm wondering if I can splice a Bluetooth receiver into the speaker wiring for BT connectivity...

 

I combine the image of the plugs with the schematics doc to create one .PDF - attached.

 

It's really useful thanks brother