How to wire a 2 player Jamma wiring harness (unprofessionally)

arcade wiring tutorial, possibly the second most impromptu uncoordinated video I've ever shot
ideal for Pandora, Retro pie and some PC based systems with the Jamma pin out.

[@BeatstreetStudio]

This video was a lifesaver!! Thank you so much for uploading. If i can figure out how to get power to the control panel then I’m all done!

[@Omegaweapon]

No problem! You can use an atx power supply or arcade ones. You just need +5v, +12v and ground

[@markdonnelly1913]

Love your work mate. As always, the information you provide is top notch, even if it is difficult to show with 10 mangled, scarred thumbs!

[@Omegaweapon]

Lol thanks mate, I do try

[@johnTUK]

This is the most useful, and hilarious jamma vid on here!

[@nessat6335]

This is SO COOL... but also took me down a memory lane. My dad used to repair all kinds of electronics, back in the day (1970s and 1980s) in the old country (the USSR, it no longer exists). Must... make... fun... of... self... *fakes a heavy accent and an old lady voice* "Kids these days, with their pretty colorful wires. Back in my day, in the old country, we had the black wire, and if we also had the red wire, we were grateful for the variety!" LOL! (Also, a soldering gun, with soldering wire and some orange stones... that were probably made of rosin? I vaguely remember that most wires were attached and detached with a soldering gun -- whether it's an Atari, or a radio, or a rotary phone... HA! Anyway.) Thanks for the upload! I love how this stuff is both simple and very complex at the same time.

[@Omegaweapon]

In my country we have potato and beets. We make television with only potato and beet

[@nessat6335]

@@Omegaweapon LMAO, nice! This is especially funny cuz you can technically get an electrical charge from beets and potatoes.

[@jananstunes]

You have no idea, I wish this video was around about 8 years ago when I started trying to figure out jamma. I know now but this video will definetly help, you speak in terms everyone can understand . If people don't get it after this, then I don't knownwhat to tell them. Good Job man. Thank you if people don't say it enough. Take care man, from Sacramento Ca.. Cheers

[@GAzcona]

This is really helping me a lot on my first time arcade cabinet build. Thank you Sir!

[@Omegaweapon]

You're welcome. I made these videos to stop people getting ripped off. Also surprisingly, most KZbinrs don't want to tell you everything for some reason. Glad it's helped and good luck!

[@kumite1984]

Hi there, I have a Pandora DX, all wired up to this black harness I think called CHAMMA. The one you are also using in this video. Will I be able to simply plug in an original Jamma board (original pi2Jamma or RGB-PI Jamma for instance) into that black chamma panel? Only have to take care the direction: power vs control side. thank you

[@Omegaweapon]

Yes definitely, it's a standardised system so anything with the Jamma plug will work fine

[@kumite1984]

@@Omegaweapon thanks a lot! great news, so changing Pandora to mamePC wont require me more hardware than JPAC: this jpac will be compatible with my chamma connector.

[@mindfootage]

Best video on the subject. Nice and to the point? I’m going to be using a usb jamma harness for players 3&4, do I still need to worry about the power wire and grounds for p3 and p4?

[@Omegaweapon]

They'll definitely need power and ground. There are 4 player harnesses out there

[@Solentgruen]

The last pre-wired harness I bought had the bundle of ground wires attached to the player 1 wiring

[@jpstanley08]

I really enjoy how you talk like a fun person while dealing with the harness. By the way, would you mind showing us what you do with the video harness going to LCD?

[@michaelmeehan5783]

what do you do when your buttons have 2 neg and 2 pos posts (for light up buttons?)

[@Omegaweapon]

The terminals for the LEDs would be on the outside of the button switch and the terminals on the actual switch would be for the controls

[@rockrollarc9792]

Can you post a link to where to get the jamma harness.... I found one on amazon but it was only for three buttons

[@obsidian295]

i'm a bit late to the party but hey, I'm changing from pc jamma to pandora jamma and on the original harness setup the player grounds were all being fed to main ground on 1+2, aaand so they aren't working. Should i reroute them to the pin 28 ground? Also on the pandora box do the pin 28 grounds loop back / split off to the main grounds 1+2?

[@Omegaweapon]

Hi, on the Pandora jamma, you'll need to wire it to a power supply. +12v for power +5v for the positive button/joystick side, GRND for the let's call it -5v. There should be a black daisy chain on the harness, rush go to your buttons etc but the loop back is the thick black ground wire to the power supply.

[@obsidian295]

@@Omegaweapon legend thanks for the reply. The power is working properly - I already rigged up the power supply but the only button that works is the coin start. I'm using the old harness because I didn't get one with the pandora. it was mostly rigged up the same anyway but all the grounds fed back to the main one with the thick cable (and not/nothing connected to the end pin 28). In this video and on the pinout diagram in the booklet it says ground on end pin 28. I think my button grounds need to go there but I don't wanna nuke it.

[@Omegaweapon]

@@obsidian295 that's weird that only the start button works. Try making sure the only ground you're using is the ground chain. Then again I'm only familiar with the harness in the vid, I don't do jamma much. If you're in Oz I've got a bunch of harnesses here, I'll flick one your way

[@obsidian295]

@@Omegaweapon got it working, i pulled all the wires apart, traced back the button grounds to the harness and for some reason they were going to speaker negative lol. dodgily cut and spliced all the button ground cables together to pin 28 and pin 1/2. everything works. praise the lord. thanks again for your time chief, cheers

[@Omegaweapon]

@@obsidian295 no problemo sir

[@JOHNN01.82]

Thank you best explanation i have seen

[@RESPONSETEAM2]

Hey Abs could you do a vid on how you got started into the building arcade cabinets industry?

[@Omegaweapon]

I think that would be a long boring one lol but I'll touch on it. Hopefully you guys will like my next vid, I'll do the whole process in detail so you can follow along

[@RESPONSETEAM2]

@@Omegaweapon awesome my brother keep up the good work

[@SLEEKiT]

Fucking Ground! 😂 Brilliant video, so funny and actually very helpful man, cheers.

[@tonecossins4490]

Absolute legend was close throwing it in the fucking bin 😂

[@cricboss431]

I have tekken tag card game but nothin now about it pls help how can i conect it and play game pls help

[@kevinthorn9672]

How do you hook up speakers?

[@Omegaweapon]

There's 2 white speaker wires, they're much longer than the rest

[@kevinthorn9672]

@@Omegaweapon what if theres 2 speakers tho?

[@Omegaweapon]

@@kevinthorn9672 they're mono so you'll have to run 2 wires from one speaker to the other. Dunno why they didn't just go stereo

[@kevinthorn9672]

@@Omegaweapon can give me a example how to hook some up to a jamma harness

[@danialhowe9814]

wouldnt it have been easier to upload a pdf to google docs and share it rather than the shaky cam work?

[@Omegaweapon]

It wouldn't be as whimsical and endearing

[@schlesinger29]

Why it’s best to use a super gun this is more hassle

[@jananstunes]

Ehm'fushcal! Bro, I speak Arabic! Props man!

[@Omegaweapon]

Lol Hey my brother, we're all emfashikleen

[@Suyiwireharness]

Looks nice!❤We are a manufacturer for Jamma wiring harness. If you have requirements, feel free to contact me.

[@Adam-rt7lp]

What a mess! I think I will stick with gaming on xbox 360 with a wireless controller