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After openning the hood, the evaporator box is the large black plastic box on the passenger side. I used to keep unplugging mine with a wire, but it would just plug up again. From lying under the van I drilled the hole out with a 1/2 inch bit and it has not plugged in years. Be carefull not to drill to far.

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13y ago
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Q: How do you unclog the evaporator drain hose on a 1989 Dodge van?
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