Gone are the days of craning our necks to see blind spots or using paper maps to find our way – you can now customize your car or truck with these wiring diagram theories, to have a reversible camera display and GPS installed.

User posted image

Next, installing a GPS that’s bolted into the dash as opposed to having wires everywhere.

User posted image

During your installation remember that the power source is connected to one side of a coil and the ground to the other – when 12V is applied it creates a magnetic field that closes the switch.

 


Forum Threads


PwrRngr

Joined: Jul 19 2007
Posts: 4407
Post Fri Apr 22, 2011 3:59 am

Yes the grounds are necessary on the relays. The power source is connected to one side of a coil. The ground is connected to the other side of the coil. When 12V is applied across this coil, it creates a magnetic field that closes the switch above. Without the ground, the relay won’t do anything.
FreakShow

Joined: Oct 07 2010
Posts: 12
Location: Afghanistan – for now…
Post Fri Apr 22, 2011 6:59 am

Ah, so that’s how they work. You learn something new everyday! Does everything else look like it should work, then? I would imagine the GPS will work without a problem (I may throw in a switch between the remote wire and the relay even to limit when power is being drawn by that circuit).
Do you think the switch for the backup camera will work to fool the HU? I suppose that’s the part that I’m most leery about right now.I appreciate the assistance!FreakShow
bad venge

Joined: Jul 28 2007
Posts: 3550
Post Fri Apr 22, 2011 9:12 am

You REALLY don’t need the relays in either case. You can wire either into a switched source like the head units switched power wire, or use an add a fuse and wire both together.

The switch to turn on the camera should work fine you can leave it on to run all the time as well.

FreakShow

Joined: Oct 07 2010
Posts: 12
Location: Afghanistan – for now…
Post Fri Apr 22, 2011 8:39 pm

Ok, I’ll have to take a look at the HU wiring diagram when I get home again then. The main reason that I threw the relays into the mix here was that I wanted the GPS and rearview camera to only come on if the HU was on. I figured I could just hard wire them into the power to/from the HU but I wasn’t sure how it would handle that kind of power draw. Having the relays would allow me to only provide them power when the truck/HU is on but also draw power straight from the battery/alternator.

You don’t think that the GPS and camera would be pulling too much power and possibly draw more than the 10amp fuse in the HU can handle? Would that affect the output power levels to the amp and subs?

I appreciate all of your help!

FreakShow

bad venge

Joined: Jul 28 2007
Posts: 3550
Post Fri Apr 22, 2011 9:52 pm

Most head units have a 15 amp fuse in the cars fusebox the head unit has a 10 amp you have 5 to spare the gps pulls very little as does the camera … as mentioned if you are concerned use an add a fuse on the radio fuse slot
Tat2Dragons

Joined: Jan 21 2007
Posts: 3404
Location: Baltimore Maryland
Post Sat Apr 23, 2011 3:21 pm

Hey there FreakShow, as usual lots of good info in here. icon_cool.gif I just thought I’d chime in because my setup just happens to be very similar to what you’re describing. As for connections, I grounded my camera only a few inches away from itself and the cameras power wire I wired in with the head units switched power source, so it’s powered whenever the head unit is on. I wired the head units reverse trigger wire to the positive reverse light wire and also to a hidden dash mounted rocker switch. I used a diode to prevent voltage from back feeding. I prefer having it wired this way because it allows me the option of turning it on anytime I want, not just in reverse. As for wiring up your GPS, I have a Garmin Nuvi 765T in my ride and I have it hardwired/tied into the head units switched power source, fused of course. I also have a somewhat similar GPS mounting as to what you are trying to do, except I purchase a billet aluminum ball mount from an Ebay seller that looks and works great.

Here’s some pics for your viewing pleasure.lol:)

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FreakShow

Joined: Oct 07 2010
Posts: 12
Location: Afghanistan – for now…
Post Thu Apr 28, 2011 3:02 pm

Tat2Dragons, that looks awesome! Thanks for the info. I’m glad to see that it’s working out for you and that someone else had roughly the same idea that I did! Maybe I’m not as crazy as I thought.

A quick question: (I can’t see the first three pictures – they may answer the questions, if they do I apologize) Is your dioded installed so that it prevents backfeeding to the reverse lamp? I’m assuming that this is the case but we all know what assuming does…

So theoretically if I had my reverse trigger hooked to a constant power source with a switch I could turn the reverse camera on even while driving forward?

Now I just gotta find the wiring harness diagram to figure out which is my switched power wire again!

Thanks for all the advice again, fellas!

FreakShow

bad venge

Joined: Jul 28 2007
Posts: 3550
Post Thu Apr 28, 2011 3:28 pm

CHEVROLET / SILVERADO / 2006 / Remote Start

12volts red (40A), red (40A) + ignition harness
Starter yellow + ignition harness
Second Starter N/A
Ignition pink + ignition harness
Second Ignition white + ignition harness
Notes: To avoid the check engine light from coming on and possible damage to the automatic transmission, the second ignition in this vehicle MUST be powered when adding a remote start system.
Third Ignition N/A
Accessory orange + ignition harness
Second Accessory brown + ignition harness
Keysense lt. green – ignition harness
Power Lock use Directed module 1700G
Notes: If interface module is not available, refer to DirectFax document 1601.

Tat2Dragons

Joined: Jan 21 2007
Posts: 3404
Location: Baltimore Maryland
Post Thu Apr 28, 2011 3:44 pm

FreakShow wrote:
Tat2Dragons, that looks awesome! Thanks for the info. I’m glad to see that it’s working out for you and that someone else had roughly the same idea that I did! Maybe I’m not as crazy as I thought.

A quick question: (I can’t see the first three pictures – they may answer the questions, if they do I apologize) Is your dioded installed so that it prevents backfeeding to the reverse lamp? I’m assuming that this is the case but we all know what assuming does…

So theoretically if I had my reverse trigger hooked to a constant power source with a switch I could turn the reverse camera on even while driving forward?

Now I just gotta find the wiring harness diagram to figure out which is my switched power wire again!

Thanks for all the advice again, fellas!

FreakShow

Your quite welcome Sir. and thanks for the complement, I appreciate it. icon_smile.gif Yes, the diode prevents voltage from back feeding into the reverse light circuit. If a diode was not in place the voltage back feeding into the circuit would cause the reverse lights to come on anytime the switch was turned on, which while driving down the road is not something you’d want. Also, yes…if you have your switch wired to a constant 12volt source, it would allow you to turn it on anytime you’re driving. I’d recommend that you wire it to a switched source though and also wire it to your reverse light power wire, this way it will come on whenever your vehicle is in reverse and whenever you decide to turn on your switch. icon_cool.gif

FreakShow

Joined: Oct 07 2010
Posts: 12
Location: Afghanistan – for now…
Post Thu Apr 28, 2011 3:52 pm

Ok, so it looks like I’ll be tapping the Orange wire. Too easy.

Nice, I like the idea of being able to selectively choose when it’s on and also having it turn on whenever I’m in reverse. That wouldn’t be too difficult to wire up either. I’d basically just be installing it the way you have it set up and the way I planned on setting it up and tying the two into the reverse trigger. Too easy! You guys rock.

Thanks again!

FreakShow

Tat2Dragons

Joined: Jan 21 2007
Posts: 3404
Location: Baltimore Maryland
Post Thu Apr 28, 2011 4:18 pm

You’re welcome. Yeah, I find being able to turn the reverse camera on anytime I want very useful and I’m sure you will too. icon_smile.gif