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  #1  
Old 05-09-2020, 10:20 PM
mdud mdud is offline
 
Join Date: Oct 2006
Location: Gilbertville, Iowa
Posts: 8
Default P-lead wire routing

I have a single mag and LSE. I'm running wiring through my firewall penetrations and I have some concern about the routing of the P-lead. I want to keep electrical noise out of engine monitor sensor wiring and the audio. I have a separate firewall penetration for the LSE RG-400 leads to the coils and I am planning on running the P-lead through the same opening. On the inside of the firewall I am not sure I should run the P-lead in the wire bundle routed to the instrument panel or keep it some distance away with a different routing. Any thoughts?
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  #2  
Old 05-10-2020, 12:22 AM
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rjcthree rjcthree is offline
 
Join Date: Jan 2007
Location: Bay Village, OH
Posts: 886
Default Shielded wire?

If you’re running properly shielded wire, you’ll likely be fine regardless of where you run it. Technically there’s little or no current on a p-lead in normal operation, creating little if any field. However, if you can run it away, or run it with high power or otherwise insensitive wiring, it’s lower risk. I ran one firewall penetration with powered stuff and main bus power, and another about six inches away for all the signal wiring FWF. My p-leads were shielded. Another effective practice is if signal and power must cross, route them such that they cross perpendicularly. It might cause the routing to look a little funny/sloppy, but some CAN related vehicle experience has proven it to work really well. Same rules go for audio/radio. YMMV.
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  #3  
Old 05-10-2020, 06:08 AM
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DanH DanH is offline
 
Join Date: Oct 2005
Location: 08A
Posts: 9,500
Default

Flew about 500 hours with two p-leads in the single wiring bundle. No issues with the GRT EIS or the audio.

BTW, no flopping p-leads please.

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Last edited by DanH : 05-10-2020 at 06:11 AM.
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