Want to correct my Gauntlet Legends wiring due to some hacks

Nutty 5.0

Active member
Joined
May 17, 2011
Messages
508
Reaction score
26
Location
Pennsylvania
Want to correct my Gauntlet Legends wiring due to some hacks

Picked up this mint game over the weekend. Outside is close enough to perfect for me and the monitor is the best I've personally seen. It functions perfect too but I want to correct the wiring. This is my first real game wiring "un-hacking" and want to fix this right. It looks like they hacked the jamma connector +5 volts on top and bottom (White wires) and, gulp, wire nutted them. I looks like I need to get some molex connectors, pins, and crimper and I assume some extraction tools for this too.

Does anyone know what exactly I need to order to:
1. Fix the white wires completely by removing them (I have a spare working board)
2. Reinstall the proper Molex connectors to be correct and original
3. Any good pics of their unhacked set up?
4. Power is always hot; meaning the power switch at the back is always on. I'd prefer to have it work rather than having to yank out the cord whenever I'm not playing the game.

Thank you to demogo, ctozzi and others who've been super helpful so far. I don't like hacks and what to fix the game up proper.

wiring3.jpg

wiring1.jpg

wiring2.jpg
 
I'm a dumbass. Realized the sticker on the Happ power supply has two on/off switches to what I assume is give the ability to have it always powered up like if you're a switched outlet? Anyway I solved the power on when plugged in.
 
If I recall correctly, there should be 2 9 pin molex plugs coming out of the power supply. These will need to be joined into one large 12 pin molex plug that will mate up with a 12 pin plug in the cabinet that will go into the jamma connector to feed power through there.

So first step is to:

1) Confirm that you have both 9 pin molex plugs coming from the PS
2) Confirm you have a 12 pin molex plug on the cabinet side that feeds into the jamma adapter
3) Look for an adapter plug that joins the 9 pin molex plugs into a 12 pin molex plug that mates with #2

I'll upload some pictures I took when I replaced my GL power supply so you can see what I had and the wires going into the connectors. I'm doing this somewhat from memory but I'm pretty sure I'm correct above.

Having said that, even if you restore the wiring to factory, they did that hack likely because the +5v fingers on the board were burned up so you'll be back to where they were before when it wasn't working. Fixing the fingers/bypassing the burned up fingers is an entirely different problem.
 
Last edited:
I can't upload pictures apparently. That seems to be broken. :(
 
OK, I'm told that the picture uploading problem has been resolved so here it goes:

attachment.php


attachment.php


attachment.php



attachment.php


attachment.php
 

Attachments

  • DSCF2023 (Small).JPG
    DSCF2023 (Small).JPG
    89 KB · Views: 79
  • DSCF2024 (Small).JPG
    DSCF2024 (Small).JPG
    62 KB · Views: 77
  • DSCF2025 (Small).JPG
    DSCF2025 (Small).JPG
    68.5 KB · Views: 78
  • DSCF2026 (Small).JPG
    DSCF2026 (Small).JPG
    94.4 KB · Views: 79
  • DSCF2027 (Small).JPG
    DSCF2027 (Small).JPG
    80.7 KB · Views: 79
attachment.php


attachment.php



attachment.php
 

Attachments

  • DSCF2028 (Small).JPG
    DSCF2028 (Small).JPG
    67.3 KB · Views: 76
  • DSCF2034 (Small).JPG
    DSCF2034 (Small).JPG
    65.6 KB · Views: 75
  • DSCF2038 (Small).JPG
    DSCF2038 (Small).JPG
    68.4 KB · Views: 76
Last edited:
Thanks a bunch! I need to do some work now and find out what molex size and get busy. I'm thinking I shoud find some other molex connector to replace the wire nuts for the 5V+ hack so I can quickly pull out the assembly if need be.
 
Thanks a bunch! I need to do some work now and find out what molex size and get busy. I'm thinking I shoud find some other molex connector to replace the wire nuts for the 5V+ hack so I can quickly pull out the assembly if need be.

I think the connectors are Molex .093 (9 and 12 pins).

