# Which fuse to hook up OBD2 reader?

**URL:** <https://community.cartalk.com/t/which-fuse-to-hook-up-obd2-reader/115214>\
**Category:** Maintenance/Repairs\
**Tags:** towncar, lincoln\
**Created:** [April 8, 2018, 3:31am UTC](https://community.cartalk.com/t/which-fuse-to-hook-up-obd2-reader/115214 "2018-04-08T03:31:56Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![willie55](https://avatars.discourse-cdn.com/v4/letter/w/8e7dd6/32.png) [@willie55](https://community.cartalk.com/u/willie55)\
**Post date:** [April 8, 2018, 3:31am UTC](https://community.cartalk.com/t/which-fuse-to-hook-up-obd2-reader/115214/1 "2018-04-08T03:31:57Z")

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what blows the fuse that you hook obd2 reader to thank you

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**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\
**Post date:** [April 8, 2018, 2:21pm UTC](https://community.cartalk.com/t/which-fuse-to-hook-up-obd2-reader/115214/2 "2018-04-08T14:21:11Z")

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Huh? You’re supposed to be plugging it in.  
The short answer is “current”. The long answer is that you have a short-to-ground somewhere in the circuit.

More information, like the year of the car, the engine, the mileage, other symptoms, and… **perhaps most important of all… what problem(s) you’re trying to diagnose**, might yield a whole host of clues that could help us help you.

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**Author:** ![BillRussell](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/billrussell/32/3179_2.png) [@BillRussell](https://community.cartalk.com/u/BillRussell)\
**Post date:** [April 8, 2018, 2:23pm UTC](https://community.cartalk.com/t/which-fuse-to-hook-up-obd2-reader/115214/3 "2018-04-08T14:23:49Z")

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Can you clarify? you don’t get points for short questions, please take the time to provide the needed details. In good English please.

You don’t hook the reader to a fuse, you plug it into a matching connector under the dash.

Do you mean a fuse blows when you plug in the reader? which fuse?

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**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\
**Post date:** [April 8, 2018, 9:24pm UTC](https://community.cartalk.com/t/which-fuse-to-hook-up-obd2-reader/115214/4 "2018-04-08T21:24:13Z")

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Fuse #23 supplies power to the OBDII connector and the cigar lighter, if that fuse continues to blow look for a short in the lighter socket.