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Need help installing GMRS radio

Discussion in '2nd Gen. Tacomas (2005-2015)' started by ReeceRiley, Jun 18, 2020.

  1. Jun 18, 2020 at 9:51 AM
    #1
    ReeceRiley

    ReeceRiley [OP] Active Member

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    I’ve got a 2008 regular cab manual sr5 and I want to install a GMRS radio. I want to the radio to the battery but have it turn off when I shut the truck off, could someone tell me where to run the wires to the engine bay and where to attach the wires to so that the radio shuts off when the car shuts off
     
  2. Jun 18, 2020 at 9:54 AM
    #2
    SnowroxKT

    SnowroxKT Well-Known Member

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  3. Jun 18, 2020 at 9:58 AM
    #3
    ReeceRiley

    ReeceRiley [OP] Active Member

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  4. Jun 18, 2020 at 10:02 AM
    #4
    ReeceRiley

    ReeceRiley [OP] Active Member

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    What is an add a circuit
     
  5. Jun 18, 2020 at 11:13 AM
    #5
    Sig45

    Sig45 Well-Known Member

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  6. Jun 18, 2020 at 11:17 AM
    #6
    JdevTac

    JdevTac Bawnjourno

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    So the add-a-circuit thing is fine but I wouldn’t run that as my power source. What you can do is set it up as a relayed 12v line from the battery, using an ignition only circuit as your trigger for said relay.

    but ideally you should run power straight to battery and ground to either battery or nearest body ground and leave it at that and make sure to just turn it off when truck is off. It also makes it so you can turn the radio on and use it real quick if the truck is off, rather than have to turn the engine on.
     
  7. Jun 18, 2020 at 11:20 AM
    #7
    2013XSPX

    2013XSPX Well-Known Member

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    I run my MXT 400 right to the battery. It's 40 watts. Just remember to turn it off.
     
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  8. Jun 18, 2020 at 5:47 PM
    #8
    Old Swamper

    Old Swamper Tacoma World Poor

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    Last edited: Jun 18, 2020
  9. Jun 18, 2020 at 7:04 PM
    #9
    rednext

    rednext Well-Known Member

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    I have run 2-way radios in my trucks for years on the farm and the only way it'll kill the battery is if you leave it on for a week straight (and there's lots of traffic on the radio at the same time). If you use your truck daily, or every other day, you'll be fine. Or just turn the radio off when leaving. I tend to agree that it needs to be run straight to the battery with an inline fuse
     
  10. Jun 18, 2020 at 7:08 PM
    #10
    m603holden

    m603holden @Koditten Pirate Radio member #063

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    Careful. Those more power gmrs radios can pull 25amps +. Those cigarette outlets have a 10 or 15 amp source
     
  11. Jun 18, 2020 at 7:57 PM
    #11
    Old Swamper

    Old Swamper Tacoma World Poor

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    His model is a 15 watt one.
     
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  12. Jun 18, 2020 at 8:00 PM
    #12
    ReeceRiley

    ReeceRiley [OP] Active Member

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    I set it up today, I rain it straight off the battery. The radio it self is under the drivers seat
     
  13. Jun 18, 2020 at 8:00 PM
    #13
    ReeceRiley

    ReeceRiley [OP] Active Member

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    I’ll have pictures tomorrow
     
  14. Jun 18, 2020 at 8:05 PM
    #14
    Myrtle Beach Taco

    Myrtle Beach Taco Member

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    You should actually run an inline fuse on both the positive and the negative line. That is the way a lot of mobile devices in hamreadio are wired.
     
  15. Jun 19, 2020 at 2:49 AM
    #15
    m603holden

    m603holden @Koditten Pirate Radio member #063

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    Indeed. I was referring to yours. Was just putting it out there. Didn't know if you had the 50w version. Seems you know the deal though.
     
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  16. Jun 19, 2020 at 6:31 AM
    #16
    DG92071

    DG92071 Well-Known Member

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    The amount if current that your radio draws is extremely small. A relay is definitely not required. An add a circuit is fine.

    The amplifier section of your radio uses 1.25 amps at 12 volts, the rest of its power consumption is lights for its display.
     
  17. Jun 19, 2020 at 6:44 AM
    #17
    golfindia

    golfindia Well-Known Member

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    If you are not comfortable constructing your own relay:

    https://powerwerx.com/automotive-dc-timer-lvd-battery-guard

    Not the cheapest, but easy and cheap are usually mutually exclusive.

    I'm not up on GMRS rigs, but lots of ham rigs have auto power off settings. Remember, if you make a key-on relay and you want to use your radio while stationary, your truck will be chiming the whole time your door is open. That's sub optimal.
     
  18. Jun 19, 2020 at 7:17 AM
    #18
    m603holden

    m603holden @Koditten Pirate Radio member #063

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    @ReeceRiley

    I mean I probably wouldn't do any of that. If you want to use your radio when the truck is off, you'd have no option.

    Which you will use the radio when the truck is off. Just how it is.
     
  19. Jun 19, 2020 at 7:39 AM
    #19
    DG92071

    DG92071 Well-Known Member

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