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Jeep Wrangler YJ
YJ General Discussion
Help with 4WD indicator light
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<blockquote data-quote="DOWNS" data-source="post: 440185" data-attributes="member: 21038"><p>Aftermarket switches and sensors have always been junk, nowadays, they're even worse than before with the parts shortages. It's highly possible you got a bad one. That dropping part you're talking about is called the "air vent filter", it's connected to one leg of your transfer case vacuum switch. Then two of those legs are connected to the two lines going to the front axle and the other is connected to the vacuum source check valve up in the engine bay. </p><p></p><p>Here's the section from the FSM on how to diagnose that system. Follow that flow chart as best you can. When I worked on military aircraft, those of us that could use these types of troubleshooting guides properly were way ahead of the game when it came to working on stuff. The guys who made these manuals know lots of stuff and did lots of R&D on these things.</p><p></p><p>Don't give up, you'll figure it out and your Jeep will remain somewhat as they intended. </p><p></p><p>[ATTACH=full]122150[/ATTACH]</p><p></p><p>[ATTACH=full]122151[/ATTACH]</p><p></p><p>[ATTACH=full]122152[/ATTACH]</p><p></p><p>[ATTACH=full]122153[/ATTACH]</p><p></p><p>[ATTACH=full]122154[/ATTACH]</p></blockquote><p></p>
[QUOTE="DOWNS, post: 440185, member: 21038"] Aftermarket switches and sensors have always been junk, nowadays, they're even worse than before with the parts shortages. It's highly possible you got a bad one. That dropping part you're talking about is called the "air vent filter", it's connected to one leg of your transfer case vacuum switch. Then two of those legs are connected to the two lines going to the front axle and the other is connected to the vacuum source check valve up in the engine bay. Here's the section from the FSM on how to diagnose that system. Follow that flow chart as best you can. When I worked on military aircraft, those of us that could use these types of troubleshooting guides properly were way ahead of the game when it came to working on stuff. The guys who made these manuals know lots of stuff and did lots of R&D on these things. Don't give up, you'll figure it out and your Jeep will remain somewhat as they intended. [ATTACH type="full"]122150[/ATTACH] [ATTACH type="full"]122151[/ATTACH] [ATTACH type="full"]122152[/ATTACH] [ATTACH type="full"]122153[/ATTACH] [ATTACH type="full"]122154[/ATTACH] [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Help with 4WD indicator light
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