Keeping key fob in Jeep

ThirtyOne

Well-Known Member
Rock Sponsor (Level 1)
Joined
Apr 18, 2017
Messages
4,607
Reaction score
6,560
Location
Chapel Hill, NC
Website
www.jeepdoodles.com
Vehicle(s)
2018 Jeep Wrangler Sport S, 2017 Chevy Tahoe, 2005 Jeep Liberty
I don't have my JL yet, so I don't have a fob to test, but I did try some quick tests on my cell phone and found the following. I didn't test every combination.
  • The cell phone signal is blocked if you put the cell phone on a stainless steel tray and covering it with a stainless steel bowl.
  • If you wrap the cell phone in aluminum foil:
    • the cell phone signal is blocked
    • the bluetooth signal is block
    • the wifi signal is blocked even though the wifi access point antenna was less than 2 ft away
Ok. Now I have to try. Give me a minute to wrap my fob in aluminum foil.





Advertisement

 

NavyVet1959

Banned
Banned
First Name
OldFart
Joined
Apr 11, 2018
Messages
1,255
Reaction score
1,113
Location
Texas, ya'll
Vehicle(s)
XJ (sold), WJ (sold), Ram 1500 QC 4x4 (sold 2018.06.07), Wrangler JL Sport 2-door (ordered 2018.06.08)
Occupation
Retired engineer (NASA, aerospace, DoD); ex-Navy
Vehicle Showcase
1
Ok. Now I have to try. Give me a minute to wrap my fob in aluminum foil.
I was going to try cutting the top and bottom out of a beer can and squeezing it flat to see how that might work, but my phone was too big for a normal size beer can and I didn't have any of the Foster's 25oz cans handy.

But I did try the beer can with my garage remote control and it did block the signal.

So, it's possible that you could take two beer cans and carefully cut the top out of one and the bottom out of the other so that they could slip together and *look* like a single beer can and put your fob in there.
 
Last edited:

ThirtyOne

Well-Known Member
Rock Sponsor (Level 1)
Joined
Apr 18, 2017
Messages
4,607
Reaction score
6,560
Location
Chapel Hill, NC
Website
www.jeepdoodles.com
Vehicle(s)
2018 Jeep Wrangler Sport S, 2017 Chevy Tahoe, 2005 Jeep Liberty
Aluminum foil does block the fob.

Ironically it took me a little while to find my fob. I had left it in the Jeep.
 

NavyVet1959

Banned
Banned
First Name
OldFart
Joined
Apr 11, 2018
Messages
1,255
Reaction score
1,113
Location
Texas, ya'll
Vehicle(s)
XJ (sold), WJ (sold), Ram 1500 QC 4x4 (sold 2018.06.07), Wrangler JL Sport 2-door (ordered 2018.06.08)
Occupation
Retired engineer (NASA, aerospace, DoD); ex-Navy
Vehicle Showcase
1
Aluminum foil does block the fob.

Ironically it took me a little while to find my fob. I had left it in the Jeep.
Try the beer can method that I mentioned above.
 

ThirtyOne

Well-Known Member
Rock Sponsor (Level 1)
Joined
Apr 18, 2017
Messages
4,607
Reaction score
6,560
Location
Chapel Hill, NC
Website
www.jeepdoodles.com
Vehicle(s)
2018 Jeep Wrangler Sport S, 2017 Chevy Tahoe, 2005 Jeep Liberty
Try the beer can method that I mentioned above.
I drink bottles.

You could take a box, co er it with aluminum foil, and write “used condoms” on it with a Sharpie.

Then put the fob in there.
 

NavyVet1959

Banned
Banned
First Name
OldFart
Joined
Apr 11, 2018
Messages
1,255
Reaction score
1,113
Location
Texas, ya'll
Vehicle(s)
XJ (sold), WJ (sold), Ram 1500 QC 4x4 (sold 2018.06.07), Wrangler JL Sport 2-door (ordered 2018.06.08)
Occupation
Retired engineer (NASA, aerospace, DoD); ex-Navy
Vehicle Showcase
1
I drink bottles.
I drink *kegs*... :)

They would probably work, but they're a bit large to be carrying around in your car just to act as an RFID shield. :)

The worst part of having a kegerator is trying to decide what beer you want to be drinking for the next 6 months. I'm the only one who drinks around here and a standard size (15.5 gal) keg lasts me 6 months.

I don't think bottles would work that well unless you used one of those aluminum bottles that I believe Bud came out with at one time.

Of course, one danger of putting in in a beer can like that would be your wife seeing the beer can and deciding to clean out the vehicle and throwing it away. Even the most basic key fob for the Sport model that has *no* buttons on it costs $168 from what I've gathered.

Now, there are some of the hard eyeglasses cases that are probably big enough for the fob to fit in. If you put a couple of layers of aluminum foil in one of them, it might work.
 
Last edited:

NavyVet1959

Banned
Banned
First Name
OldFart
Joined
Apr 11, 2018
Messages
1,255
Reaction score
1,113
Location
Texas, ya'll
Vehicle(s)
XJ (sold), WJ (sold), Ram 1500 QC 4x4 (sold 2018.06.07), Wrangler JL Sport 2-door (ordered 2018.06.08)
Occupation
Retired engineer (NASA, aerospace, DoD); ex-Navy
Vehicle Showcase
1
I was watching a video on YouTube earlier this evening where someone was showing how to remove and replace the radio on the Wrangler JL. As I was watching it, I got an idea for a possible modification that might be interesting for some folks at some point.

