Misaligned brake switch

[SmartDrug]

Freaking swiss, I just wanted to see how you wired it all in. Have a good one, honey.

 

[frauhansen]

so you need a diagram of how to wire a relay?
That's the reason for my warning in the last sentence. You should know your limits.



10sek google

 

[SmartDrug]

I understand how relays work. What I was looking for was where you tucked the wiring, how you deleted the second switch, whether it was removed completely or left in place and bypassed, whether it looked like it would survive being submerged, etc. Whether swiss wiring had an extra neutral to stay out of wars. There are literally dozens of reasons why someone would be curious to see this setup and to have a picture saved for the hivemind of the HMMWV community, you could have just said, no.

 

[frauhansen]

Quite simple... the excitation circuit of the relay is connected to the output of the brake light switch.
To do this, simply make two cables which ideally have the military sockets. A special crimping tool is required for this.
On the switching side of the relay, another cable is then connected to the plugs removed from the gearbox switch using the military plugs/sockets.
This means that everything remains original on the vehicle side and no cables need to be cut.
Simply hide the whole thing underneath the dash.

But I'll be in the workshop tomorrow anyway, so I can provide you with pictures and a wiring diagram. I can't remember whether the gearbox signal was switched to ON or OFF. So normally closed or normally open.

 

[SmartDrug]

So you left the other switch in place, is the arm attached to it or was it uncoupled?

What terminals did you use to attach the Packards to the relay? Did you use a waterproof relay socket and feed into them?

Again, there are dozens of things that you can learn from a picture that go beyond how a relay works.

 

[frauhansen]

Now it somehow becomes a question of principle
Does a picture say what you should think about depending on your requirements?
Do I take a watertight relay? Can I see the picture? Rather no. Is that relevant depending on the intended use? Yes.
Have I left the old switch in? What does it matter, it's not working now. But yes, I have. Why dismantle it?
Which terminals did I use? The ones that belong on the relay on the relay side. That depends on the relay used. And on the vehicle side the corresponding military counterpart. (I don't know what they are called)

Please don't hold it against me, it's now 01:30am here. And there is time on your side to have your own thoughts.

 

[Milcommoguy]

Now it somehow becomes a question of principle
Does a picture say what you should think about depending on your requirements?
Do I take a watertight relay? Can I see the picture? Rather no. Is that relevant depending on the intended use? Yes.
Have I left the old switch in? What does it matter, it's not working now. But yes, I have. Why dismantle it?
Which terminals did I use? The ones that belong on the relay on the relay side. That depends on the relay used. And on the vehicle side the corresponding military counterpart. (I don't know what they are called)

Please don't hold it against me, it's now 01:30am here. And there is time on your side to have your own thoughts.

Ding Ding Ding.... Back to your corners. Time out............

I don't see the drawing showing the transmission TC circuit with the normally closed contacts for the #810A & 810B wires, the little round plug associated with the TC switch left side of the failing or troubled switch to align. Labels are a bit confusing too. Pretty colors.

Relay coil would be... one side to ground and the other to 74B. Look closely for it on the right side of dual switch. Stated this my post above 15 & 16

Sooo... Pin 85 to tap HumV wire 74B located on switch.
Pin 86 to ground. A good one.
Pin 87 to TC connector wire 810A
Pin 30 to TC connector wire 810B


BE SURE to have a 24 volt unit / COIL

This is my interpretation of the thread with funky stop and TC disengagements. If I misunderstood the problem.... I will take a time-out... OR this might just be the next Camotek product.

I ate my crayon for lunch, CAMO

 

[SmartDrug]

A lot of it is curiosity, seeing how other people build things, especially when it comes to something like the HMMWV that can be configured and modified into such different forms. Our M1123s are less than 1k SNs apart and look nothing alike now, words don’t convey those differences the same way as pictures. To a degree, it’s what makes this HMMWV community possible, a forum where people can show what they’ve done and demonstrate how they did it. There aren’t many that still exist. It’s why the loss of all the other car/bike/enthusiast forums of the early 2000s is such a loss. In 2014 or so Photobucket started charging for photo hosting, this killed millions of man-hours of work and information for these various communities. Years of experience and knowledge lost to time. There is value in pictures.

FWIW, it was 1am for me, too- I left Lausanne this morning.

 

[frauhansen]

Ding Ding Ding.... Back to your corners. Time out............

Yes, sir!

So, I took a look underneath and took a few pictures for you.

And I thought again about why I still don't think it's a good idea.
Pictures of something that you're recreating mechanically? Okay, that works.
Pictures of electrical things? Not so much.

Because when it comes to the electrical system on the HMMWV, you have to understand what you're doing. In other words, you have to understand the system you're building. If you just try to plug the exact same cables into the exact same places based on pictures without knowing WHAT you're actually doing, it can quickly become expensive.

So grab a multimeter. Measure which switch supplies the brake light and which supplies the transmission signal. Combine this with knowledge of how a relay works, and you have everything you need.
Then neatly connect everything to the existing wiring harness, and you're done.

And as a side effect, you'll also know exactly when your brake lights are on... because you'll hear a soft click.

 

[SmartDrug]

Yes, sir!

So, I took a look underneath and took a few pictures for you.
View attachment 951400View attachment 951401View attachment 951402
And I thought again about why I still don't think it's a good idea.
Pictures of something that you're recreating mechanically? Okay, that works.
Pictures of electrical things? Not so much.

Because when it comes to the electrical system on the HMMWV, you have to understand what you're doing. In other words, you have to understand the system you're building. If you just try to plug the exact same cables into the exact same places based on pictures without knowing WHAT you're actually doing, it can quickly become expensive.

So grab a multimeter. Measure which switch supplies the brake light and which supplies the transmission signal. Combine this with knowledge of how a relay works, and you have everything you need.
Then neatly connect everything to the existing wiring harness, and you're done.

And as a side effect, you'll also know exactly when your brake lights are on... because you'll hear a soft click.

I respectfully disagree. There’s still value in being able to visualize what someone has done. Benefits for both side, in this case I’d point out that your terminals are too exposed and likely to corrode. I agree that you need a fundamental understanding of the systems you’re wrenching on, but the pictures don’t distract from that. Also worth a note, most people don’t like being spoken to like a petulant child when requesting information or expressing curiosity about something you bothered to post. If you didn’t want to take pictures, again, you could have just said no.

 

[frauhansen]

if you like to go swimming with your truck, in this case you have to use some other terminals. But you would have done that anyway. With or without my picture