I'd need to go confirm though.

edit: no, not exactly -- details below
 
Last edited:
Thanks as always Rob. Whenever you get a chance to confirm would be awesome unless someone else can verify.
 
I know it's overkill, but these guys used to have NOS Gauntlet wiring harnesses offered on eBay. I don't see any listed now, but you may try contacting them to see if they still have any. I think they were like $25, but a kind of high shipping and handling charge. I was thinking of getting one to put my boardset into a cab quickly, but never did actually buy one.

http://www.arcade-service.com/about/
 
I know it's overkill, but these guys used to have NOS Gauntlet wiring harnesses offered on eBay. I don't see any listed now, but you may try contacting them to see if they still have any. I think they were like $25, but a kind of high shipping and handling charge. I was thinking of getting one to put my boardset into a cab quickly, but never did actually buy one.

http://www.arcade-service.com/about/

Thank you very much! This is perfect. I'll see if they do. :)
 
That's just as well. Most of the hacking is on the power supply side of your cables anyway. That shouldn't be that involved to restore it -- just need to confirm that it's .093 molex (which I'll do tonight) then you'll need a wire cutter, wire stripper, .093 pins or sockets, and a crimper and you're good to go -- just need to recrimp each wire and put it in the right place in the molex plugs.

On the wiring harness side I'll need to look at your pictures again to see what if anything has been changed.

BTW, HOLY CRAP, just got a new Das Keyboard in and I swear I can type twice as fast on this!
 
That's just as well. Most of the hacking is on the power supply side of your cables anyway. That shouldn't be that involved to restore it -- just need to confirm that it's .093 molex (which I'll do tonight) then you'll need a wire cutter, wire stripper, .093 pins or sockets, and a crimper and you're good to go -- just need to recrimp each wire and put it in the right place in the molex plugs.

On the wiring harness side I'll need to look at your pictures again to see what if anything has been changed.

BTW, HOLY CRAP, just got a new Das Keyboard in and I swear I can type twice as fast on this!

Fantastic. BTW, I ended up checking voltages on the joystick and it was high. Got it down to 5.20 now. Great idea to check there. Very easy.
 
Fantastic. BTW, I ended up checking voltages on the joystick and it was high. Got it down to 5.20 now. Great idea to check there. Very easy.

Oops. Forgot to check the molex connectors -- I'll do it tonight.

5.20 is still a little high. I'd aim for about 5.05 myself.

And yeah, it's pretty convenient to check but I wouldn't assume that trick works on any other games but this one.
 
OK, good thing I checked. :)

Basically, you need this cable (lucky for you I had a spare one I could snap a picture of easily):

attachment.php


The 4x3 plug is AMP .084. That 4x3 plug is connected to wires which end in two 3x3 .093 molex plugs. So you'll need to deal with both types of connectors and make darned sure you get the wire placement correct. Those .093 3x3 molex plugs mate with connectors that come from the power supply. The .084 4x3 Amp connector mates with its opposite in the wiring harness of the cabinet and then feeds the power into the jamma harness.

Looks like you need to repair the 8 or so wires that were cut from one of your 3x3 Molex plugs. You'll need to make sure that somewhere in your cabinet you still have the mating end to the 4x3 AMP connector. And you'll need to follow the wires from the 4x3 AMP connector on your cabinet side and make sure they go into the jamma harness and if they don't, fix them.

If you want to take clear and close up pictures of the things that I've mentioned above, we can look at what you've got and suggest more.
 

Attachments

  • IMG_0234 (Small).JPG
    IMG_0234 (Small).JPG
    42.5 KB · Views: 21
Last edited:
Oh, your hacked 3x3 molex plug? I have one of those cables too -- it should look like this:

attachment.php
 

Attachments

  • IMG_0235 (Small).JPG
    IMG_0235 (Small).JPG
    46.6 KB · Views: 20
Awesome Rob! Thanks, I'll try and get pics for you tonight or over the weekend. I think I have the power supply Molex ends of these but need to get the extractor tool so I can redo them.
 
Back
Top Bottom