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OBDport has no power

Tiny
DENALIWONTSTOP
  • MEMBER
  • 2006 BUICK LA CROSSE
  • 182,000 MILES
The OBD port is getting no power. The fuse for the cigarette lighters is still good.
Sunday, August 12th, 2018 AT 2:19 PM

10 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon.

The DLC is powered by its own fuse in the inside fuse block in the car. Check for the fuse block on the end of the dash when you open the door. You have to pull off a cover.

I attached a wiring diagram for you to view on what it says for the fuse.

What concerns me is why it failed. Fuses blow for a reason. If you do not find the reason it will continue to fail.

Roy
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Sunday, August 12th, 2018 AT 3:32 PM
Tiny
DENALIWONTSTOP
  • MEMBER
  • 6 POSTS
I have a different diagram for the fuse box on the end of the dash for a 2006 Buick LaCrosse.
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Monday, August 13th, 2018 AT 2:59 AM
Tiny
DENALIWONTSTOP
  • MEMBER
  • 6 POSTS
I attached pictures of the diagram and the fuse box. Thank you.
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Monday, August 13th, 2018 AT 3:01 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Did you use a test light and verify power to fuses and power on both sides of the fuses?

Roy
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Monday, August 13th, 2018 AT 3:23 AM
Tiny
DENALIWONTSTOP
  • MEMBER
  • 6 POSTS
Yes sir, even put a new one in it.
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Monday, August 13th, 2018 AT 3:35 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
New one in what? Did you check for power on pin 16 of the DLC?
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Monday, August 13th, 2018 AT 3:39 AM
Tiny
DENALIWONTSTOP
  • MEMBER
  • 6 POSTS
New fuse under the hood and yes sir.
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Monday, August 13th, 2018 AT 3:54 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
The fuse is not under the hood it is in the interior fuse block as listed.

Did you verify power on all the fuses on both sides?

Roy
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Monday, August 13th, 2018 AT 3:58 AM
Tiny
DENALIWONTSTOP
  • MEMBER
  • 6 POSTS
I changed the cigarette lighter fuse under the hood, but I do not have the DLC fuse on the diagram.
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Monday, August 13th, 2018 AT 6:51 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Again, the cigarette lighter fuse is not the fuse.

It is the OnStar fuse in the interior fuse block as indicated in the diagram.

If you have power on both sides then you have a wiring issue between the fuse block and the DLC.

Roy
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Monday, August 13th, 2018 AT 7:53 AM

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