Running wires

[4runnerAzGuy]

I have a bunch of stuff in my garage for me to install. How do you guys run your wiring through the firewall? With my old suburbans I just drilled through the firewall with a hold saw lol but I want something a little nicer for the 4runner.
I need to run wiring for lights, cb, etc..

 

[having fun]

Look at the rubber grommets for the factory wiring going through the wall. They have reserved tits on some spots to cut and run wires.

That's what I have done.

 

[4runnerAzGuy]

Look at the rubber grommets for the factory wiring going through the wall. They have reserved tits on some spots to cut and run wires.

That's what I have done.

Perfect, I'll try and use those then. Thanks

 

[Altoidfishfins]

Yes that works well. You shouldn't have to drill holes. I ran wiring up to a relay under the hood from the driver's side through the grommet for a Travel Trailer battery charging system recently.

Also, I ran coax cable for a two way radio to an on-glass mounted antenna through the left side passenger door. It was easier than I thought it would be. The coax routed easily through the rubber channel between the pillar and the door and there was plenty of space to route it from there into the driver's side floor trim and into the cab. Never had to drill a hole.

 

[MikeInNH]

If you can't find the factory grommets or their inaccessible...you can buy wiring grommets from almost any auto parts store. Then drill a hole like you use to do...and use the new grommet. When you buy the grommet make sure they tell you the size of the hole you'll have to drill.

 

[HokieRunner]

Firewall wire routing

Daystar also makes a 'firewall boot'. They're really nice if you're adding a lot of aftermarket wires as it keeps them all neat, tidy, and it's a fairly OEM looking part. Just drill a hole and install it. Then cut the grommet (it's stepped with different size openings), run the wires and zip tie/seal off. Really easy to add more wires later as well.

Otherwise, as others have said there is a good amount of room using OEM grommets.

Daystar Firewall Boot

 

[97BlackAckCL]

Yep, I just poked a hole in the rubber grommet and fished my wires right through.

 

[Powder_Hound]

Reviving an oldish thread, but I'm getting ready to run 1/8 coax through firewall. However, everywhere I look and read about going through the grommet that the electrical loom runs through. Is there any reason I shouldn't run through either of the 2 holes pictured below. My sat antenna runs through this opening on drivers side and in image 2 it shows the hole on passenger side, but it is plugged. This plug is easily removable. It seems to me this would be a much simpler option...unless there is a reason not too.

Thoughts?

 

[Bumbo]

I would probably use the main existing grommet, but the only problem I can see there is potential interference.

I have my rear antenna running parallel with my ARB fridge power to the rear of the truck and sometimes my VHF ham radio squelch opens up when the fridge is running.

It can be a bit annoying depending if you are operating on stuff that isn't TSQL or DCS.

 

[Powder_Hound]

I would probably use the main existing grommet, but the only problem I can see there is potential interference.

I have my rear antenna running parallel with my ARB fridge power to the rear of the truck and sometimes my VHF ham radio squelch opens up when the fridge is running.

It can be a bit annoying depending if you are operating on stuff that isn't TSQL or DCS.

Thanks, but why would you recommend using the main existing grommet VS. using an existing hole with a satellite antenna wire or no wires at all?

 

[Bumbo]

Thanks, but why would you recommend using the main existing grommet VS. using an existing hole with a satellite antenna wire or no wires at all?

Because its very easy and accessible to get wires in/out of that big grommet... its also a very popular location, lots of people use it.

It just depends on what you are trying to do... You can use anything you want, its all personal preference. You can drill your own hole and make your own bulkhead fitting as well.

Just use whatever seems the least disruptive for your install.

When you said coax I didn't know for what... it may not matter at all. I was only giving an example of my ham radio install as I introduced interference in how I ran it. It may or may not effect what you are doing... but its something to take note of.

 

[steveni70]

I stuck 4 ga power wire through this grommet. There was an empty nub so I taped a nail to the wire and shoved it through. It was tight for 4 ga but there won't be any water getting through.

 

[Offcamber]

Reviving an oldish thread, but I'm getting ready to run 1/8 coax through firewall. However, everywhere I look and read about going through the grommet that the electrical loom runs through. Is there any reason I shouldn't run through either of the 2 holes pictured below. My sat antenna runs through this opening on drivers side and in image 2 it shows the hole on passenger side, but it is plugged. This plug is easily removable. It seems to me this would be a much simpler option...unless there is a reason not too.

Thoughts?

I have used both of those locations in your photos. I previously ran a wire harness and additional wires through the driver's side hole after opening it up slightly to fit a grommet. On the passenger's side, I just got done running welding wire and a wire harness through that hole after opening it up a fair amount and using a firewall boot. Both locations worked great. I know a lot of people use the large boots on both sides, but I try to avoid factory wiring whenever possible.

 

[Powder_Hound]

Because its very easy and accessible to get wires in/out of that big grommet... its also a very popular location, lots of people use it.

It just depends on what you are trying to do... You can use anything you want, its all personal preference. You can drill your own hole and make your own bulkhead fitting as well.

Just use whatever seems the least disruptive for your install.

When you said coax I didn't know for what... it may not matter at all. I was only giving an example of my ham radio install as I introduced interference in how I ran it. It may or may not effect what you are doing... but its something to take note of.

Thank you! Yes, I am runnng CB Coax, but the connector is not attached so I am only running 1/8" coax and it looked like it would fit in the smaller hole. I haven't seen anyone use this hole and I was curious if there was a reason why.

Thanks again for confirming my suspicions.