M923 reverse lights install

[Suprman]

Hi all I am in the process of installing reverse lights in my 923. I got the allison reverse pressure switch part 29503665. On the passenger side of the trans there is a port for the switch there is a bolt in its place. When the bolt is removed with the vehicle cold no fluid came out and the switch just screwed in by hand and I snugged it up with a wrench. I ran a wire up into the cab you can see a red arrow pointing to it in one of the pics. I have a 20amp solid state dc control relay and I bought a sealed plastic box I am going to mount it under the dash. I put the truck in reverse and verified with a meter that the switch is functioning properly. I installed 2 led flood lights in the back all I have left to do is run a wire up to the cab from the lights and find power somewhere. If someone knows a good place to grab 24 volts under the hood preferrably please let me know. I am also putting a switch in the cab so I can put the lights on manually.

 

[juanprado]

You can grab power by using a military Y on one the 2 circuit breakers next to the pcb box.

 

[Vintage iron]

Extra light comes in handy when backing up at night. I am not sure I would want the to come on every time. I know I had to reposition my truck at the Weare Rally and I think people would not have been to happy with flood lights in their tents. A switch in the cab maybe a good idea?

 

[Suprman]

I was going to try and tap off the blinker circuit for the relay activation voltage so unless the driving lights are on they would not come on

 

[jw4x4]

I wired my backup alarm to the pressure switch I installed in the trans, and put a switch in the dash so I could negate the alarm when desired. My rear facing LED work/reverse lights are wired to another switch in the dash. I don't want to have to put it in reverse to have the LED's come on.

 

[kennys@wi.rr.com]

That pressure switch looks a lot like an deuce break light switch. Any idea if they are similar at all?

 

[timntrucks]

that might be what i need to do once i get all the bugs worked out. thanks for sharing

 

[srodocker]

Thanks for the switch part #. I have lights and even a backup alarm. Will also have a toggle for times where they are both not needed.

 

[dawico]

I need to do this too. Thanks.

 

[jw4x4]

That pressure switch looks a lot like an deuce break light switch. Any idea if they are similar at all?

Yes they are identical switches.

 

[crolfe1984]

Might anyone have a picture or a bit more direct advice on where to grab the 24v power source? I'm doing an install on some reverse lights today. I've got my switch panel rigged up and the rear lights should go on no problem... I just need a good power source!

Also curious as to what gauge wire you used.

 

[Suprman]

You can grab 24v off either pair of batteries get a ring connector and go to one of the batt terminals. I would advise a fuse inline. I prefer to use the pressure switch in the transmission with a relay in the battery box.

 

[Coffey1]

Lights to switch installedl on batt box then to batt with inline fuse is the way I did mine .
Did not want them coming on in reverse because I also can use them as work lights

 

[Suprman]

With the relay in place I used the pressure switch to give the relay a ground for activation and I have a dash switch that turns on my rear floods and it also activates the relay.

 

[Ironbrothers]

I've been searching these light hookup install threads and havent figured out yet how you can hook these to the batteries. Any combination I seem to try sends sparks flying. Is anyone able to explain which terminals to use on the 4 batteries? I am just learning a 24v system and I dont want to hurt anything but I need lights for my states inspection.
Thanks guys, I am learning a lot on Steel Soldiers!

 

[77 AMG]

I pulled power off of the B/O Marker at the tail lights, since I ALWAYS have the "normal" lights on when it is being driven. Simple habit to get into when needed.

 

[Jbulach]

Yes they are identical switches.

Yes they are identical switches.

Has anyone used the $19 Deuce brake switch, that can verify it works instead of the $50 Allison switch that Will used?

 

[kendelrio]

You can also pull power off of pin 16 on your dimmer switch. That will provide power when your service drive lights are on. Use a "Y" adapter to connect the aux light power to main power and switch.