Sir there is only one DME tuned by two GNS 530 for selection NAV1 and NAV 2 there is sperate switch For indication  both PFD  and Bendix king indicator KDI 574  So first we tune DME   by No.1 GNS 530 there is  No distance and no audio tune heard Sometimes I noticed there is audio tone and no distance on KDI 574 And next step we tune DME by no.2 GNS530 there is distance on both PFD  and Bendix king indicator KDI 574  And audio tune heard  Next step now we Swap GNS 530 with each otherNow swap conditions And next step we tune DME by no.1 GNS530 there is distance on both PFD  and Bendix king indicator KDI 574  And audio tune heard  And we tune DME   by No.2 GNS 530 there is  No distance and no audio tune heard   But after 3/4 power cycle  DME Not showing distance and no audio tone by both GNS 530  Sometimes it show  distance on 1 and 2 selection by GNS 530  But sometimes not This system is only one of our aircraft not in any other so we can’t swap anything from. Another aircraft I don’t understand what to take next step now         

The fact that you're getting DME distance display on both DME displays for both VOR/ILS, I would say this is not a DME issue.

From your prints, the DME indicators feed the Garmin displays.

I'm guessing this is a possible "Mode Display" issue.

If the Garmins have long range navigation, they usually display distance to the next waypoint and not VOR DME data. DME signals from the VOR's are being used, but not displayed. Crews need to know when the next turn is (next waypoint).

The crews normally will select LNAV for long range navigation. LNAV shows waypoint distance. Do the Garmins have a VOR selection for mode? 
  
     
 

New member Krishan. I created a aircraft type section CJ2 for him and added Chapter 34.

From his email:

Now days I am facing DME issue on Our Cessna Cj2. DME installed Bendix king KN63 

That the DME is working when we tune into  VOR it comes on the radio receiver panels only on the Bendex King display and does not show on PFD and MFD.
2. On ILS  the same DME function is displayed on PFD on both pilot and copilot side and the Bendex King display. 

THE DME IS WORKING, unless it is separate for VOR and ILS.
For this thing we replace our KN 63 Interrogator but problem remains same.
And I also attached wiring diagrams....

All wire related issues are in the SWPM.
Standard Wiring Practices Manual.

Which document should I consult for the raceways installation requirements, namely how they are connected to the airframe to provide proper structural integrity as well as path of least impedance for return currents?