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05-23-2020, 01:31 PM #1
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Powering a TPMS range extender on/about trailer tongue
I have purchased a tire pressure monitoring system (TPMS) and it came with wireless range extender (basically a little wireless receiver/signal booster). I am looking to mount the extender near the tongue of the trailer and have been thinking of where to mount/tie in to power. The range extender has a 2 amp fuse on it and it only needs to be powered when the trailer is hooked up (i.e. when I am traveling).
I have found the junction box where the seven pin trailer wire ties into the trailer (located on the tongue near the wiring block). I am thinking of using a posi-tap connector to get power off the battery charging wire (black) and ground on the white trailer wire also. A few questions for those more electrically inclined:
1. Would the charging wire be moving too many amps to the battery to tie into and result in regular blowing of the 2amp fuse to the little receiver/transmitter...or would that not matter b/c It would just draw what power it needs?
2. Any other concerns/comments or better suggestion on a power source?
Thank you.
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05-23-2020, 02:42 PM #2
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Devices determine the current they draw. A battery can supply in excess of 1000A, but a device that draws just a few milliamps can be connected to a battery with no issues.
John & Kathy
2014 F250 Lariat FX4 6.2L SBCC
2014 Reflection 303RLS
SW Indiana
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05-23-2020, 03:59 PM #3
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Thank you. I thought it would be fine and then I started to second guess/over think it.
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05-24-2020, 08:38 AM #4
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I mounted my TPMS extender in the front pass through storage and connected to my front trailer marker light. I always tow with my lights on so that turns the extender on and off. The extender made a big difference with the connectivity of the TPMS monitor.
Charles and Susan
2021 Ram 3500 Laramie, 6.4 Hemi, 4x4 CCSB
2021 337rls w/ Andersen hitch.
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05-25-2020, 09:49 AM #5
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I found the range extender unnecessary. Tst Tpms on 35' 5th wheel.
Sent from my Pixel 2 using Tapatalk
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05-25-2020, 06:21 PM #6
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- Florida Space Coast
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I wired mine to the front closet. I got 12v from the overhead light.
Larry KE4DMG
2022 F-350 KRU SRW LB - Airlift 5000+, ForScan, 37 RDS Aux Tank,
2019 310GK-R - Sailuns; MorRyde IS; Disc Brakes; 20K Reese Goosebox
Search kalakamods for my mods
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05-30-2020, 09:24 AM #7
Try it without the extender first. I paid extra for the extender and didn't need it.
2018 Reflection 315RLTS
2023 F350 Lariat 6.7L/CC/LB/FX4
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05-31-2020, 09:02 AM #8
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I installed mine inside of the battery box. I also installed a lighted switch on the outside of the box to turn it on and off.
2019 2800bh
2018 Silverado 1500
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05-31-2020, 11:47 AM #9
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I just wired mine directly to the battery and mounted the extender on the battery box.
Dennis, Pat, Prince and the Lady - Western New York
2018 Solitude 310GK- 2016 Silverado 3500HD DRW - Blue Ox Super Ride
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05-31-2020, 12:56 PM #10
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Freezer Opens on Travel Day?
Today, 03:46 PM in Appliances