So you decided to fix your DC port, Cigarette lighter port, and or OBD-2 port not working.
OBD-2 Port Not Working,
OBD-2 Port Not Working,
or cigarette port on the front dash
high forward dash not working? The one above the cup holders.
Not the one in the center console by front of the hand brake. That one still works.
CAUSE:
I plugged in a power station for a minute into the DC cigarette port and it overheated and blew the fuse.
Optional option to fix blowing fuses:
I installed a 12v plug directly to my battery to use for charging my power station. [Link] to post.
FIX:
Fuse called "Lighter" in other Cobalt schematics on this blog, it's number #29 technically speaking which is located in the hood fuse box. See picture it's the left 'arrow' line in the image below.
The text of the image is;
15A - ATM - Blue OBD-2 Port Not Working.
A replacement Fuse 15A is needed.
It is a mini fuse but not mini mini like an ATR fuse, this used a ATM fuse. There are other larger fuses typical sizes all over and relays the black small boxes. So it is the 3rd type and or smallest but not the most mini you can buy they can be very small on the rack in the store.
You'll see it is middle finger nail size instead of thumb nail size the other larger typical fuse size.
It is blue shows a 15 on the top. It's lite blue actually. Replaced with darker blue it's fine.
The fuse box is on the right of the car in front of the driver (so right side when looking at engine when hood is up) look for a box almost shoe size has a red cap on the front circular. There is a left side and right side catch on each side to pull outwards some to loosen it and lift but the 'clasps' don't actually move much just plastic they are clamp over catch clamp type like any catch made of plastic like a egg carton clasp clamp. Should be obvious when working on lifting up and off. Set it aside. There is a "schematic" inside under the top cover printed on the plastic.
It is 'lighter" in the middle of the fuse box on the left side above a red 10A fuse and nothing is above the blue 15A fuse for another spot or 2.
Just pull up on it and remove, wiggle it, yank it, and the little metal belt in it will be cut in half looking. Means it is blown.
It is the "ATM" version not ATR version which is even smaller and or slimmer. Cost about $7 for a box of fuses.
I am not 100% the high cup holders DC cigarette port was not working but I know the lower was working. I plugged in the power station to the high port and it didn't do much then seems to have burnt the outlet out then I briefly plugged in the power station to the low port and same not much so quickly unplugged it. Then noticed later my ultra gauge plugged into my obd2 port was not working. Swapped the 15A fuse for "lighter" under the hood in the fuse box and ultra gauge worked again. The lower lighter DC port was always working. Charging my phone all day until I got to parts store for fuse. No idea why it was working. Swapping lighter if they burn out is a major hassle. I did a post about it. High port is now working. Doesn't seem these ports are made for the high power and deeper port needed to fully insert the plug to a power station. Immediately did low output and failed burnt a fuse so need an upgrade to charge power stations in the Chevy Cobalt.
The power station was a Bluetti EB3A (now discontinued) takes 20V and 200 watt solar max not sure it's DC cigarette plug requirements certainly more draw than the Cobalt is giving. Figured it would trickle charge with all the EB3A features.
Google says I can use the app to put it in silent mode so it draws only 100 watts (low current mode). For the car's 12V socket.The 2005 Chevy Cobalt 12V accessory power outlet (located in the center console) is rated for a maximum of 20 amps. This allows for a total power capacity of approximately 240 watts (12V x 20A). [1]
2005 Chevy Cobalt 12V Socket Details
- Maximum Rating: 20 Amps
- Voltage: 12 Volts
- Location: Center console, rearward of the shift lever.
- Usage Notes: Always use a 20A or lower device. High-power devices can blow the vehicle's accessory fuse.
- Product Replacement: Compatible replacement sockets include OEM #25774623 or Dorman 56457
Note: The 2006 model, which shares similar architecture, often features a 20A fuse for the console and a 15A fuse for the cigarette lighter.
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Day 2:
Put the EB3A in "silent" mode using the bluetti app and Bluetooth connection. Turns out it had 2 ways first was to "pair" it then connect Bluetooth in the app next. So just power on station left power button highest top left button and launch the app was able to use "offline" mode which is the first screen the app shows online or offline mode.
So on the app it lets you select from 3 setting the standard mode, silent for 100watt max draw (low power mode) and turbo mode to quickly charge.
I plug in the EB3A and get some power to the EB3A going from the cup holder top 12v port DC and in a minute the power in going to the EB3A cuts out to zero (again, like yesterday). Try the center console port and input of power increases to 100 watts but in a minute cuts to zero.
I then plug in the ultra gauge to the OBD2 port and it is not working (again). So the fix is the same swap in a new 15A fuse (again). Ultra gauge works and 12 volt ports work again.
So silent mode aka low power mode does not work for the Chevy Cobalt 2005.
Interestingly, internet search results show a 20A fuse exists called "outlet" it is the same location as the 15A I swapped. Schematics say it is cigarette, etc... for the 20A it was in a video. Then Google said it was a 20A mini fuse as well. It isn't for the 2005 sedan unless my 15A used to be a 20A maybe that's the problem. No idea now.