TM 5-2420-231-23-1
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Table 1. Multiple Backhoe Operations (Pilot Controls) Do Not Function Correctly - Continued.
073
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Test Step 4. Test for Faulty Pilot
Multiple Backhoe
Control Switch.
Operations (Pilot Controls)
Do Not Function Correctly -
1. Pull pilot control switch (Figure 2,
Continued
Item 1) from right-hand backhoe
tower and disconnect right-hand
backhoe tower wiring harness con-
nector (Figure 2, Item 2) from pilot
control switch.
2. While holding pilot control switch
Resistance 5.0 Ohms or Less -
to on position (TM 5-2420-231-10),
Proceed to step 3.
using a digital multimeter, measure
Resistance Greater Than 5.0 Ohms -
resistance between pilot control
Replace pilot control switch (WP 0189).
switch (WP 0007, Figure 164) ter-
Proceed to Test Step 29.
minals 5 and 6. Resistance should
be 5.0 ohms or less.
3. While pilot control switch is in cen-
Resistance 5.0 Ohms or Less -
ter on position (TM 5-2420-231-
Proceed to Test Step 5.
10), using a digital multimeter,
Resistance Greater Than 5.0 Ohms -
measure resistance between pilot
Replace pilot control switch (WP 0189).
control switch (WP 0007, Figure
Proceed to Test Step 29.
164) terminals 2 and 3. Resistance
should be 5.0 ohms or less.
Figure 2. Pilot Control Switch.
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