Pump Switches Faulty - Check Diagnostics/Boom; Pump Switches Locked - Selected Before Aux Power; Pump Switches Locked - Selected Before Footswitch; Pump Switches Locked - Selected Before Start Switch - JLG 1250AJP Troubleshooting Manual

Note Pretest Instructions
1.249.11 Disconnect hyd speed pot
passthru [X199]
1.249.12 Disconnect hyd speed pot
passthru [X199]
1.249.13 Disconnect hyd speed pot
passthru [X199] and plat-
form module J1 [X165]

1.250 PUMP SWITCHES FAULTY - CHECK DIAGNOSTICS/BOOM

Flash Code: 2-3
Pump switches faulty - check diagnostics/boom. A ground control or platform control boom function switch (lower lift, tele-
scope, platform level, platform rotate, jib, etc.) has both directions selected together. This may be caused by a problem with
a switch or its wiring. Run ANALYZER ⇒ SYSTEM TEST from the ground controls and platform controls to find the specific
switch.

1.251 PUMP SWITCHES LOCKED - SELECTED BEFORE AUX POWER

Flash Code: 2-3
Pump switches locked - selected before aux power. A ground function switch input (lower lift, telescope, platform level, plat-
form rotate, jib) was selected before the ground auxiliary power switch input [X004.16]. The auxiliary power (enable) switch
must be activated before the desired function switch. This also may be caused by a problem with a switch or its wiring. Run
ANALYZER ⇒ SYSTEM TEST from the ground controls to find the specific switch.

1.252 PUMP SWITCHES LOCKED - SELECTED BEFORE FOOTSWITCH

Flash Code: 2-3
Pump switches locked - selected before footswitch. A platform boom function switch input (lower lift, telescope, basket level,
basket rotate, jib) was selected before key switch or footswitch input [X169.8] closure. The footswitch must be activated
before any function. This may be caused by a problem with a switch or its wiring. Run ANALYZER ⇒ SYSTEM TEST from the
platform controls to find the specific switch.

1.253 PUMP SWITCHES LOCKED - SELECTED BEFORE START SWITCH

Flash Code: 2-3
Pump switches locked - selected before start switch. A ground control or platform control boom function switch (lower lift,
telescope, platform level, platform rotate, jib, etc.) input was selected before the start switch input [X165.14 X004.4]. The
start switch may only be activated when no function is commanded. This also may be caused by a problem with a switch or
its wiring. Run ANALYZER ⇒ SYSTEM TEST from the ground controls and platform controls to find the specific switch.

1.254 PVG VALVE ENABLE OPEN CIRCUIT

Flash Code: 3-3
PVG valve enable open circuit. The PVG valve enable output [X002.31] is open. See 1.377 COMMON STB OR OC PROCE-
DURE on Pg. 174.
3128411
SECTION 1 - FAULT DICTIONARY AND SELECTED TROUBLESHOOTING
Test
Measure resistance between hyd speed pot
passthru socket 3 [X199.3.soc] and socket 4
[X199.4.soc]. Is there a short?
Measure resistance between hyd speed pot
passthru pin 3[X199.3.pin] and pin 4
[X199.4.pin]. Is there a short?
Measure resistance between hyd speed pot
passthru pin 3[X199.3.pin] and pin 4
[X199.4.pin]. Is there a short?
1250AJP
Result Corrective Action
Yes Repair/replace Speed Controller [X192]
No Keep hyd speed pot passthru [X199] discon-
nected.
Go to step 1.249.12
Yes Keep hyd speed pot passthru [X199] discon-
nected.
Go to step 1.249.13.
No Reprogram/replace platform module
Yes Repair/replace harness between hyd speed pot
passthru pin 3[X199.3.pin] and pin 4
[X199.4.pin]
No Short inside module. Replace platform module.
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