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Old 09-08-2019, 02:32 AM #1
96TrailSurfer 96TrailSurfer is offline
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Dual Camera System - Sanity Check Pls

Probably because I have nothing else better to do, I decided to set up a dual camera system on my Surf, mostly for offroad use.

I don't feel like running any more wires through the firewall, or through the tailgate to the cab, so both cameras will use a cheap 2.4Ghz wireless transmitter. Unfortunately, it's not coded, so only one transmitter can be on at a time.

I want to have two operating modes for this system:

(1) normal - rear camera comes on when I am in reverse;

(2) offroading - front camera is on unless I am in reverse, in which case the rear camera is on. This mode is useful when I am wheeling alone and need to pass a complex obstacle where I need to see what's ahead of me.

I think I figured out how do to this with a simple combo of a DTDP switch and a regular SPDP relay, but I would love for someone to check my logic.

To make sense of diagram:

- REV wire is hot when the reverse gear is on - I am sure I'll find it at or near the shifter to tap
- when Reverse gear is on, power is supplied to the rear transmitted via by a tap from the reverse lights
- when the DTDP switch is in the first position position, the REV wire is connected directly to the REV sensing terminal on the head unit. The second set of terminals is not used.
- When the switch is in the second position, the REV wire controls the relay. The REV sense on the head unit is connected to a 12V source via the second set of terminals on the switch making the camera input always on
- at the relay, when REV wire is off, power is supplied to the F7 terminal, which connects to a relay block in the engine bay and results in power going to F28 to turn on the front transmitter (if REV is off, the rear transmitter is off as well). When REV is on, relay output is off, but power is applied to the rear transmitter.
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Dual Camera System - Sanity Check Pls-dual-wireless-camera-setup-jpg 
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96 Hilux Surf - 1KZ-TE (EGR delete, turbo boost controller, catch can), 2.5" lift in the front (Tundra Bilstein 5100s, Eibach 620#, and SPC UCAs), 3.5" lift in teh rear (Fox racing 2.5 remote resi adjustable 3rd gen Taco shocks and LC 8.5 wrap coils), 1" body lift (4crawler), ARB bumper, with SmittyBilt XRC 9.5k Gen 2 winch, 33" KO2s, D2S projector retrofits

Last edited by 96TrailSurfer; 09-08-2019 at 02:43 AM.
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Old 09-08-2019, 11:40 AM #2
clearock clearock is offline
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What cameras do u plan 2 use? i don't seem to have luck with longevity, the cameras electronics do not like the offroad vibrations is my assumption....
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Old 09-08-2019, 11:48 AM #3
96TrailSurfer 96TrailSurfer is offline
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Cheap amazon cameras that claim to be IP68 waterproof and “seismic” resistant. We’ll see.
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96 Hilux Surf - 1KZ-TE (EGR delete, turbo boost controller, catch can), 2.5" lift in the front (Tundra Bilstein 5100s, Eibach 620#, and SPC UCAs), 3.5" lift in teh rear (Fox racing 2.5 remote resi adjustable 3rd gen Taco shocks and LC 8.5 wrap coils), 1" body lift (4crawler), ARB bumper, with SmittyBilt XRC 9.5k Gen 2 winch, 33" KO2s, D2S projector retrofits
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Old 09-09-2019, 01:30 PM #4
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Backup lights are indeed a 12V positive switched signal. It is a Red-Yellow wire. The switch that actuates it is on the trans (reverse switch for the manual trans, or part of the neutral safety switch on the auto). Best location to find it is probably on the II3 connector behind the glove compartment (connects the engine harness to to the body/dash harness) or where it connects to the gauge cluster. It is not associated with the interior shifter.

The diagrams you posted should work for the custom wiring.

-Charlie
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Old 09-09-2019, 10:22 PM #5
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Quote:
Originally Posted by 96TrailSurfer View Post
Cheap amazon cameras that claim to be IP68 waterproof and “seismic” resistant. We’ll see.
Just make sure u go through a company with a good return policy, I got mine of amazon, spent a bit extra but got all my $ back when they failed...
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