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Best way to put wires through firewall in 21 Tacoma

Discussion in 'Audio & Video' started by MDOverlander, Dec 16, 2021.

  1. Dec 16, 2021 at 9:11 AM
    #1
    MDOverlander

    MDOverlander [OP] Well-Known Member

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    Have lights and coax cable to run through the firewall.

    What’s the best way to do it?
    Through the side of the grommet?
    Any other grommets in the firewall that would be better?

    Coax end is large and I don’t want to put a big hole in the grommet.

    CF6254D9-989A-4C2D-8DAA-B7CBA0427BFA.jpg
    72D04DB5-2C3D-4A8A-B5EF-5C687F4129F9.jpg
    64F4DDCA-FD9E-4E3B-8670-8D8879A4EBD5.jpg
     
    HI_Taco and pinktaco808 like this.
  2. Dec 16, 2021 at 9:23 AM
    #2
    pinktaco808

    pinktaco808 Hot Steppa

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    Wtf that lol
     
  3. Dec 16, 2021 at 10:19 AM
    #3
    RDW59565

    RDW59565 Well-Known Member

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    Brace yourself, and prepare to cut off the PL-259 connector. Unless you want to drill, you will probably end up pushing the RG-58 through and adding the connector after you have passed through the firewall.
     
    Mutzdude likes this.
  4. Dec 16, 2021 at 10:23 AM
    #4
    Mikestill

    Mikestill Well-Known Member

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    Cut the pl-259 off, pass the coax through, recrimp new pl-259..
     
    Mutzdude likes this.
  5. Dec 16, 2021 at 10:29 AM
    #5
    Cudgel

    Cudgel “Tonka”

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    Concur. Cut the coax. Good opportunity to optimize the new length and your transmit wavelengths to keep out of phase. There’s another hole under glove box or just drill, paint and grommet new ones as needed.
     
  6. Dec 16, 2021 at 10:31 AM
    #6
    Gutentight

    Gutentight Well-Known Member

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    Above and left of the main harness you have the opening in the fiberglass and flat bare spot on the firewall. Nothing behind it inside the cab.

    Drill a small hole there and find where to make a cut in the carpet inside. Then get a step drill to install a proper grommet, which you can use for all the other wires you end up with too.

    I don’t like to mess around with the main harness $$$.

    https://www.amazon.com/Daystar-Universal-Firewall-Accommodates-KU20040BK/dp/B004K2285E
     
  7. Dec 16, 2021 at 12:54 PM
    #7
    MDOverlander

    MDOverlander [OP] Well-Known Member

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    The grommet in the picture pushes to the side easily. And the metal doesn’t have a sharp edge. Can I just run the wire around the grommet and add a little silicone to seal it up?
     
  8. Dec 16, 2021 at 3:38 PM
    #8
    ZMan2k2

    ZMan2k2 “Hold my beer and watch this!”

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    Putting any wire through the firewall that is directly in contact with the firewall is not good. Bumps, road vibration and time will wear through the sheath, and ground the wire, making it useless.
     
    Gutentight likes this.
  9. Dec 16, 2021 at 3:49 PM
    #9
    Gutentight

    Gutentight Well-Known Member

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    Do as you will, but it’s cheap and easy to do it right.

    Here is my work. Obviously not wired up yet, so I just plugged the grommet hole for the moment. You can trim the boot back for larger openings to accommodate more wires in the future.

    4D911848-46BA-4088-8AB7-E4B0C4BD2D15.jpg
     
    MDOverlander [OP] likes this.
  10. Dec 16, 2021 at 5:34 PM
    #10
    MDOverlander

    MDOverlander [OP] Well-Known Member

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    I have the same plate and I will be using relays and fuse box for my electronics
     
  11. Jan 6, 2022 at 3:49 PM
    #11
    HI_Taco

    HI_Taco Member

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    What did you end up doing?
     
  12. Jan 6, 2022 at 5:30 PM
    #12
    Wire4Money

    Wire4Money Well-Known Member

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    FA51B631-E07F-4B86-B42D-C120460864C9.jpg There is an unused grommet just above the brake booster
     
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  13. Jan 6, 2022 at 7:21 PM
    #13
    MDOverlander

    MDOverlander [OP] Well-Known Member

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    This is my plate

    7BD15135-7947-464C-A440-F6FE3509D1C7.jpg
    9B3E6CFF-F205-46E2-B7C2-EB2BB49DCAFC.jpg
     
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