Thanks for the compliment. I had intended to re-pupose those switches and had even added an Infinity push-start engine button to the mix. But hold that thought - things get even more interesting with the dash later on.....

With the Gen4 Vintage Air mounted under the dash, it's time for some wiring.

Some of the ISIS components.
http://www.smugmug.com/photos/1175051183_ExKMH-M.jpg

The SpearTech engine harness, E38 PCM and Vette DBW pedal. This harness came fully labeled, complete with fuseblock and separate labelled diagrams specific to my harness. I had John make the harness so I could locate the PCM inside the car, add a second OBD2 connector to pull some data for the dash and also added some lines for me to route to the Corvette cluster. I have to note that John was one of thee most helpful vendors during this build. He never quits being available for questions and followup. Thanks John!

http://www.smugmug.com/photos/1175048673_gbRRe-M-1.jpg

With the tunnel and firewall now modified, I re-mounted the PCM, re-installed the Speartech engine harness and fuse block. I modified the ISIS mount that Chris had originally come up with. The SpearTech fuses and the ISIS system (the MasterCell and 1 PowerCell) will be hidden under the dash and be accessible by dropping down the glove compartment door. I started wiring the C6 column into ISIS which was a breeze with the ground-switched inputs and 22ga wire.

http://www.smugmug.com/photos/i-3LZM...-3LZMb4W-M.jpg

I had seen the Corvette guys switching over to these Braille batteries and at 17lb it was hard not to at least try one. The small size and bracket that would fit nicely in the side recess of the trunk could work well. I plan to add a C-Tek maintainer with an external connection. The grey of the battery would later be changed to black and the aluminum bracket that was anodized did not come out as nice as I had hoped so that will be powdercoated.

http://www.smugmug.com/photos/i-8kwz...-8kwzbRh-S.jpg

I ran the battery cables from the passenger footwell to the trunk alongside the ISIS power and a few lines I ran separate from ISIS. I ran these through the rear side panel using a large grommet obtained from John @ SpearTech.

http://www.smugmug.com/photos/i-WFqc...-WFqcPGp-M.jpg

I designed a removable aluminum panel to mount behind the rear seat to try and help keep any noise down. I neglected to get a photo of the final product so you get to see the cardboard mockup lol. We later covered the aluminum piece with Dynamat.

http://www.smugmug.com/photos/i-9Hj5...-9Hj5BqB-M.jpg

My 2nd PowerCell and InMotion Cell are mounted in the trunk along with all of the main ISIS power fuse blocks. If I could have found a tidy way to mount a cell in the engine compartment somewhere, I’d have done that and just run the few rear lighting circuits back to the trunk. That would have been more efficient for the individual circuits (lights, fans etc) but with the battery in the trunk you have to think about where you are going to route your power to each cell AND where to mount the main fuse blocks. Planning ahead makes all the difference with the ISIS system and it worked out well here. Here’s the mock-up of the rear ISIS modules mounted vertically in the forward trunk area while I wired everything and made sure everything would work as intended. The module on the left is the inMotion cell for door locks and windows. To the right is the second PowerCell.

http://www.smugmug.com/photos/i-vcp7...-vcp73pf-M.jpg

Very nice job on the wiring so far.:thumbsup: :thumbsup:

looks great, however i would be careful putting voltage wires next to data cables (ISIS interconnect data cables) as they could interfere with the signal. same on the engine harness especially around ignition wiring.

Thanks but I think of it this way (being an IT guy): ISIS uses a CAN bus system so it likely has some redundancy in the protocol (aside from the physical redundancy in the pairs). That means if something get's f'd up along the way and ISIS doesn't understand, it's going to ask for it to be resent.

I had similar thoughts regarding the SpearTech harness but then you have to think - well they all run into one common bundle right next to each other eventually anyhow and how many LS harnesses are out there?

I also ran each set of cables inside it's own wrap and they were laid parallel - albeit that does not provide any actual "sheild" per se but it can't hurt.

Add all that to the fact I grounded each component at multiple points so that should help to keep any "noise" down.

Let me know what you think - this stuff interests me and I spent a LOT of time thinking through the routing of the wiring.

G.

sounds like you are on top of it and that is good. I don't know if signal noise is seen as an open circuit to set off the malfunction light. It knows and sees the connection, it just can't transmit a clear operation signal. I have seen electricity do weird things. I always try to be cautious on routing, better to know its good than hope.

Completely understand. That's the nice part of the SpearTech engine harness being self-contained and almost entirely separate from the ISIS system and being constrained to the under-hood and dash part of the car. There are a couple of exceptions like I run the Fuel pump and 2x fan signals from the PCM into ISIS and have ISIS take care of it from there. Those signals come out of the PCM intended for relays anyways. The remainder is all bundled-up inside the SpearTech harness, none of which runs the length of the car.

G.

Nice neat job, its looking good..