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JD 770AH motor grader

J

John Oxley

New Member
Joined
Feb 8, 2017
Messages
1
Location
Wisconsin
Looking for some guidance as to where I can find wiring diagrams/fuse locations for our 770AH motor grader. 1986 model year.
Having trouble tracking down electrical issue with the driving lights (up high on the ROPS cab) no power. No power at wiring behind dash panel. Thanks
 
ovrszd

ovrszd

Senior Member
Joined
Apr 1, 2008
Messages
1,523
Location
Missouri
Occupation
Retired Army
What Brand is this machine? Not familiar with model 770AH.
 
R

rsherril

Senior Member
Joined
May 2, 2009
Messages
264
Location
Far West Colorado
Occupation
Geologist, Retired from teaching sciences
I have found that a 12 V test lamp with alligator clamp to ground and needle nose was helpful in tracing bad connections on my old JD. Generally the issue is with bad grounds or connections between harnesses. Wiggling them might help. Patience and logic required. Work from lights back or switch forward until you see the light. Mine have fuses, so have omh meter to test those.
 
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