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When I turn rear window defroster, the gauges go off and I get a battery not charging light

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You probably have a ground problems
find out witch ground is common between window defroster,gauges and battery charging system.
hope it helps

Posted on Mar 20, 2014

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2002 dodge intrepid the rear defrost button light is always on my car battery wouldnt stay charged so I took the defrost relay out the light is still on but my car stayed charged next day no charge


Dear Deseree,
I would like to suggest you are on the right track.
Next, try to find the fuse for the rear defroster, and try pulling that. That light may be a lit because of the "instruments" fuse, and if you pull that one, your instruments may stop working.
Fuses are both under the dashboard and also in a black plastic box under the hood of the car near a fender.
I might suggest there are 3 more common things that can cause the battery to drain.
1) a short in the alternator can cause this problem.
2) a short in the ignition switch, and
3) a short in the computer itself.
God bless your efforts.

Jun 30, 2016 | 2002 Dodge Intrepid

1 Answer

When i turn on rear defroster the gauges go off and I get battery not charging light.


check your battery condition if this is good, probabley major short cirq.in power supply to rear window or bad ground

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The Alternator may not be charging at the proper level. If the car is running while you're trying to open the sunroof or turn on the defroster, then the battery light has nothing to do with those and they are separate problems. Have an ASE Certified mechanic check the charging system.

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Drive over to Autozone or Oreillys and have them check the charging system while it is running. You also need to check for the "draw" of power used by the car. They may not have the gauges for that portion of the test.
One item that is silent and draws a lot of power is the rear window defroster. I don't know offhand if it is a dedicated fuse or if there are several items on the same fuse. You could try pulling the fuse for the rear window defroster.
Your air suspension can draw lots of power if the air compressor keeps running.

If you are running down a fully charged battery and all the power of an alternator, something is either glowing, or a fusible link is blown and the charge is not getting to the battery.

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replace the positive battery cable, trust me on this one have done dozens of 91 and 92's.

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hopefully this will help, there is a fuse box under the back seat the one closest to the battery, there you will find that there are 2 fuses for the rear defrost try checking those out

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