Fused, Powered, Relayed Harness
 

My wiring harness is atrocious. The relays, fuse box, grounds, etc. Works but is a complete mess. I'm trying to look for a solution. I only have four devices powered: Haltech, fuel pump, ignition, and injectors but I may want or need more in the future.

I was thinking about a Painless harness but they seem to be excessively expensive. What do you guys think I should do?

Check out ezwiring.com, much cheaper than painless

Like Aaron Cake says, it would be universally wrong for every application. OTOH, a fuse panel from another car just might do the trick in a clever, ingenious manner while being exceedingly cheap at your local junkyard. My Project OldTree actually uses the dashboard fuse/relay panel out of a Mk4 Jetta. I chose this one because it utilizes Volkswagen's modular sockets. The main panel has 13 openings and five external fuse holder attachment points. Depending on how you want to go about your harness, this may or may not work optimally for you. Another option is the Mk3 Jetta's fuse/relay panel. It has 12 relay sockets and 22 ATO/ATC fuse sockets, but might be a bit more difficult to create a pinout schematic than the Mk4 panel.

The neat thing about the Mk4 one is that it's basically just a frame with a bunch of snap-in relay sockets. This is the modern system the VW uses on everything now to save money. The fuse holder points accept the ATO type holders as well as the larger Maxi fuse holders too. Should you need even more fuse sockets, you can substitute a relay socket for a triple ATO fuse socket from the T5 Transporter van. Thanks to its Lego-like architecture, you can customize it to your heart's content with very little difficulty. And the best part is that VW only uses 4 kinds of terminals, three being VW-specific and the remaining one (for relay coil pins only) being the same ones from Tyco Electronics found in every Haltech harness.

Should you need a different number of relay openings, they make quite a few different frames too. Take a stroll through the VW section at your local junkyard and you'll see just how flexible the system really is.

Other than that, a decent set of terminal extraction tools will pay for itself the first time you use it.

Something like this?

http://www.ebay.com/itm/Relay-Fuse-Panel-Board-00-05-VW-Jetta-Golf-GTI-Beetle-Audi-TT-8L0-941-822/350492299818?rt=nc&_trksid=p2047675.m1851&_trkparms=aid%3D222002%26algo%3DSIC.FIT%26ao%3D1%26asc%3D261%26meid%3D3659212270459277081%26pid%3D100005%26prg%3D1088%26rk%3D2%26rkt%3D5%26sd%3D181286283162%26

That is the lower half of the Mk4 Jetta relay panel, which works surprizingly well to control a 2-speed Taurus Fan like the volvo fan controller does.

The one I think would be most germain to your build is the upper half of the panel, shown here with a few of the sockets already in place:
http://www.ebay.com/itm/MK4-A4-Jetta-Upper-Relay-Panel-Box-with-Wiring-Pigtail-OEM-LKQ-99-05-Electrical-/181100321686?pt=Car_Audio_Video&hash=item2a2a6b9b96&vxp=mtr