[Tuned335i]

I'm concerned about the ground wire to my piggyback ECU (which currently travels out of the ECU box, under the cover, and attaches to the ground on the strut tower) being eventualy cut by the ECU box cover.

Does anyone have additional information on the ground source inside the ECU box? Eugen mentioned before that there is a black screw inside the ECU box, but I could only find two silver torx screws, neither of which has continuity to ground. If anyone has photos of the ECU box ground source or can describe where it is, please post them. I would really like to get the ground inside the ECU box.

Cheers!!

[satinghostrider]

Originally Posted by Tuned335i

I'm concerned about the ground wire to my piggyback ECU (which currently travels out of the ECU box, under the cover, and attaches to the ground on the strut tower) being eventualy cut by the ECU box cover.

Does anyone have additional information on the ground source inside the ECU box? Eugen mentioned before that there is a black screw inside the ECU box, but I could only find two silver torx screws, neither of which has continuity to ground. If anyone has photos of the ECU box ground source or can describe where it is, please post them. I would really like to get the ground inside the ECU box.

Cheers!!

I always had that in my mind actually as the wires doesnt really look too weather resistant. With intermittent heat and cold, i am worried the wire may degrade over time. Its just another way of completely making the procede robust. I hope shiv can develop something or a way to keep the wire in the box or advise us on some form of insulation we can use to protect that particular wire.

[Moggie]

Originally Posted by Tuned335i

Does anyone have additional information on the ground source inside the ECU box? Eugen mentioned before that there is a black screw inside the ECU box, but I could only find two silver torx screws, neither of which has continuity to ground. If anyone has photos of the ECU box ground source or can describe where it is, please post them. I would really like to get the ground inside the ECU box.

Cheers!!

I couldn't find a grounded source in the ECU either so I just turned the eyelet connector into spade and ran an extension through the hole in the back of the ECU box into the interior (there's a torx screw to the left of the fusebox). If you are running a USB cable anyway...

[ontopofm]

i was thinking the same thing. Running the ground to the bolt behind the glove box where i hardwired the V1. So you cut the eyelet connector into spade? Where did you get the extension cable at?

[Moggie]

All new connectors... cut the eyelet off, crimped on a new spade and made an extension female spade to eyelet myself.

[Tuned335i]

Boy do I feel stupid...I don't know why I didn't think of that!!!! I have been reading the DIY on getting the serial-to-USB cable through to the glovebox, and while I'm in there, I will just run the ground into the fusebox area and conect it to the torx screw others have used to ground their V1 installs! Piece of cake!! Pinched ground wire solved!!! Thanks guys!

BTW, I just ordered my serial-to-USB extension cable same as called out in the PROcede USB Cable DIY. It's only $9.99 at Newegg.com.

Here is the link to the actual cable on Newegg.com

[ontopofm]

i just ran the same usb cable to the glove box yesterday, works perfect with v2

[Tuned335i]

Just a quick question on wire gauge sizes. I don't think I have exactly the same wire gauge size as the PROcede ground wire, but I do know it's bigger than the proceed wire (lower gauge). As long as I use a wire gauge that is lower (thicker) than the PROcede ground I'm ok, right?

[Tuned335i]

Update:

I hope you guys who are thinking of running the ground wire through the hole with your USB cable to the fuse box have better luck than I did. The reason I say this is because it doesn't work for me.

The PROcede works fine with the ground wire connected to the original V1 install location on the strut tower. I connected a wire to the big torx screw in the fusebox and checked continuity with the original ground wire location and it's good. But when I connected the fuse box ground wire to the PROcede, the car threw all kinds of warnings.

So, I just gave up on the hidden ground wire. If you guys have a different experience when you try it, please post. But I thought I would save some people the grief of what I went though the last 24 hours trying to get it to work.

Apparently, at least in my case, a "ground" is not necessarily a "ground" in all circumstances...

UPDATE: Moggie says use a serrated washer at the torx screw and it should work fine, because it does for him. I will try his suggestion next week. I'm sick of messing with the ECU box right now LOL!!!