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TPMS and Key Fobs

mactac
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mactac New Member

mactac

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Posted (edited)

Hello.

I'm new to this forum but I've been reading on in for a while now. There is some really good information in here. I'm hoping someone may have run into the same issue as what I'm having.

I have a new 2021 Sierra 1500 work truck with only 3000 miles on it. I've added after market parking sensors to the rear bumper and tapped into constant 12v power on the round trailer connector. I'm not sure if this is coincidental but I noticed a day later that none of my TPMS senors register and the Key Fobs only work at a very close range? Weird huh..  I've read that the TMPS and Key Fobs work together? Has anyone else experience this issue where none of the TPMS sensors register and the Key Fobs only work at a close range? I do have an appointment with the dealer next week. I've also tried to reset the TPMS sensors using the procedures in the owners manual.

Edited by mactac
misspelled word
gemarsh Senior Enthusiast

gemarsh

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Posted
13 minutes ago, mactac said:

Hello.

I'm new to this forum but I've been reading on in for a while now. There is some really good information in here. I'm hoping someone may have run into the same issue as what I'm having.

I have a new 2021 Sierra 1500 work truck with only 3000 miles on it. I've added after market parking sensors to the rear bumper and tapped into constant 12v power on the round trailer connector. I'm not sure if this is coincidental but I noticed a day later that none of my TPMS senors register and the Key Fobs only work at a very close range? Weird huh..  I've read that the TMPS and Key Fobs work together? Has anyone else experience this issue where none of the TPMS sensors register and the Key Fobs only work at a close range? I do have an appointment with the dealer next week. I've also tried to reset the TPMS sensors using the procedures in the owners manual.

Can you untap your 12v source and see if the issue goes away? 

mactac New Member

mactac

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Posted (edited)

Gmarsh.. Thank you, I think I just failed basic troubleshooting 101. Disconnected 12v at my tap and reset the TMPS  and everything works including the Key Fobs. I never would have expected that from a tap at the trailer plug!

Do you know a good place to get 12v at or near the rear bumper?

 

Edited by mactac
misspelled word
mactac New Member

mactac

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I'm using a tadibrothers aftermarket kit that allows sensing for both the front and rear sensors. It has triggers for reverse and breaking, it states you need constant 12v for the controller so the triggers decide which sensors are being use. This is why I tapped on the 12v trailer connector.

 

Thanks for the help.

ChrisR2021 Enthusiast

ChrisR2021

Posted
Posted

Could it be the brain box that is causing the problem? Sounds like the wireless brain box is on a frequency close to that of the truck wireless. 

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mactac New Member

mactac

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Yes, I agree and believe the wireless brain is like you said " is on a frequency close to that of the truck wireless" I rerouted power directly to the battery and I have the same results. I'll be calling tadibrothers tomorrow.

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