Fuse 12 20A keeps blowing. controls OBDII and cigar lighter

'"Lighter Ports"? You mean accessory power outlets and cigarette lighters?

Fuses 26 and 31.

Buick Lucerne (2006-2011) fuses and relays

Fuse Box Diagrams https://fuse-box.info > buick > buick-lucerne-2006-20...

Cigar lighter (power outlet) fuses in the Buick Lucerne are the fuses ? F14 and F23 in the Rear Under seat Fuse Box (2006-2007) or fuses ? F26 and F31 in the Rear ...

2008 Buick Lucerne fuse box diagram

StartMyCar https://www.startmycar.com > Lucerne > Fuse box
The 2008 Buick Lucerne has 2 different fuse boxes: Underhood Fuse Block diagram. Rear Underseat Fuse Block diagram. Buick Lucerne fuse box diagrams change ...

No , can't be the relay , by looking at a wiring diagram the power outlet has different supply voltage . Fuse 1 25 amp is for power outlet an cigar lighter use's fuse # 2 25 amp. Free wiring diagrams here http://www.bbbind.com/free-tsb/ Enter vehicle info. year , make , model an engine size. Under system click on interior & driver amenity, then under subsystem click on cigar lighter . Click the search button , then the blue link. Looking at the diagram you will see they have different fuse's. Something up stream from there is blown . Need to look at electrical distribution diagrams. Go back to system an click on electrical distribution then under subsystem click on power distribution . Click the search button then the blue link. Scroll down to the # 6 diagram . You will see fuse # 4 50 amp location is under hood fuse box . Check that fuse .

Maybe something wrong with cigar lighter socket? The top wire is voltage, bottom is ground for cigar lighter. If the voltage circuit was shorted to ground, it would blow the fuse w/o anything plugged in. If the component your plugging into the cigar lighter is drawing too much, it will blow the fuse.

The cigar lighter socket could be shorted or the wiring circuit could be short to ground somewhere , Do you know how to find a short circuit ? Videos on youtube .

AUX PWR Fuse #41
20A
Auxiliary Power Outlets - this not Cigar lighter ,the power outlet is bad. replace it or short to ground in wiring.
CIGAR Fuse #47
15A
Data Link Connector, Cigar Lighter




the power

cigarette lighter socket has a short more likely.

most common cause for this is the fuse that powers the OBDII connector is also on the accessory or cigar lighter fuse circuit and loses power when that fuse blows

Where is fog light fuse located which one is it

Have this checked with another scan tool. Link error is produced when the PCM fails to respond to the scan tool. More times than not this is the PCM failing.

This is a fuse problem, check the fuse, it will either be marked lighter or power point, the fuse box is to the left of the steering column it has a plastic cover over it, inside the cover the fuses will be marked on a diagram. If the fuse blows again the cigar lighter is shorted, you will have to replace it, most times the lighter element is the problem and not the well it fits into.