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Old Nov 28, 2007 | 11:06 AM
  #1  
NJF350SD's Avatar
NJF350SD
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From: North NJ
Aftermarket wiring

Hi all,
In preparation for my new truck's arrival ('08 F350 SD), I am getting ready to create an additonal wiring harness to support the aftermarket lighting I will be adding (back-up lights, bed lights, work lights, etc.).

The question I have is; where is the best place to get wires from inside the cab outside? I will have the following in a wire loom:

1. Antenna Cable
2. 3 - Relay Triggers
3. 1 - Power lead cable for bed lights

I am looking for an existing grommet or usable hole. I really do not want to drill a custom hole.

Thanks,
 
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Old Nov 28, 2007 | 01:01 PM
  #2  
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sofdchief
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From: South Onondaga, NY
wiring

Well, I can't speak exactly to the '08, as I have not worked on one yet, but all the SD's I have done aftermarket wiring on ('00-'06) have pre-existing grommeted holes in the firewall somewhere above the the pedals (usually a little to the left of the pedals as your sitting in it). These are usually the best way to access power and/or front end electrical accessories. If your running from cab interior to the rear end of the truck, there is usually at least one grommeted hole in the rear wall as well. sometimes pass side, sometimes driver side, sometimes both. I have used these as well.

Hope that answers your question!
 
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Old Nov 28, 2007 | 01:03 PM
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texastech_diesel
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Theres a grommet on the back of the cab (DS) behind the back seat somewhere in the neighborhood of the big oval grommet in the bed. It's small, but with a bit of work with a round file I got a CB coax connector through it.
 
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Old Nov 28, 2007 | 01:28 PM
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Thanks All!! Very helpful.
 
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Old Dec 28, 2007 | 08:06 AM
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SirHailstone
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Is there a hole near where a clutch would be on a Super Duty? (yes, its an automatic)

I'd like to run some 2/0 wires through there to power an inverter.
 
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Old Dec 28, 2007 | 08:16 AM
  #6  
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WildWildWest
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From: Saskatoon, SK, CA
Originally Posted by SirHailstone
Is there a hole near where a clutch would be on a Super Duty? (yes, its an automatic)

I'd like to run some 2/0 wires through there to power an inverter.
There is a really big hole there on the automatics - it is covered by the "clutch delete patch" which is the cheapest flimsiest way to cover a hole i have ever seen. I replaced mine due to a rip and then when I fitted the sound insulation back over it on the inside, the new one tore again. So when I needed to pass through some heavy gauge wires I just punched them through the cheap patch and used the handyman's secret weapon to seal it up in the engine compartment (Duct Tape!!). Duct tape works much better to reseal the hole you make in it and it is about 200 times stronger than the patch they sell at the dealership for $15 that lasted a whopping 30 seconds when I installed it.
 
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