2 step with transbrake wiring
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From: Summerville, SC
2 step with transbrake wiring Do you have to have a separate push button for the transbrake or can you have only the one which is energized when the brake is depressed which is for the 2 step and just splice into that one?
It might be a little complicated trying to use the same button for both, or it might be incredibly easy. Just depends on your specific application, which 2-step and t-brake you have, and how it's wired. It's possible though, just gotta figure out the wiring. I plan on doing this for my car, but that's too far down the road for me to be thinking about in detail right now.
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The switch I have is a swivel type that requires you to hold it down, it's essentially a push button type.
Tell me if this sounds right. Re-wire it so that the 2 step power wire goes to a constant source and splice in the power wire for the transbrake solenoid also and have them grounded to the same place on the same switch having it so when I push the switch down it grounds them out completing the circuit?
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I think this makes more sense after thinking about it. Leave the connections the way they are on the switch, but take the power supply from the brake pedal and move it to a switched 12v supply and splice the transbrake wire to the non-12v wire
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From: Summerville, SC
Alright, I don't know how to do this right. Am I going to have to have two push buttons? This seems like a hassle while trying to stage. I attached the wiring for the 2 step up.
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Verdad Gallardo It looks like the wiring for your transbrake is as simple as can be. It's just a +12V switched with your button.
Unfortunately it looks like your 2-step is armed by a ground which is the exact opposite.
This is a small setback, but it doesn't make it too complicated. It just means that you're going to have to run a relay after the switch for one of the two devices.
I would hook it up so that you have a ground switched by the button, which then splits off and goes into 1) your 2-step to arm it, and 2) triggers a relay which will switch on a +12v wire to activate your transbrake.
Does that make sense or do you need a diagram?
Unfortunately it looks like your 2-step is armed by a ground which is the exact opposite.
This is a small setback, but it doesn't make it too complicated. It just means that you're going to have to run a relay after the switch for one of the two devices.
I would hook it up so that you have a ground switched by the button, which then splits off and goes into 1) your 2-step to arm it, and 2) triggers a relay which will switch on a +12v wire to activate your transbrake.
Does that make sense or do you need a diagram?
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From: Summerville, SC
It looks like the wiring for your transbrake is as simple as can be. It's just a +12V switched with your button.
Unfortunately it looks like your 2-step is armed by a ground which is the exact opposite.
This is a small setback, but it doesn't make it too complicated. It just means that you're going to have to run a relay after the switch for one of the two devices.
I would hook it up so that you have a ground switched by the button, which then splits off and goes into 1) your 2-step to arm it, and 2) triggers a relay which will switch on a +12v wire to activate your transbrake.
Does that make sense or do you need a diagram?
Unfortunately it looks like your 2-step is armed by a ground which is the exact opposite.
This is a small setback, but it doesn't make it too complicated. It just means that you're going to have to run a relay after the switch for one of the two devices.
I would hook it up so that you have a ground switched by the button, which then splits off and goes into 1) your 2-step to arm it, and 2) triggers a relay which will switch on a +12v wire to activate your transbrake.
Does that make sense or do you need a diagram?
It makes sense, but my dumbass needs a diagram
Ok here's what I think will work. Please don't do any wiring until somebody has verified this. I'd feel bad if you fried something because of my mistake.
Again, please wait until somebody confirms this is correct. It's been ages since I've worked with wiring.
The grey box is a standard Bosh-style normally-open relay. Also 87a terminal won't be used since you don't need any "at rest" function.
Again, please wait until somebody confirms this is correct. It's been ages since I've worked with wiring.
The grey box is a standard Bosh-style normally-open relay. Also 87a terminal won't be used since you don't need any "at rest" function.
To me it looks like the two step is a high side switch along with the trans brake so both will need 12v to tune on.
1. If thats the case run ign 12v to the 87 and a jumper wire from 87 to 85. This will put ign power to the hot side of the switched part and the control side of the relay.
2. Then run wires to both the switch wire for the two step and the wire from the t brake to 30.
3. Then run wires from 86 to the push button you have and then to a rocker switch that is ran to ground.
Doing it this way will allow you to flip the rocker switch then hit the button for both the trans brake and the two step to come on. It will also only allow the trans brake to work if the rocker switch is on that way the brake can not tune on when driving if the push button is bumped.
1. If thats the case run ign 12v to the 87 and a jumper wire from 87 to 85. This will put ign power to the hot side of the switched part and the control side of the relay.
2. Then run wires to both the switch wire for the two step and the wire from the t brake to 30.
3. Then run wires from 86 to the push button you have and then to a rocker switch that is ran to ground.
Doing it this way will allow you to flip the rocker switch then hit the button for both the trans brake and the two step to come on. It will also only allow the trans brake to work if the rocker switch is on that way the brake can not tune on when driving if the push button is bumped.
Are you sure the 2-step has a +12v trigger?
From the PDF he posted it looked like it was triggered by ground, which is why I wired it up like that with a relay. If they're both +12v you won't even need a relay. (unless the 2-step requires more than 30 amps or so)
From the PDF he posted it looked like it was triggered by ground, which is why I wired it up like that with a relay. If they're both +12v you won't even need a relay. (unless the 2-step requires more than 30 amps or so)
To me it looked like the ground is not switched and he said he was getting power from the foot brake switch. So I was thinking it was a switched power and not ground but I could be wrong. I always use a relay for things like this because most switches I use are low amp.
Last edited by 95lt1z383; Nov 22, 2009 at 02:54 AM.
If you look at the PDF he posted, there are two separate buttons, one for the tbrake and one for the 2-step. The t-brake button is clearly just a simple switched +12v, but the button for the 2-step appears to be a switched ground. I could be wrong, but that's sure what it looks like to me. So to combine both button functions into one button you would need a relay to get the right polarity to the t-brake.
Most switches are 30 amps that I've seen, should be more than enough for a simple trigger wire.
Most switches are 30 amps that I've seen, should be more than enough for a simple trigger wire.
After looking at it more I think you are right. If the ign 12v input is the power for the two step I would think you could wire it the way I posted and just connect the wires for the other switch. That way as soon as the 2 step box is power up the 2 step will come on. But the way you said to wire it should work. Sorry for the brain fart.
Last edited by 95lt1z383; Nov 22, 2009 at 03:47 AM.
yep, although that's a slightly simpler relay than the one I posted a diagram of, it's actually the same thing it just doesn't have an "at rest" terminal (87a).
85 and 86 are your trigger circuit, and 30 and 87 are your switched circuit, so just wire it the exact same way as my diagram, just disregard the lack of the 87a terminal
85 and 86 are your trigger circuit, and 30 and 87 are your switched circuit, so just wire it the exact same way as my diagram, just disregard the lack of the 87a terminal