I'm relocating the fuse box on the driverside front fender, and am wondering about the little diagnostic box that sits in that area. I have an aftermarkt ECU, so can I just snip the wires to that?

 

The only thing the diag box is good for is jumpering the fuel pump and ground wires to run the fuel pump to test the fuel system. I would be careful with removing it, there is 12v, ground, and signal wires all in there, if they short together you'd have some bad news.

Dale

 

if you need help figuring out where the wires lead to gimme a call... i have everything unwrap and the diag box is pretty simple

 

I would just keep the diagnostic box, you really arent gaining much getting rid of it and its not too many wires to extend or hide with the fuse box.