JLG 26MRT Service & Maintenance page 53

TROUBLE
No response to a function control switch (cont.)
3120791
Table 3-4. Electrical System Troubleshooting
PROBABLE CAUSE
No voltage present at applicable control
valve coil.
No voltage supplied from terminal strip to
engine start relay.
Defective engine start relay.
No voltage supplied to engine from start
relay.
No voltage present at applicable control
valve coil.
NO TERMINAL STRIPS!!!!!!!! No voltage
supplied from terminal strip to electric
motor start relay.
Defective electric motor start relay.
No voltage supplied to motor from start
relay.
Defective motor/pump assembly.
– JLG Sizzor –
SECTION 3 - TROUBLESHOOTING
REMEDY
Check applicable wire for proper con-
nection at terminal strip, valve harness
plug pin, valve harness receptacle pin
and engine start relay. Using suitable test
meter, perform continuity test on wire.
Repair or replace wire or harness as nec-
essary.
Check applicable wire for proper con-
nection at terminal strip, valve harness
plug pin, valve harness receptacle pin
and engine start relay. Using suitable test
meter, perform continuity test on wire.
Repair or replace wire or harness as nec-
essary.
Replace engine start relay.
Check battery cable from relay to engine
for proper connection or damage. Repair
or replace cable as necessary.
Check applicable wire for proper con-
nection at terminal strip, valve harness
plug pin, valve harness receptacle pin
and valve coil. Using suitable test meter,
perform continuity check on wires.
Repair or replace harness as necessary.
Check applicable wire for proper con-
nection at terminal strip, valve harness
plug pin, valve harness receptacle pin
and electric motor start relay. Using suit-
able test meter, perform continuity test on
wire. Repair or replace wire as necessary.
Replace electric motor start relay.
Check battery cable from relay to motor
for proper connection or damage. Repair
or replace wire as necessary.
Replace motor/pump assembly.
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