Why does my car's power outlet stop working after I switch the vehicle off?
Quick answer
The manual for your exact vehicle and outlet is the best guide to whether power should continue after shutdown. Check its power-outlet and Retained Accessory Power (RAP) sections for ignition or ACC/ACCESSORY settings and any door-opening or time conditions. For example, the 2018 Chevrolet Impala manual describes specific outlet behavior under stated conditions; that example does not establish the behavior of other vehicles. [S1]
The question, the details, the next step.
Why does my car's power outlet stop working after I switch the vehicle off? I want to know whether that is normal or whether I should be looking for a problem.
The answer depends on what the manual says about your exact vehicle and outlet. Check the owner’s manual before deciding whether the outlet’s behavior is expected. Look in the contents or index for “power outlets,” “accessory power,” “ACC/ACCESSORY,” or “Retained Accessory Power (RAP).” Read the full section, including notes about doors or elapsed time, rather than relying on a general description of accessory mode.
What details should I match when I look that up? My vehicle has more than one outlet, and I do not want to apply instructions for the wrong one.
Match the manual to the vehicle’s model year, make, and model, then identify the specific outlet location it describes. In a printed manual, use the index; in a digital manual, search relevant terms and check nearby headings and notes so you do not apply wording for a different outlet.
For example, the 2018 Chevrolet Impala manual says the described outlets are powered with the ignition on or in ACC/ACCESSORY, or until the driver’s door is opened within 10 minutes after the vehicle is turned off. It directs readers to the RAP information. This applies to the described outlets in that manual; it does not establish a rule for other vehicles or outlets. [S1]
How can I tell whether the outlet is supposed to stay on briefly after shutdown, or turn off as soon as I switch the car off?
Use the manual’s stated conditions rather than guessing. Note whether the outlet instructions mention ignition position, ACC/ACCESSORY, RAP, a door-opening event, or a time limit. If the outlet section points to RAP, read that section too.
Compare your situation with the exact wording. For instance, the Impala manual’s stated conditions include a driver’s-door opening within 10 minutes; do not apply that timing to your vehicle unless its own manual says so. The cited information describes what that manual says, not the cause of an outlet stopping in a different vehicle. [S1]
What should I do if the manual is unclear, or if the behavior does not match what I read? I would rather not start taking anything apart.
Keep the check non-invasive. Note the vehicle’s year, make, and model; the outlet’s location; the ignition or accessory setting; when you switched the vehicle off; and whether or when you opened a door. Compare those details with the manual’s wording. Do not use a general guide as a reason to disassemble electrical components or work on fuses.
If the manual does not answer your question, ask the vehicle manufacturer’s support channel or a qualified service professional to interpret it for your exact vehicle. You can ask whether that outlet is intended to remain powered after shutdown and which conditions control its shutoff. The manual example alone cannot diagnose a fault in another vehicle.
A practical checklist
Match the manual to the vehicle’s model year, make, and model.
Confirm which outlet the manual section describes.
Check for ignition, ACC/ACCESSORY, RAP, door-opening, and time conditions.
Note the outlet location and the circumstances when it stops working.
Ask for help interpreting the manual if its instructions are unclear.
A few more useful answers
Does the 2018 Chevrolet Impala example apply to other model years?
It should not be assumed to apply. The cited wording is from the 2018 Chevrolet Impala manual and describes the outlets covered there. Check the manual for your own vehicle. [S1]
What does RAP mean in this context?
The Impala manual directs readers to its Retained Accessory Power (RAP) information for related behavior. Consult your own manual for the applicable instructions and conditions. [S1]
What information should I give someone helping me interpret the manual?
Share the vehicle’s year, make, and model, the outlet’s location, the ignition or accessory setting, and what happened before the outlet stopped working. Include the relevant manual wording if available.
Sources
References used for this guide.
- [S1] 2018 Chevrolet Impala Owner’s Manual: Power Outlets chevrolet.com · Checked