ripped_fear Posted January 10, 2017 Share Posted January 10, 2017 Evening all. Looking for some guidance, I'm fitting an under seat sub to the supra, and I have been looking at the wiring diagram (show below) and I have a question looking at the + terminal. In previous installs I have ran a fused + wire directly to the battery, and then you have an additional wire that runs to the Head unit to activate it, this sub doesn't have this. So looking at the pictures I looks like I have to splice into a + from the fuse box? One I'm assuming must be a switch ignition positive to avoid it running down the battery. If this is correct anyone know of an appropriate wire around the passenger foot well area? be nice to keep the wiring minimal so something in this area rather than running all the way to the headunit would be great. Thanks for any help Jake Quote Link to comment Share on other sites More sharing options...
Marty Posted January 10, 2017 Share Posted January 10, 2017 According to that the blue / white is your switched live? Does your head unit not have an output switched live? Not sure i follow I have the supra wiring diagrams if you want that buddy? Quote Link to comment Share on other sites More sharing options...
ripped_fear Posted January 10, 2017 Author Share Posted January 10, 2017 According to that the blue / white is your switched live? Does your head unit not have an output switched live? Not sure i follow I have the supra wiring diagrams if you want that buddy? my bad so the yellow can go direct to the battery terminal? and the blue and white is the switched ? Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted January 10, 2017 Share Posted January 10, 2017 Yellow is permanent, blue / white is switched. There should be a blue / white wire on your head unit look you can connect it to. Either connect yellow to the battery terminal, of if you want to hide It, there's a post in the fuse box you can connect it to. Quote Link to comment Share on other sites More sharing options...
ripped_fear Posted January 10, 2017 Author Share Posted January 10, 2017 (edited) Yellow is permanent, blue / white is switched. There should be a blue / white wire on your head unit look you can connect it to. Either connect yellow to the battery terminal, of if you want to hide It, there's a post in the fuse box you can connect it to. Thanks for confirming that. Is that in the engine bay fuse box? that would be much better to keep it tidy. is it simple enough to conect to? and which terminal? Edited January 10, 2017 by ripped_fear (see edit history) Quote Link to comment Share on other sites More sharing options...
Ric Posted January 11, 2017 Share Posted January 11, 2017 I have a question looking at the + terminal. In previous installs I have ran a fused + wire directly to the battery, and then you have an additional wire that runs to the Head unit to activate it, this sub doesn't have this. It does. from the diagram the yellow is the wire you should connect to the battery. The blue/white would connect to the stereo so the sub only turns on when your stereo is on. They are usually labelled (remote) on the head units. Just take it straight to the battery with a decent terminal so it looks nice. Perhaps running a thicker gauge to a take off fusebox inside the car. Perhaps something like this: Or you could take from the post in the fusebox to an internal fusebox for future use. Then you'd also have an easily accessible place if you need more 12+ constants Quote Link to comment Share on other sites More sharing options...
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