Power cutting out

2003 MERCURY SABLE
143,000 MILES
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KEVIN HARRISON2
  • MEMBER
  • 1 POST
my car is having power outages. it cranked fine. but after i turn engine off it's acting like there is no power. nothing works even the auto door lock switch isn't working. it has a new battery and the alternator was replaced about 5 months ago. started was replaced a year ago. it acts like there is no battery in it. i pulled and replaced the ignition relay and it started and ran fine but as soon as i turn it off it wouldn't start again.
Nov 10, 2019 at 4:07 PM
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94 TRANSAM
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 680 POSTS
Hello,

It sounds like you either have one or 2 bad battery cables or a bad connection on one or both. Have you ohms checked the cables?

Here is a guide to help you do so if you haven't done it:

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

Rich
Nov 10, 2019 at 10:11 PM
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