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When the RPM's get to a certain range several electrical issues occur

Tiny
COMPUTERBLUE
  • MEMBER
  • 2003 JEEP LIBERTY
  • 3.7L
  • V6
  • 2WD
  • AUTOMATIC
  • 115,000 MILES
When the rpm's get to a certain range the headlights get brighter, the A/C blasts harder, the speakers crackle and the dash dials shuts off. In the past, the headlights have blown out from this. The battery and alternator are working properly. Please help. Thank you.
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Sunday, June 23rd, 2019 AT 9:28 PM

3 Replies

Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,
This sounds like you could have a problem with your vehicle's voltage regulator. The voltage regulator, or for your vehicle Electronic Voltage Regulator (EVR) circuitry is located within your vehicle's Power-train Control Module (PCM) or "computer". Your PCM may be faulty and causing this problem and may need to be replaced. Please get back to us with what you find out.

Thanks,
Alex
2carPros
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Monday, June 24th, 2019 AT 11:22 AM
Tiny
COMPUTERBLUE
  • MEMBER
  • 2 POSTS
Thank you. I will get back to you with what I find.
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Monday, June 24th, 2019 AT 2:58 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,960 POSTS
Please let us know what you find. We are interested to see what it is.
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Thursday, June 27th, 2019 AT 12:37 PM

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