Thread: Location of wiring harness firewall exit holes

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Thanks for the reply. I don't have the power accessories, but do have the EFI setup. I'm concerned with ECU location and harness routing. I think I can route much of the conventional wiring through the frame rails as suggested and be ok there. I had planned to mount the ECU up high under the dash, but am concerned with dirty/noisy interference from other components. I need to research this part of the wiring further before I start mounting stuff. Any suggestions on this would be appreciated.

Originally Posted by Deuce4dad

Thanks for the reply. I don't have the power accessories, but do have the EFI setup. I'm concerned with ECU location and harness routing. I think I can route much of the conventional wiring through the frame rails as suggested and be ok there. I had planned to mount the ECU up high under the dash, but am concerned with dirty/noisy interference from other components. I need to research this part of the wiring further before I start mounting stuff. Any suggestions on this would be appreciated.

My ECU is mounted high, centered under the dash with the harness penetrating below, aligned with the top back of the engine. The only thing they say is to keep it away from an MSD unit, and the main power feed conductor from the battery to the MSD. I'm not running an MSD so no worries.

Originally Posted by Deuce4dad

Thanks for the reply. I don't have the power accessories, but do have the EFI setup. I'm concerned with ECU location and harness routing. I think I can route much of the conventional wiring through the frame rails as suggested and be ok there. I had planned to mount the ECU up high under the dash, but am concerned with dirty/noisy interference from other components. I need to research this part of the wiring further before I start mounting stuff. Any suggestions on this would be appreciated.

I mounted my ECU under the left side of the Dash, and my Fuse Box is on the right side kick panel to isolate them a much as possible-as for RFI, I made certain that my trigger wires didn't run next to constant hots, or, I ran them at 90 degrees to each other if I couldn't-

On my ECU you are supposed to run the main power & ground (in my case I ran 8 AWG) directly to the Battery Posts (they use the Battery as a capacitor), and I ran them down the Trans Tunnel (with Ron Francis "Gray stuff"-I used this on the Driver's side also, to run my trigger wires for my Fuel Pump,, etc.)-

I too, was very concerned about interference, so anywhere that I thought there might be a problem, I used this:
https://www.zippertubing.com/EMI-Shi...ps/Z-Foil.html

hope this helps-