Alarm driving me nuts!!

[redryder]

On my 04 Diplomat I suspected a low air switch problem, but now I'm not sure. After the air has built up I release the parking brake put the trans in R back out of storage with no alarms, put it into D with no alarms put it into N and set the parking brake, let her idle for awhile put her into D or R alarms sounds, now after driving 5 to 10 miles the alarm goes off and does not sound again until I stop put her into N let her idle for a while before shutting down. Start back up put her in D or R the alarm sounds again until driving for 5 to 10 miles. Now I suspect something to do with the trans maybe a temp switch? I must mention no warning lights on the dash.

[oldnotdead]

Check for slow leak. High idle speed before driving may keep enough pressure until you idle it again?
OND

[Mike Canter]

Dan, if you have a tranny fault then you would have a trouble code in the for the transmission and most likely a warning light on the dash. With the key on and engine off go to the transmission keypad and push both the up and down arrows at the same time. The first thing to come up is the electronic fluid level which with a cold transmission will show a fault but you don't care. Now push the up and the down shift arrows again at the same time. Now the fault codes will start appearing. Write the code down and if the red LED for the Economy mode is on then push the mode button to read the next code. Keep doing that until you have all the codes.


You never said that you were monitoring the air tank gauges. With the motor running are both needles up around the 120-130 range? When the alarm sounds are the needles still up there or have they dropped?

[Robert T]

Easy fix, been ther done it , had same problem. It is the swith under the park brake switch. Take console off , under side of switch is a sensor, Cost about $50.00

park brake switch
Nason Company
P/N: SM-1C-66R/WP28
1307 S. Highway 11
Order from one of the following Nason Distributors
Walhalla, SC 29691
Cross Company 866-219-8217
800-229-4955
Sunsource 800-228-5800
http://www.nasonptc.com/
Flow Dynamics 205-581-1200
Hydraulic Energy Products 800-800-3471
Fluid Power Equipment Co., 877-471-8999

[redryder]

Thanks Mike, I'll check the Trans codes, this will be a new experience for me. And I did forget to mention that Both needles on air pressure gage are and stay around 120 or above.

[YC1]

Just one more twist. If you have hydraulic jacks they might be low on fluid. Mine drives me crazy if it is a bit low. It seems to think the jacks are down.

[Rex]

Dan, Robert T gave you the most likely answer. That pressure switch is known to fail and when it does it acts exactly like what you are describing. Easy fix. Also when it fails it is intermittent.

[Diplomat Don]

Dan...x3 on the brake switch is bad. Here is a way to check. Next time the alarm is sounding, stop, place in neutral and pull the parking brake on. Release the brake by pushing down quick and firm. Put it in gear and the alarm should have stopped.

[rpasetto]

redryder, if your air gauge is reading up around 120, and you're getting an alarm it could be something else, probably jacks. Check fluid in the hydraulic jack reservoir if tests on the brake switch sensor turns out OK.

[nodine]

Not sure what brought this back to the top but Dan's last post was May 20. Sure hope he has not pulled his hair out by now and has it fixed.

Bob

[redryder]

Thank you all for your inputs, I have installed a new switch but have not really tried it out yet. We have had illness and death, so these last few months have been pretty hectic.
so thank you all.

Dan

[BigBirdLulu]

Any special instructions for replacing the switch?

[BigBirdLulu]

Additional query: one reply mentioned a switch and a sensor - are they one and the same or separate parts?

[Diplomat Don]

BigBirdLuLu........The sensor is an electric sensor attached to the bottom of the Parking Brake switch (pliunger you push to release parking brake). It screws into the switch and is a separate item. You can only get it from Monaco. Call them with your coach number and they'll send you one. About $50.00 shipped to your door.