![]() I ended up connecting a wire with a loop connector to a one of the screws near the HU that inserts into metal (because I had 6+ ground wires from the camera, steering wheel control adapter, and 12V>6V converter, to ground to so I spliced them all to that single ground wire). Cut and connect the orange ground wire to some sort of chassis ground - either the brown ground wire (by "tapping" into the brown wire, not by cutting it and then connecting it!) on the power/audio wire harness (see pic in step 3) or to some metal part that you think is grounded to the chassis. Be careful to insulate the core from the shield wires (I used 3M 33+ electrical tape) to prevent any electrical shorts.ī. The RCA cable will go to the HU video (RCA) input jack. Cut and solder the black (V+) and white (V-) wires (the ones coming out of the car, not from the adapter bracket, which will not be used or connected to anything) to the core and shield parts, respectively, of a (cut) RCA cable. I'll be using this ( ) 12V>6V converter that I found off a TN thread about the same issue.Ī. Connect the ground wire (from the backup camera) to the stock (brown) ground wire in the stock wire harness.Ī bit of a pain but at least now I know what to do. ![]() Connect V+/V- wires (from the backup camera via wiring to a RCA male connector) to the aftermarket HU's RCA female input jack for video input from the backup camera to the HU.Ĥ. Connect the reverse wire (from the stock wire harness) to the aftermarket HU's reverse detection wire to display the video from the backup camera when in reverse.ģ. Probably a good idea to put a fuse in between the two (12V source and backup camera), which is easier if you use a fuse tap.Ģ. by splicing into the 12V ACC wire from the stock wire harness or by using a fuse tap to use power via the fuse box) via a 12V>6V step down converter that will reduce the 12V (probably best to use ACC than Batt so it's only 12V switched) to 6V. Connect the backup camera's input power wire ("CA+" on the wiring schematic above) to a 12V power source (e.g. doesn't have the convenient wires going to the small display under the center dash grille since the backup camera displays on the stock HU only), you will need to:ġ. ![]() So it seems that to use the stock backup camera with an aftermarket HU in a Sienna with navigation package (i.e. Given that my multimeter is not top of the line ($55 from Lowe's), it's probably safe to say that the stock backup camera gets 6V all the time when the car is on (didn't test ACC vs ignition though) and the reverse wire to the stock HU gives 12V but only when in reverse. The reverse wire that goes into the stock navi HU provides about 13V but only when in reverse. I tested with a multimeter today and the power cable to the stock backup camera is, indeed, about 6V (actually, fairly consistently ~6.7V), and is powered when the car is in reverse or not. Is there anywhere that I can get a specific harness pin layout of the wires? Is this correct? So I should look for a harness with 3 wires (red, black, white) and connect the black wire (V+) to the RCA core wire, the white (V-) wire to the RCA shield, and the red wire to the backup trigger? Only problem is that when I looked at all the wire harnesses connected to the stock stereo, none of them have only those wires (there are three harnesses with other wires in addition to white, red, and black). The question is, which wires do I use? I saw a thread on TN that mentions that you can use the #3, 15, and 16 plugs on the harness, but I looked at my stock wire harnesses and none of them have 16 plugs, so not sure if that's referring to a stock harness or not.Īnyone have any info that could help me figure which wires to connect to a RCA plug to use my stock camera?Įdit: here's a photo of the wiring schematic from the Toyota tech website that seems to show the wiring for the backup camera. And then connect the receiver's backup wire to the backup trigger wire on one of the stock wire harnesses. I looked at a bunch of threads here and on TN and it seems that my best bet is to find the video+ and video- wires from one of the stock wire harnesses and cut them and solder them onto a RCA plug. The Sienna, of course, has a bunch of wire harnesses and no RCA cables. I just bought a Kenwood receiver with a RCA input for backup camera.
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