When I turn my headlights on the motor loses power and the cruise control stops working?

2011 KIA SPORTAGE
101,000 MILES • 2.4L • AUTOMATIC
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JANICELOWE
If I let off the gas and then give it gas again it runs fine, but the cruise control will not start back unless I turn the headlights off.
May 18, 2023 at 5:14 PM
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STRAILER
  • ✓ASE Certified Mechanic
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It sounds like the alternator is weak on recharging the system but to be sure here is a guide to help and I have included how to change the alternator out in the images below.

https://www.2carpros.com/articles/how-to-check-a-car-alternator


Check out the images (below). Please let us know if you need anything else to get the problem fixed.

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May 19, 2023 at 11:37 AM
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JANICELOWE
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Thank you for your reply. The alternator has already been checked and it is good.
May 19, 2023 at 11:49 AM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,503 POSTS
  • ASE Certified Mechanic
With the engine running and the headlights on, let's check the voltage at the battery. Here is a guide that will help, the voltage should be about 13.5 volts:

https://www.2carpros.com/articles/how-to-use-a-voltmeter

Please go over this guide and get back to us.
May 20, 2023 at 2:25 PM
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