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Old 06-25-2019, 12:37 AM   #1
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Re-wiring OBD2 adapter

Hi guys. As the title suggests, I want to leave in the Bluetooth adapter on a permanent basis, the downside is that it always draws power from the OBD port from a +12. Now my research tells me that port 1 is an ignition live and port 16 is a permanent live.
Therefore an I right to assume to I can remove pin 16 from the adapter and where it connects to the circuit board re-wire that to pin 1?

Has anyone successfully done this to confirm? I know I could buy a switch and use a relay from ignition, but that would require wiring external to the adapter and it's location means I would prefer to not do that.

Cheers guys, any thoughts?


Last edited by BoxPaulie; 06-25-2019 at 01:57 AM.
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Old 06-25-2019, 06:38 AM   #2
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The amount of power it draws is minuscule.
Unless you are leaving it in for weeks at a time and not driving the car, should not be a problem to leave it as it is.

If you are still worried about flattening y9our battery, use a battery maintainer. Not a bad idea anyway if the car doesn't get driven regularly
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Old 06-25-2019, 04:32 PM   #3
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Thanks Jay. I understand that the draw might be tiny, but I've essentially got a LED flashing device in my car at all times day and night. A solution is surely to rewire the device so it goes on and off with ignition, it makes sense and will surely work. I'd be amazed if no one has tried this already.


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Originally Posted by JayG View Post
The amount of power it draws is minuscule.
Unless you are leaving it in for weeks at a time and not driving the car, should not be a problem to leave it as it is.

If you are still worried about flattening y9our battery, use a battery maintainer. Not a bad idea anyway if the car doesn't get driven regularly
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Old 06-25-2019, 06:51 PM   #4
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The current drain is so small...I've left mine in for weeks with no issue.

What you propose would work just fine, though.
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Old 06-25-2019, 07:03 PM   #5
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Quote:
Originally Posted by BoxPaulie View Post
Thanks Jay. I understand that the draw might be tiny, but I've essentially got a LED flashing device in my car at all times day and night. A solution is surely to rewire the device so it goes on and off with ignition, it makes sense and will surely work. I'd be amazed if no one has tried this already.
KISS
put a piece of tape over the LEDs

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