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Jeep Wrangler YJ
YJ General Discussion
4WD stopped working on 1987 YJ
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<blockquote data-quote="Flyer58" data-source="post: 439321" data-attributes="member: 18629"><p>Once the vacuum motor on the front axle connects the two halves they'll stay connected until another vacuum line moves them apart.</p><p></p><p>Shift into 4wd and check the continuity of the switch, open circuit or closed, then shift into 2wd and check it. The motor does not need to be running. Just check if the switch is making contact. Could be a burned out light too.</p><p> It doesn't take much to remove the vacuum motor to see if it's working with a vacuum.</p></blockquote><p></p>
[QUOTE="Flyer58, post: 439321, member: 18629"] Once the vacuum motor on the front axle connects the two halves they'll stay connected until another vacuum line moves them apart. Shift into 4wd and check the continuity of the switch, open circuit or closed, then shift into 2wd and check it. The motor does not need to be running. Just check if the switch is making contact. Could be a burned out light too. It doesn't take much to remove the vacuum motor to see if it's working with a vacuum. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
4WD stopped working on 1987 YJ
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