Where would you look for 5th wheel landing gear switch?

   / Where would you look for 5th wheel landing gear switch? #1  
R

RobertN

Super Member
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Apr 6, 2000
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8,658
Location
Shingle Springs California
Tractor
New Holland TC40D
Where would you look for 5th wheel landing gear switch? My 5th wheel has the external switch on a panel, that has an extend/retract switch and a second keyed switch as a lockout.

Tried google, but only came up with single switch.

Last weekend, was all set to take the 5th wheel on a short trip. Backed up to it, went to lower it, and nothing... The switch had been intermittent before; usually jiggling it would get it to work.

Still went out; I know my manual handle that is usually stored, works...
 
   / Where would you look for 5th wheel landing gear switch? #2  
Sounds to me as if it would be one of 3 possible problems:
1) switch gone bad, possibly due to corrosion,
2) a loose connection somewhere, or
3) blown fuse, but I doubt this one since it had worked intermittently before.

But of course my experience is dated, so I guess you can take it with a grain of salt.:laughing:
 
   / Where would you look for 5th wheel landing gear switch?
  • Thread Starter
#3  
Fuse is good. Going to poke around checking voltages tonight. I think it is the switch...

Going to get an oscilloscope out tonight and check waveforms on the inputs/outputs. Well, OK, maybe just my DMM :D
 
   / Where would you look for 5th wheel landing gear switch? #4  
If you have an RV dealer nearby they might be able to help you locate the right switch.

It sounds like one of a few things could be happening:
-poor ground(corrosion at ground connection)- do you have any other 12V devices not working?
-corrosion in the switch itself
-poor connection at either the switch or the jack motor
 
   / Where would you look for 5th wheel landing gear switch?
  • Thread Starter
#5  
Everything else(12V) on the wheel works great. I had a bad ground issue a couple years ago; nothing worked till I fixed that.

The switch is on the exterior; I'm suspecting it.
 
   / Where would you look for 5th wheel landing gear switch?
  • Thread Starter
#9  
Here is the panel. I have power to the switch.
20150509_153811.jpg
 
   / Where would you look for 5th wheel landing gear switch? #10  
If you have power to the switch, all you need to do is replace switch with a radio shack double pole toggle switch. Those ore on off on switches. Any electrical supply house will also sell them.
 
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