I just confirmed with my multimeter that that pin 11 does indeed seem to provide constant and pin 16 switched. Many thanks for this info. Now my next task is deciding how to tap it, either with OBD splitter or tapping the wires somewhere behind.
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12V Access: Model S 2021 Refresh
- Thread starter 4SUPER9
- Start date
I’m having the same debate, but tapping wires behind the connector looks cleaner. That would be the main reason for me.
Proppilot
Member
I sound like a Nanny chiming in BUT seeing how Tesla operates, I would be concerned about touching any wires (physical tapping into) around to ODB at risk of them having a warranty issue in the future (IE you have a computer problem and they claimed you tampered with the ODB connector). 4Super9 is talking about a breakout plug that goes into your ODB connector and gives you the wires you need. You can remove the evidence. JMHO FWIW and please disregard if it is deemed as nagging !!
Definitely would lean towards a plug in OBD adapter.. I have seen some that are low profile and you would never know it is there unless you looked for it. If you have to take your car in, it is easy to just unplug. Removes a lot of risk.
I wonder if they have one with a sharp 90* turn so you barely see it... Good call with the low profile option!
Something like this and cut off the other end to expose the wires you need?
Proppilot
Member
Or this. Ready to go !
OLLGEN 1.64ft 50cm OBD2 16 Pin Low Profile Flat Wire J1962 Male Connector to Open Plug Cord Auto Car OBD Diagnostic Extension DIY Pigtail Mobley Cable Adapter (Male Connector Pigtail)
https://www.amazon.com/dp/B07WSTH5M5/ref=cm_sw_r_cp_api_glt_fabc_7K8GDKH9J4MY9V2HSTMN
Love this one! I like how small the wires are. Easy enough to cut, solder, and heatshrink the two pins. Good find!
Looks like the other one is backordered til March :-(
This is perfect. I will be utilizing this for a much cleaner install without tapping. Thanks!
FYI as some reviews mention this item is not as advertised - it does not have individual wires for every conductor so will not work for the purpose of cutting the other end off and connecting that way. Back to searching for a different solution.
This one is not as pretty, but does the job, and had the benefit of also being a splitter. It is what I am using now.
Well, I ordered it anyways and it will be delivered Friday. I'll see if pin16 is one of the wires that are available.
16 is, but not 11 (for constant power). The second one I ordered is this one: Amazon.com
I like the low profile 90 degree angle of these so they don't intrude too much into the footwell.
THX723
Member
Yeah, that's why I like the 90 degree one too. Well, I'm wiring a radar detector so 16 works perfect for me! Thanks!
I got it today. There are 8 wires, pin 16 doesn’t connect to any of them. Pin 4 was ground, and pin 11 only gave me 2.4 volts. So I went with the green and black up by the mirror as a previous person posted (thanks for that info btw, sorry I don’t recall the name and don’t want to look back at the moment) I had 15+V up there and it worked for a bit, but I came back later and there’s no power. Gonna check it out in the am, I was kinda rushing and may not have had a good solder connection. Hoping that’s it anyway as I verified it shut off and turned on with the door close/open.
So oddly I checked my connections today and they were fine. I'm now only getting about 3.6v on the green and black wires up by the mirror feeding the camera. Tried resets, driving, etc. So I'll have to find and use an alternate switched source.
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