Backfeeding power via toggle switch to the gear shifter reverse switch

[KPC]

Whew, I hope this is able to be understood, it is rather difficult to explain.

[Boloiii]

The reverse switch is a ground (negative) circuit and back feeding power would cause a dead short. For what you want to do, you would be better off forgetting about the reverse switch and just wiring it in through just a toggle switch. The reverse switch does feed the signals you spoke about. If you go with just the toggle you will not need the relay. Just run fused power to the toggle and then back to the light and then the ground to a spot on the frame of the machine.

[KPC]

Didn't know it was ground, but in all actuality, it doesn't matter if it is positive or negative.

If it is negative, I'll simply feed power directly to the relay, and connect into the reverse switch wires to trip the relay when the gear shifter is put into reverse (turning on the reverse lights)

But if I'm traveling foward, and I run a toggle switch that goes to ground, and connect into those factory reverse light wiring, and if the machine is moving forward and I flip the toggle switch, it is going to ground out the same wires also turnning on the reverse lights. (this will be good, because the lights will always come on when I put the machine into reverse, and if I'm parked or moving forward and for some reason I want to have lights shining out the rear of the machine, I can just flip the toggle switch)

but what I'm worried about, as I said in my first post, is back feeding (in this case, the back feeding will essentially be just a ground) but will the machine think that it is being put into reverse while I'm actually traveling 30mph forward, thus doing damage to the electrical system, or the CDI.

In other words, with many newer cars, the gear shifter isn't a mechanical cable that connects to the transmission (I know it is mechanical on the brute, but just follow me on this). In new cars, the gear shifter is just a selector switch, that tells a set of servo's on the transmission, what gear to go into.

So on these newer cars, if you would do what I want to do with the Brute, and if you were going along at 30mph forward in a car, and tricked the gear selector by either putting power into the reverse wire (if it was a positive system), or putting the reverse wire to ground (if it was a negative system) it very well might tell the servo motors on the transmission to put the car into reverse, while you are still going 30mph forward. (That is if the computer isn't connected into the speed sensor that idiot proofs the system but that is a whole other topic)

What I'm trying to get at, is it possible to back feed, in this case "ground out" the reverse light wires while the quad is moving forward, without the reverse rev limiter kicking in, or downright doing damage to the electrical system. Simple as that.

[Boloiii]

It would put it into "limiter" mode and turn on your reverse light on your display. In order to get around this you would need to do some pretty extrensive wiring and relay magic. That wire back feeds into 2 or 3 different areas.

EDIT:
Sorry for the brain fart, Yes you can what you want in a couple different ways.
First; you can put a relay in and wire it as follows.
Terminal Wire
30 Wire going to light pigtail
87a Wire from reverse switch (the other end of the wire for pigtail)
87 Connect to ground
85 12V+ from toggle switch
86 Connect to ground
Toggle switch (ON-OFF SPST)
Terminal A 12V+ from fused source
Terminal B Wire to 85 on relay

Second way
Toggle switch (ON-ON, SPDT)
Common Term Wire to light pigtail to light.
Terminal A (A position) Wire from reverse switch (the other end of the wire for pigtail)
Terminal B (B position) Connect to ground.
This would allow the light to operate as normal when the switch is in the OFF position via the reverse switch. When the switch was turned ON the ground would be constant for the light but would not back feed the rest of the circuit for reverse.

[Mudcon]

where did you hear about using a relay at the rear plug? I have mine straight wired and hooked into the pigtail

[KPC]

Boloiii,

from what I read in your post, your first example would only work if I was using something like a single backup light that was 15 watts.

However, I plan on running a set of 55w lights, so that is likely going to overpower the factory wiring. That means using your first example, I would actually be forced into adding another relay.


So your second example is going to work better, however I want the reverse light (when manually turned on) to only be able to turn on if the key is in the run position.

So here is what I've come up with...

Using 1 SPDT switch & 1 relay.

When switch is in position #1 - contacts A&B will be closed
When switch is in position #2 - contacts B&C will be closed

|---------------|
| A~~B~~C |
|---------------|


Start with connecting contact "B" of the switch, to 85 on the relay.

Then tap into cigarette lighter wire (this only has hot power when the key is in the run position) and run the hot from the cigarette lighter to 86 on the relay. (Note, I mentioned the cigarette lighter because I know it is a key-switched Hot. I'm not sure if the factory Hot light wire, located at the rear of the machine, if it is also a key-switched hot or if it is constant hot. For all I know, the hot wire at the rear of the machine is running off the same circuit as the cigarette lighter hot. I don't know, so that is why I just say for now that I'll get my keyed-hot from the cigarette lighter)

Next, tap into the reverse gear selector switch ground wire (located at rear of machine) and connect this to contact "A" on the switch

Run a constant ground wire to contact "C" on the switch

Run a fused constant hot wire from the battery to 30 on the relay

Run a jumper wire from 87 on the relay to positive wire on rear lights

Connect the other wire on the rear lights to ground (that is if the light housing itself isn't already grounding out the lights)


When ignition key is in the on/run position, the cigarette lighter will have 12+, feeding power to the one side of the relay coil.

With the toggle switch closing "A&B" the relay will not be activated unless the gear shifter is put into reverse.

Flipping the toggle switch to "B&C" will activate the relay regardless if the gear shifter is in reverse or not. However because the switch isolates A&B / B&C, there will be no backfeeding.

I believe I have this right... Thoughts...

[Boloiii]

That will work. Just make sure your power feed is fused. Being you will have about 9-10 amps of draw I would go with a 15 amp fuse, 20 would be fine as well, and run 12ga. wire to reduce voltage drop, especially if using a 20 amp fuse.

I have been thinking of installing a key on high amp relay for stuff just like this. Just a high amp relay that would close with the key switch and then use that to tap off from as an accesory power supply. Just like cars have today.