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Grommets In Firewall (Useful for Installations)

Andyw2100

Well-Known Member
Oct 22, 2014
6,542
2,393
Ithaca, NY
I had my front camera switch and radar detector re-installed today, by Steve from Syracuse Customs, after the original installer did a lousy job, damaging my wiring harness and resulting in it needing to be replaced, to the tune of $1850. Needless to say, I wanted to make extra certain that everything was done correctly this time.

I couldn't be happier with the work Steve did. I am posting because he found two plastic grommets in the firewall that I have not seen anyone post about previously. He ran the cable for the front camera switch and two radar detector cables through a hole he cut in this plastic grommet, which he then sealed up. A picture of the grommet, with the cables already through it, is below.

Grommet.jpg



There are two of these grommets, one near the top left corner and one near the top right corner of the firewall. The one near the top right corner (as you face the car) is basically behind and below the washer fluid reservoir, and perhaps a bit to the right of it. That's the one pictured above.

I know people have talked about cutting holes through the firewall, so perhaps some will find this post useful, as cutting a hole through a grommet seems simpler, and far less damaging to the car than cutting a hole through the firewall.
 

Fezzik

P100D, M3LR
Nov 6, 2014
554
60
Lincolnshire, IL
That has been posted. There is a sealed gromet for people without sunroofs and is perfect for running wire. If you have a sunroof this is where the drain for it will go. I enlarged mine to fit wires and hose with a special gromet
 

Andyw2100

Well-Known Member
Oct 22, 2014
6,542
2,393
Ithaca, NY
That has been posted. There is a sealed gromet for people without sunroofs and is perfect for running wire. If you have a sunroof this is where the drain for it will go. I enlarged mine to fit wires and hose with a special gromet

I must have missed it.

I do not have a sunroof, so that makes sense.

Thanks!
 

Cyclone

Cyclonic Member ((.oO))
Jan 12, 2015
5,056
1,141
Charlotte, NC
I must have missed it.

I do not have a sunroof, so that makes sense.

Thanks!

Darn. I was hoping this might open up the change of getting an aftermarket subwoofer because I don't want to drill through the firewall, but I have a sunroof.

Andy, why does he need to get though the firewall though? Wouldn't dual dashcams be strictly an "inside the cabin" affair?
 

Andyw2100

Well-Known Member
Oct 22, 2014
6,542
2,393
Ithaca, NY
Darn. I was hoping this might open up the change of getting an aftermarket subwoofer because I don't want to drill through the firewall, but I have a sunroof.

Andy, why does he need to get though the firewall though? Wouldn't dual dashcams be strictly an "inside the cabin" affair?

This wasn't for the dashcams.

The front camera switch was an artsci project that was quite popular.

Front-rear camera touchscreen parking protection switch kit reservations


It allows for a Tesla rear camera to be mounted at the front of the car, and the display can come up on the 17" screen, alternating with the rear camera display as needed. It was the cable from that camera that had to be run through the firewall. The installation guide for the switch suggests that the cable come in another way. A poor implementation of that resulted in water intrusion, and me needing my wiring harness replaced.
 

Cyclone

Cyclonic Member ((.oO))
Jan 12, 2015
5,056
1,141
Charlotte, NC
Oh the front camera project. I found that to be a very valuable item and wish I had it. I'm surprised Tesla hasn't incorporated that into its designs. I can imagine it makes parking nose-in much easier.
 

Andyw2100

Well-Known Member
Oct 22, 2014
6,542
2,393
Ithaca, NY
Oh the front camera project. I found that to be a very valuable item and wish I had it. I'm surprised Tesla hasn't incorporated that into its designs. I can imagine it makes parking nose-in much easier.

It does.

There still seem to be some floating around, from people who never installed them. (A month or two ago I noticed a couple of people offer one up for sale. It may have been in the thread I linked to above. I'll see if I can find the posts, and PM you.)
 

cinergi

Active Member
Sep 17, 2010
2,176
40
MA
Anyone have recommendations on how to get 2 4 AWG conductors (or bigger) into the front passenger area from the 12V battery (newer VIN)? I have a 600 watt inverter I've been meaning to install ... (I'll also need to ground it with #8)
 

cinergi

Active Member
Sep 17, 2010
2,176
40
MA
Through the same area but use a different gromet. Search for a tread I made about laser, radar install

Thanks! I just took things apart to get at that area (and dropped a bolt on top of the traction pack somewhere :cursing:) to check it out. There's a hole and grommet there but interestingly nothing running into it (and I have the sunroof). When I have more time I'll run the wiring I need. Tying into the system will be the next challenge. I especially wonder what will happen if I have to disconnect the battery to make my connection (will the car shut down and not recover without Tesla getting involved?) ...
 

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