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Jeep Wrangler YJ
YJ General Discussion
Help with 4WD indicator light
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<blockquote data-quote="machoheadgames" data-source="post: 440144" data-attributes="member: 18789"><p>Well, how you think it works is how it’s supposed to work. Vacuum is always applying suction at the axle actuator on one of the two ports. It’s either pulling the fork away from the joint for 2WD, or pulling the fork towards the light switch and the joint for 4WD.</p><p></p><p>The ball in the tcase switch being pressed or not changes which side of the axle actuator has suction. So yes, while blowing on the holes should show you something, not really sure it’s accurate enough for that to be the test method. I would install the switch in the transfer case and see if problem goes away. Make sure the plug goes on right, it and the switch are keyed to encourage you installing it correctly. Vacuum on the wrong ports definitely won’t work right. </p><p></p><p>Again, I think Mopar is a better quality switch than parts stores. And I don’t like the posi locks but if you’re fine with it then that is an acceptable alternative to fix the problem.</p></blockquote><p></p>
[QUOTE="machoheadgames, post: 440144, member: 18789"] Well, how you think it works is how it’s supposed to work. Vacuum is always applying suction at the axle actuator on one of the two ports. It’s either pulling the fork away from the joint for 2WD, or pulling the fork towards the light switch and the joint for 4WD. The ball in the tcase switch being pressed or not changes which side of the axle actuator has suction. So yes, while blowing on the holes should show you something, not really sure it’s accurate enough for that to be the test method. I would install the switch in the transfer case and see if problem goes away. Make sure the plug goes on right, it and the switch are keyed to encourage you installing it correctly. Vacuum on the wrong ports definitely won’t work right. Again, I think Mopar is a better quality switch than parts stores. And I don’t like the posi locks but if you’re fine with it then that is an acceptable alternative to fix the problem. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Help with 4WD indicator light
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