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Old 06-13-2010, 06:55 AM   #1
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HWH Bypass?

2003 Magna

Can anyone tell me what this switch does? I don't think it was factory. My guess is a previous owner installed it to bypass the automatic ride height but don't really know.

Guesses?
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Old 06-13-2010, 10:35 PM   #2
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The last thing you want to do is bypass the automatic ride height control. SO I don't think it would be that.

The HWH is normally used to level the coach when parked after settling into a parking site. Then once you decide to leave and the coach is at ride height, you will have a "Travel" light lit up to signify that it is OK to drive the coach. Maybe it has something to do with that.

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Old 06-14-2010, 04:00 AM   #3
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It is a possibility that the air dump feature quit working on the jacks and he added a dump air switch energizing the air valve solenoid.
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Old 06-14-2010, 09:07 AM   #4
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I don't have jacks and the air dump works.
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Old 06-14-2010, 12:50 PM   #5
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Got hold of HWH Technical Support (they were very polite) and the official answer is:








It does nothing.
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Old 06-15-2010, 08:31 AM   #6
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I don't know how they can say it does nothing without physically seeing it. I have had problems with the ride height valves on my coach and have learned that you can "manually" adjust the ride height and then remove the #68 fuse (on my coach that is the fuse #) and the coach will stay where you adjusted it to. I have heard of others installing a switch to bypass that fuse, so you would not have to go outside and pull the fuse. I have even thought about installing a switch, if I have any more problems with the HWH.


Quote:
Originally Posted by ThreeDogs View Post
Got hold of HWH Technical Support (they were very polite) and the official answer is:








It does nothing.
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Old 06-15-2010, 11:12 AM   #7
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Quote:
Originally Posted by big jimbo View Post
I don't know how they can say it does nothing without physically seeing it. I have had problems with the ride height valves on my coach and have learned that you can "manually" adjust the ride height and then remove the #68 fuse (on my coach that is the fuse #) and the coach will stay where you adjusted it to. I have heard of others installing a switch to bypass that fuse, so you would not have to go outside and pull the fuse. I have even thought about installing a switch, if I have any more problems with the HWH.
That was my original thought and am not convinced that isn't the case.
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Old 06-15-2010, 05:28 PM   #8
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There is a real easy way to find out.
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Old 07-07-2010, 03:40 PM   #9
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I have a 2001 Magna and had to disable the "Travel" mode of the suspension just this past week. The ride height control air valve blew it's guts out on the right rear. No air valve available, naturally.

In the bay just below the driver is a box with many fuses (three strips worth) and "wire 68" has a 7.5 amp fuse associated with it. Pulling this fuse stops the "Travel" signal which switches air bag control from park to travel (ride height valves) when you dis-engage the air brake. You just ride at whatever you had the bags at in park. You can also manually adjust the bags as you motor on down the road, to your liking.

Now,,I just need to find the part number of the height control valve(s) used on the 2001 Magna. Anybody got a clue?
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Old 07-12-2010, 06:00 PM   #10
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You are correct....the switch is most likely to disable the travel mode so when a ride height valve goes bad, you can still manually level the coach. Otherwise you are stuck in place until valve is replaced.


Hwy23 - Your valve most likely is a Haldex. There should be a label on the side of it with a part number.
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Old 07-13-2010, 10:55 AM   #11
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Via other means, I determined that the valve is indeed made by Haldex, PN KN27000. Being as how it was a holiday weekend (July 4th), I drove from Lordsburg, New Mexico to New Orleans in the "manual" mode. No big problem.

My local NAPA store has the valve, (or one day order). Now to det the durn thing out without MH falling on my head.

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Old 07-13-2010, 11:37 AM   #12
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Has the add on HWH Active Air Suspension been installed?
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Old 07-14-2010, 08:44 AM   #13
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Nope. Looks like a good idea though, assuming it's strong enough. I got it out yesterday. Harder than I thought. My arms needed to be about a foot longer and my belly about 4 inches flatter! And about 20 years younger!

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Old 07-14-2010, 06:36 PM   #14
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In case you do not have the measurements,,,,,
Attached Files
File Type: pdf Rideheightmeasurements.pdf (214.1 KB, 88 views)
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