Reverse lighting wires

PCULQUI

MEMBER
2005 TOYOTA SIENNA
3.3L
V6
4WD
AUTOMATIC
108,000 MILES

Just installed my aftermarket radio to my vehicle. Am installing a backup camera now. All the connections to the back of the radio are done. Just have to run the wires to the back of the vehicle. Can I remove the side panel in the rear of the vehicle where the rear speaker is to make the connections or do I have to go to the rear hatch door and remove the panels there to make the connections.

5 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Good morning,

If you are trying to install a back up camera, you need to run the wires to the camera at the back of the car.

Do you mean hooking them to speaker wires?

Please explain?

Roy

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Wednesday, August 19th, 2020 AT 4:44 AM

PCULQUI

MEMBER
354 POSTS

No, I just thought I could open the side panel where the speaker is and find the reverse lighting wires (red for power and white for ground or black).

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Wednesday, August 19th, 2020 AT 6:12 AM

ASEMASTER6371

MECHANIC
52,797 POSTS

Okay, got it.

I am concerned. You can hook up to your back up light wire but you may overload the circuit. It was not designed to run a camera, just the light. The increased current load may pop the fuse. Whatever you do, do not install a larger fuse.

You will need to wire in a relay to make it work. On the newer cars, the camera works off the body control module so this is not an issue.

Just wanted you to know the possible issues.

Roy

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Wednesday, August 19th, 2020 AT 6:17 AM

PCULQUI

MEMBER
354 POSTS

The backup camera needs power to function and needs to trigger when putting the car in reverse. Now, when the car is in park or drive, the reverse light is off and so will be the camera?
What are your suggestions to power up the camera. You stated a relay. How does that work and is it difficult to set-up.

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Wednesday, August 19th, 2020 AT 11:25 AM

ASEMASTER6371

MECHANIC
52,797 POSTS

I know the camera is only powered in reverse. It is the circuit load. It is the load that concerns me. The relay would reduce the current to next to nothing and not overload the circuit.

I would wire a relay. You need a 4 prong relay. The terminals are 30, 87, 86 and 85.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

You take the wire for the back up lights and put it to pin 86. Splice into the wire to the back up lights.

Pin 85 to ground.

Pin 30 is a battery voltage wire from the fuse block.

Pin 87 is the wire to the camera.

You can get a relay at any parts store.

Roy