Alamo MACHETE Product Service Manual page 60

TROUBLE SHOOTING - TESTING
JOYSTICK - WIRING HARNESS TEST:
1.
Perform this Test when Isolation Test 1, Isolation Test 2 and Solenoid Valve
Test have been Completed and indicates that the cause of an inoperative or
intermittent complaint is located in the Joystick or Harness.
2.
A Handy TIP to make a tester is shown in Figure 19, To make this tool use a
discarded Plug (or purchase one Locally) and wire a 12 volt bulb into it, If doing
a lot of testing might want to consider making one for each connection. By
making this type tester you will be able to test the positive (+) and negative (-)
connection at the same time and this would allow the test to be performed by
one person and decrease the chance of making a connection wrong. A normal
12 volt test Light can be used as shown in Figure 23, but this method normally
requires two people to perform and Test Light Must be connected correctly.
3.
Disconnect the Wiring Harness Connector at Valve for the inoperative Circuit
at the Valve Solenoid Connection.
4.
Connect the Test Tool you built (or 12 Test light) to the Harness end of the connector,
(If using a test light to check a positive (+) connection be sure to ground Test Light to a
good ground connection, if testing a Negative (-) connection it would be required to
reverse the + to - Connection. (See Figure 22)
5.
While actuating the Joystick, Test for voltage at the connect (if using Tool you
Built the Bulb should light up or test light should light up). If test light comes on
then this circuit is OK, If using a normal Test Light see Figure 23 both sides of
connection will need to be tested; this may require an assistant
(Connection for Testing Positive (+) Side Shown Below)
+
-
+
-
+
-
Machete (Service Manual) 04/04
© 2004 Alamo Group Inc.
(See Figure 22 & 23) Old Style Valve testing
Swing
Lift
Dipper
60
FIGURE 22
TO
WIRING
HARNESS
FIGURE 23