New Holland CX720 Repair Manual page 2448

E0164-04-V Supply Ground Spd Hydro Shorted To Low Source
(C.20.B.95.82 - G.30.B.53)
E0164-04 - V Supply Ground Spd Hydro Shorted To Low Source
Cause:
Low battery voltage to CCM2 through the Neutral switch S-22, or the V Supply Ground Spd Hydro circuit is shorted
to a ground.
Possible failure modes:
1. Loose or corroded connections, or damaged wires.
2. Batteries are discharged, and/or alternator/regulator failure.
3. Supply wiring shorted to ground.
4. Controller internal failure (internal regulator failure).
Solution:
1. Key switch in "Off" position. Check fuse F-42.
A. If fuse F-42 is okay, continue with step 3.
B. If the fuse is blown, go to step 2.
2. Replace the failed fuse F-42.
A. If the fuse is okay, continue with step 3.
B. If the fuse immediately fails again, a short to ground exists in wire 010 red to Cab Power Relay K-26 pin
3. Locate short and repair.
3. Key switch in "On" position. Check fuse F-48.
A. If fuse F-48 is okay, continue with step 5.
B. If the fuse is blown, go to step 4.
4. Replace the failed fuse F-48.
A. If the fuse is okay, continue with step 5.
B. If the fuse immediately fails again, a short to ground exists in one of the following wires:
wire 109 orange, fuse F-48 to thresher latching relay K-28, terminal 3
wire 108 orange, fuse F-48 to connector X001, pin 3
switch power wires from splice blocks B, W02 or F, W06 in the RH console
5. Move the multi-function handle (MFH) out of neutral, and observe the fuse F-48.
A. If the fuse is okay, continue with step 6.
B. If the fuse immediately fails, a short to ground exists in wire 113 yellow, neutral switch S-22, pin 2 to CCM2
X015, J1-17. Locate short and repair.
6. Key switch in "Off" position. Check the voltage at fuse F-42 using a multi-meter.
A. If the voltage reading is between 10 - 18 volts, continue with Step 7.
B. If the voltage reading is less than 10 volts, there is excessive resistance between the batteries and the
cab fuse panel, due to loose or corroded connections, or the batteries have discharged excessively, and
are not capable of supplying the minimum voltage requirement for CCM1. Inspect the wiring from the
batteries to the engine compartment, and from there to the cab. Recharge or replace the batteries.
7. Key switch in "On" position. Move the multi-function handle (MFH) out of neutral. Enter the InfoView Monitor -
"Diagnose info" screen.
POWER TRAIN - TRANSMISSION Mechanical
2 4/7/2006
C.20.B / 110