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Old 12-09-2008, 12:28 PM   #15
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Jet- There is an HWH Schematic for LED's and Fuses on the ACA Tech Library Page under Chassis & Brakes. You can use that to diagnose many problems with the HWH slide & jack system. The printed circuit panel with the LEDs & fuses is located on many coaches behind the small lockable body panel just aft of the RF tire. The circuit panel is in an enclosure with rubber seals; you bend the rubber seals to take the cover off. At least on later models the cover is clear and positioned so you can see the LEDs and fuses with the unlocked body panel off the coach.

This is such a handy reference that I had its two pages laminated back to back and carry it in the coach at all times. E.g. you can tell if the panel has power for the master relay on the pump (LED#14) and whether the panel is calling for that relay to be activated (#13). The fuse schedule indicates which LED is out if the corresponding fuse is blown. FYI. Same reference for the 625 series HWH system found on most Alpine Coaches as for the 625S series on later models (our 08 has the S series, the 06 had the 625).

Baja-tested '08 2-slide 36'
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Old 12-09-2008, 09:03 PM   #16
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On my 2003 (May 2002) the controller is centered under the rails, mounted to the floor of the forward-most bin, behind a carpeted panel. It is located right next to the fresh-water tank's main drain.

My pump, etc. is in the small, lockable panel behind the RF tire, just like the newer ones.

2003 Alpine 40FDTS (400HP)
Long Beach, CA
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Old 12-10-2008, 09:47 AM   #17
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Let me try a word-picture. The system on my coach is a Series 610 and my coach has a build date of 5/98, so here goes. Starting at the entry door. The first removable panel has a clear plastic loop to use for leverage in pulling it out. The next panel to the left is shaped somewhat like a 1/2 circle and is removable one the 1st panel is out. This gives access to (amoung other things) the HWH "brain". This is just to the left of the opening. There are two alumnium boxes, one on top of the other, with the bottom one on the floor. These two boxes look to be about the size of the box of an electric wall switch. There are a mumber of fuses here as well as a circut board.
I don't think this is where the device is that determines what "level" is, but is where that device sends output for telling the controller what to do. It was one of the fuses in this area that got toasted.

Now, there is another fuse box near the right wall that has accessories and there are fuses there as well that are involved in the HWH system, at least that is how it looks.

Hope this helps.

'99 Alpine Coach
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