06allegrobay
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Need Workhorse W24 Chassis wiring diagram for dash AC
Trying to find a diagram that will show where the 12V from the interior Denso Heat/Cooling Unit Magnetic Clutch Relay output pin 12a (black/white) goes to on the Workhorse side of a W24 chassis (2006 Allegrobay). The Tiffin service Tech told me the 12V is sent to the Workhorse side to initiate turning the compressor on. The compressor clutch relay in the fuse/relay center under the hood has 12V on one side of coil when the ignition is turned on and the AC switch on the dash is off so this is not the same 12V coming from the Denso unit inside. Need a ground to other side of coil for relay to pick. The 12V from inside must pick another relay under the hood(?) that applies the ground to the clutch relay coil. I can make the AC work if I remove the clutch relay and bridge the contacts on the fuse panel. That tells me that most of the items related to Freon and compressor are OK. Hi and Lo pressure sensors are inop when forcing compressor on. Anyone got a wiring diagram or can lead me to one?? Thanks for any help...............1.4KViews0likes3CommentsRe: Dash Air Not Working
Yes the system has the proper amount of R134A - low pressure switch is ok (closed). Have yet to test the high pressure switch. Going back to the schematic - this is a Denso wiring diagram I got by getting the part number off the dash control and searching the web. The schematic is for the interior heat/cooling unit inside the cockpit. According to Tiffin AC service tech the Denso unit sends a 12V signal (the output of the "Magnetic Clutch Relay" pin 3 at top of page) to the Workhorse chassis. I believe the part shown to the right of the label "Light Switch" is a generic destination since Denso doesn't know what vehicle their unit is installed in. Under the hood the diagram in the cover of the fuse center shows a 10A fuse labeled "Comp" and a relay labeled "Comp". This fuse and relay feed the compressor clutch. When I depress the AC ON button on the control panel it applies 12V to one side of the coil and to the contacts. All I need is a ground to the other side of the coil - this must come from Workhorse installed sensors like the Hi and Low pressures switch's. As a retired EE I have 48 years electrical experience and I am EPA certified in HVAC including mobile - but without a schematic for the Workhorse side I am flying blind. Since there is protection for pressure and temperature in the Denso unit I think I can safely permanently ground the relay coil under the hood and forget figuring out what it should be..............500Views0likes0CommentsRe: Dash Air Not Working
Westend: Thanks for the reply - Yes this is the correct schematic for my MH. There are no WH service centers nearby. Tiffin no longer takes appointments. You have to go to Red Bay where it is first come first served. You could sit in their campsite for several days before even being called. Since 12V is present on one side of clutch relay coil (the one I can short across and get compressor to come on) all I need is a ground on the other side. The schematic shows the destination of the 12V from the interior unit to the right of "Light Switch" on right side of drawing. Don't know what that is and where it is.504Views0likes0CommentsDash Air Not Working
I have a 2006 Tiffin Allegro Bay on a Workhorse W24 chassis. The dash air will not come on. Local shop determined that the relay under the hood that pulls in the compressor clutch was not working. The coil has 12V on one side but no ground on the other. Used a test relay that can short across the contacts and send 12V to compressor clutch and everything works OK. Managed to get wiring diagrams for the dash control unit and the inside heating/cooling unit but cannot find anything for the chassis side. The drawing on page 36 of Denso LA990009-2492 shows 12V leaving the interior heating/cooling unit and going to a either a relay or the compressor clutch. Cannot find what the device is. Tiffin says they send 12V to Workhorse and they take it from there (everything on right side of drawing and dotted is the Workhorse hardware). This seems to be working since I measure 12V on one side of the coil under the hood when I push in the AC ON button on the dash. Need to find out where the ground for the relay comes from. I suspect the High and Low pressure switch's but have yet to verify that. Has anyone got a Workhorse wiring diagram that shows where the ground comes from?? Thanks for any help you can supply................1.6KViews0likes6CommentsRe: Ford Edge
Have a 2013 Lincoln MKX with keyless ignition similar to the Ford Edge. When using a tow dolly on the Edge I used the seat belt to anchor the steering wheel and broke the lower spoke on the steering wheel - what other ways are there to anchor the steering wheel when using a tow dolly??467Views0likes0CommentsRe: Locked or Unlocked?
I have a 2011 Ford Edge with keyless ignition. I was advised to lock the steering wheel using the seat belt. I thread the seat belt into the opening at the bottom of the steering wheel before locking it then move the power seat back to take out the slack. On my last trip when I went to remove the belt I noticed it had pulled the steering wheel down so far it cracked both sides of the spokes that connect to the outer wheel. Is there any other way to lock the wheels without tie'ing the steering wheel??105Views0likes0Comments
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