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Message: [QUOTE="getstuk, post: 1172048, member: 12375"] Ok found the problem! Found a very simple way to test your vacuum lines and your solenoid, all at once and in just a couple minutes! Assuming your vacuum pump is working (you'll hear it turn on as soon as you disconnect a "live" vacuum line), simply disconnect the vacuum line that comes directly from the pump and goes INTO your solenoid, and plug the vacuum pump line directly into the upstream vacuum line that's headed to your hubs. Check my video for how to do this in detail. This will completely bypass the electronics of the 4wd system and apply direct vacuum to your hubs. If you have no leaks in the vacuum lines that go out to your hubs from the solenoid, then the vacuum pump should shut off in under 45 seconds. If the vacuum hub continues to run for over a minute, you have a vacuum leak in your lines, but test whether your hubs are engaged by jacking up the front tires and spinning one tire with 4hi engaged. Your passenger tire and driver side tires should both spin together now (but in opposite directions if you have an open diff). If your hubs are not locked, and each tire spins independently of each other, then your hubs are unlocked and you have a vacuum leak or your vacuum pump is not functioning (this should be very obvious if it's not, test the vacuum with your finger over an active line, it should suck air). My problem is the solenoid, thanks guys for your help. I'll update this thread when I've replaced it...looking for the part online now. <uploading video now> [/QUOTE]

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