98 ml320 ac cooling fans not working - Mercedes-Benz Forum

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post #1 of 3 (permalink) Old 04-06-2010, 05:11 PM Thread Starter
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98 ml320 ac cooling fans not working

my ac fans do not work , I replaced the pressure switch with no luck also unpluging the pressure switch is the only way my ac will come on. I checked the relay and the fuse and both are good . I put a test light on the 4 wires going to the fan and noticed that all 4 go to ground . Any help would be great .
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post #2 of 3 (permalink) Old 04-09-2010, 02:22 AM
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Can you clarify about "all four go to ground"?

Felicita e un bicchiere di vino con un panino.
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post #3 of 3 (permalink) Old 04-09-2010, 03:59 AM Thread Starter
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I took a test light and hooked to the positive side of the battery and when I probed the four wires all four lit the test light . My intentions were to determine what two wires were the ground wires. The test light was bright , not a dim glow.
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