Project "Jane Doe" 69 Camaro at Best of Show Coachworks

[Gandalf]

Originally Posted by Musclerodz

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.

[Musclerodz]

Originally Posted by Gandalf

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.

[Gandalf]

Originally Posted by Musclerodz

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.

[waynieZ]

Nice neat job, its looking good..