I've been having problems for a long time with my passenger carpet getting wet in my truck. After it rains the passenger only is soaked. And I seen this and took the panel off under the hood. It's clean. The drains well they are full of sand. I kept pouring water through the cowl and stuck a screw driver in the hole and moved it around and a lot of the sand came out. But only water came out on the driver side. The passenger side drain was dry. Is it supposed to drain out both sides? Or just the driver. I'm confused.

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1997 B2300 reg cab 2.3 Lima, 15x8.5 Mickey Thompson classic 2, 31x10.50 cooper discover at3, 7.5 open 4.10 rear, dynomax super turbo catback, alpine iva-w200 w/ nav, kicker 6x8s, alpine type R 8, alpine 250W mono amp, power bass 400.4, tool box & camper shell, compustar alarm/remote start.
1956 Ford F100 rust bucket with big plans!