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Old 11-08-2013, 10:46 AM   #1
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reverse ground wire

I am installing a new rear view monitor in my 2004 Challenger. I am trying to hook into the wiring under the dash. There are several wires with connectors on it, I have the power wire there and there is a white wire with reverse ground printed on it. Can I use this wire to ground my monitor?
Bryan & Teresa, 2004 Challenger 34 ft with the cutest little Mini for a toad
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Old 11-08-2013, 11:44 AM   #2
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I'm not sure what 'reverse ground' refers to. Is it a full time ground connection? You might test it with a multimeter or test light to be sure. There should be lots of ground sources under the dash, you can connect to any of them.
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Old 11-08-2013, 02:11 PM   #3
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Could that be a wire to the reverse light system to detect you are in reverse?
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Old 11-08-2013, 02:18 PM   #4
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If it is a wire for the reverse lights putting it in reverse and checking for a voltage at that wire would tell you. If it is just a ground wire then it is a ground. There are no differences in grounds. It acts as a return path for electron flow when something is connected to a power lead. Without a return path electrons won't flow. In AC a ground and neutral are the same.

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Old 11-08-2013, 02:31 PM   #5
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Quote:
Originally Posted by TeJay View Post
If it is a wire for the reverse lights putting it in reverse and checking for a voltage at that wire would tell you. If it is just a ground wire then it is a ground. There are no differences in grounds. It acts as a return path for electron flow when something is connected to a power lead. Without a return path electrons won't flow. In AC a ground and neutral are the same.

TeJay
There are some switched ground wires in 12 v systems, (dome lights, etc.) that's why I suggested to test it with a multimeter or test light before hooking up electronics.
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Old 11-08-2013, 05:47 PM   #6
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I believe that the wire becomes grounded when placing the transmission in reverse. This completes the circuit to turn the rear camera system on in reverse. My ADHD system will turn on automatically, with the power switch in OFF, when the coach is placed in reverse with the engine running. The first time this happened I started looking for a "problem" - The owner's manual did not describe this function. As I have found out some other automatic functions are also not described (i.e., BIRD). Pretty typical of all manufacturers. JM2...
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Old 11-08-2013, 07:13 PM   #7
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Hi "TeJay",
In the real world the electrons flow from the negative to the positive.
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Old 11-08-2013, 07:25 PM   #8
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Siggyd,
I did consider that I would get a comment regarding the flow of electrons. Actually when you're explaining the theory of electricity it matters not which way the electrons flow. The Air Force said that they flowed from negative to positive and the Navy said they flowed from positive to negative. They are both correct and both wrong. It's a matter of perspective I guess.

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Old 11-08-2013, 07:29 PM   #9
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electron flow

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Hi "TeJay",
In the real world the electrons flow from the negative to the positive.
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Old 11-08-2013, 07:41 PM   #10
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Ground and neutral aren't the same one is a bond to keep things at the same potential the other is a current carrying conductor
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Old 11-08-2013, 08:17 PM   #11
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Right you are Flair. Ground and neutral are separate until they get back to the service entrance where they are tied together. Under normal circumstances, neutral wire carries the same current as the hot wire and the ground wire carries no current. I have had some lively conversations with so called electricians concerning neutral vs ground.
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Old 11-08-2013, 09:11 PM   #12
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reverse ground wire

Thank you for all your suggestions and replies. Actually the wire is just hanging down from under the dash in the area where the old monitor used to be, maybe it was plugged in the back end of the voyager monitor I took out. Think it's safe to hook into or should I just ground it to something metal. Think probably would be safest if you don't know what you're doing?
Bryan
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Old 11-08-2013, 10:31 PM   #13
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The OP asked for the Time of Day, not necessarily how the Watch works.
Find a metal bracket such steering colum etc. and there is your ground.
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Old 11-09-2013, 12:11 AM   #14
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Quote:
Originally Posted by dennis45 View Post
The OP asked for the Time of Day, not necessarily how the Watch works.
Find a metal bracket such steering colum etc. and there is your ground.
Especially if he's unable to use a multimeter or test light, safest course is to just hook to a known grounded part of the chassis.
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