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Why are there 2 vacuum lines from the engine to the front axle shift motor switch when only 1 is needed on my 1993 jeep YJ?
Wiki User
∙ 13y ago
vacuum is needed to perform both actions of the diaphram, pulling to engage the 4wd and pushing to disengage it.
One is also there to light the 4wd indicator on your dash, it is the one that tracks to the passengers side firewall.
Wiki User
∙ 13y ago
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