1999 Dodge Caravan rear defogger problem

Tiny
WOR JACKIE
  • MEMBER
  • 1999 DODGE CARAVAN
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 204,509 MILES
My rear defogger is not working, I have checked the voltage on the ground side of the screen and it is 11.5 volts. I need to know which fuse controls the relay and also the location of the relay.

Thanks
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Thursday, November 26th, 2009 AT 9:12 PM

4 Replies

Tiny
CH112063
  • MEMBER
The relay is in a junction box(block) in the left side interior, behind dash. It's protection is under the hood, fuse 27, 40 amp. There are protections in the interior fuse block also. Fuses 9, 6, and 12. 15amp, 20amp, and10amp. Ok
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Friday, November 27th, 2009 AT 3:26 PM
Tiny
WOR JACKIE
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Thanks Joe will give them a try. Many thanks for your help. This is my first time on the forum so now know my way around
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Friday, November 27th, 2009 AT 5:15 PM
Tiny
CH112063
  • MEMBER
Your Welcome
I do think it best for you to use a meter, or 12/6 volt test light, but I'm sure you do. So many fuses are ok, and have no power to them. They make a kit, it is a type of paint, and it matches the grids on the defogger circuit, right on the glass. You tape up the areas you do not want to spread on, and repaint the circuit, just in case the grids go out. With 11.5 volts on the ground side I'm sure you will find the problem now.
I think your thanks should go to 2carpros. Com, Mr. Mike Cerjak, these men have given those with, and those without a place to come when all else fails. Early on, I looked around for a job, I could rely on anywhere. I watched car after car go by. A month later my truck was fixed, and I was in School. It is you, who drive, that I thank as I sit and answer questions, thanks to these men. Good one to you.
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Friday, November 27th, 2009 AT 5:35 PM
Tiny
CARADIODOC
  • EXPERT
Fuses aren't the problem. How do you explain the voltage there? Voltage on the ground side, (both sides), indicates an open ground connection. If you have voltage on only one side, you have the supply and ground sides mixed up in your mind.

No voltage on either side: look at the fuses.

Voltage on both sides: open ground connection

Voltage on one side and 0 volts on the other: proper operation. Every grid line should have around 6 volts in the middle. If 0 or 12 volts, slide the test light or meter along the line until you find where the voltage changes. That's where the break is. Follow ch112063's recommendations for the fix.

Caradiodoc
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Sunday, November 29th, 2009 AT 7:59 PM

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