In order to get to the raido, the panel containing the Start button has to be removed first. I noticed that when he did it, there was some sort of modular connector that goes to the back of it on the left side and it was wiring that goes to the starter button. There were more than the 2 wires going into the back of it that you would normally think would be used just for a switch, but that's probably because of the lights on the switch that get activated depending upon the state the vehicle is in. One of the wires is going to be a ground and the other is going to be the control line for the switch that is going to go back to the car's computer.

If a person was to cut that control line and solder a pair of wires to the two newly cut ends and then route that line somewhere else in the car, they could put a hidden switch that would need to be turned on in order for the car's Start button to work. And, of course, you could wire it so that a certain number of ON-OFF-ON switches had to be set in a particular order for even more security. We would be talking low voltage low current signal wiring here, so one of the small switches that can be purchased for less than $1 on eBay would work perfectly. Or, if you really wanted to be discrete, you could go with one of the very small momentary contact pushbutton switches and wire it so that you had to press and hold it when you were pressing the normal switch in order for the computer to get the signal. Or you could leave that the normal pushbutton switch in the panel as a dummy that still lit up, but the actual push button was hidden somewhere else.

Or maybe even find a place on the panel where you could mount a keyed switch. Then you could use a key to make it look like a normal keyed ignition switch.

Hmmm... I see some possibilities here...
 

JIMBOX

Well-Known Member
First Name
JAMES
Joined
Feb 19, 2018
Messages
1,705
Reaction score
1,664
Location
FERNLEY NV
Vehicle(s)
2018 HELLAYELLA JLU SAHARA/2016 "STINGER YELLOW" RAM
I have 4 vehicles--2 TOYOTAS/RAM/JL and strangely enough--i only drive ONE AT A TIME-

There is no way I'll leave a FOB in a vehicle-that reeks -stupidity !

Whatever

JIMBO
 
OP
WranglerMan

WranglerMan

Well-Known Member
First Name
Will
Joined
May 8, 2018
Messages
2,129
Reaction score
1,438
Location
Katy Texas
Vehicle(s)
2018 Wrangler JLU Sahara
Occupation
Gas Pipeliner
Vehicle Showcase
1
  • Thread starter
  • Thread Starter
  • #24
I was just leaving it in there since it’s garage kept but as stated by some leaving the fob in the Jeep may keep it talking to the onboard brain and cause issues like running the battery down or keeping the dash display message from going out when it’s supposed to as it thinks it’s getting ready to be started since the fob is in the Jeep.
 

Biscuit

Well-Known Member
Joined
May 5, 2018
Messages
544
Reaction score
546
Location
Northeast Ohio
Vehicle(s)
2018 JLU Sport
Occupation
Retired
Damn, some of you guys sure go to great lengths to disable theft prevention features, among other things. :computerrage:
 

NavyVet1959

Banned
Banned
First Name
OldFart
Joined
Apr 11, 2018
Messages
1,255
Reaction score
1,113
Location
Texas, ya'll
Vehicle(s)
XJ (sold), WJ (sold), Ram 1500 QC 4x4 (sold 2018.06.07), Wrangler JL Sport 2-door (ordered 2018.06.08)
Occupation
Retired engineer (NASA, aerospace, DoD); ex-Navy
Vehicle Showcase
1
Damn, some of you guys sure go to great lengths to disable theft prevention features, among other things. :computerrage:
I don't agree with routinely leaving the fob in the vehicle, but there are rare occasions where it *might* be necessary. For example, when I go diving, I prefer to carry the key to the vehicle on me even when I'm underwater. I don't need the remote control / fob while I'm there, so I will leave it in the vehicle and just take the key with me. That was not a problem with my XJ or Ram, but it would be a problem with the JL and it's keyless ignition. If someone was to enter my XJ or Ram while I was away, they might have the door remote control fob, but it does not allow them to start the vehicle, so they would not be driving it away. With the JL though, if you lock your fob in the car and it is not in a RF blocking container or if they find it, then they are going to be able to drive away with the vehicle. I consider that unacceptable for my likely uses of the vehicle. As such, before I would use it in that manner, I would take additional measures -- removing the battery from the fob, installing a hidden additional switch that must be pressed while the normal start button is pressed, etc.
 

NavyVet1959

Banned
Banned
First Name
OldFart
Joined
Apr 11, 2018
Messages
1,255
Reaction score
1,113
Location
Texas, ya'll
Vehicle(s)
XJ (sold), WJ (sold), Ram 1500 QC 4x4 (sold 2018.06.07), Wrangler JL Sport 2-door (ordered 2018.06.08)
Occupation
Retired engineer (NASA, aerospace, DoD); ex-Navy
Vehicle Showcase
1

Firstwave

Well-Known Member
First Name
Dave
Joined
May 28, 2018
Messages
98
Reaction score
244
Location
Washington
Vehicle(s)
2018 JL Sahara 2018 Mazda CX9
May not be for everyone but this is my solution to an oversize key fob.

61OFdHcKWtL._SL1001_.jpg


81CMJDyyj3L._SL1500_.jpg
 

Advertisement




Dwayne Lane's Chrysler Jeep Dodge
 



Advertisement
Top