The relay on the car says klima 6zyl .How would this vary from a 4 cyl or a 8cyl one. A RPM cut-off for the compressor?

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Yes, how it looks at the engine RPM will be different.

-J

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Thanks . I wasn't clear on that Any way to check a relay itself at the pins.
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KLIMA Basics missing from this forum
KLIMA Basics missing from this forum - PeachParts Mercedes ShopForum

Klima > Ice Cube - Not Working "1987 300TD"
Klima > Ice Cube - Not Working - PeachParts Mercedes ShopForum



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