JLG X20JP - X600AJ Service Manual - Manual (Page 88)

SECTION 3 - CHASSIS & TURNTABLE
3-64 – JLG Lift – 3121623
FUSE
1. Check for. a blown fuse; replace if necessary.
2. If the replaced fuse blows out, check the following.
30A FUSE:
a. Check the combination switch.
b. Check the wire harness connecting the combi-
nation switch and ECM (Bl/Y) for open or short
circuit.
c. Check the rectifier or regulator rectifier.
3A FUSE:
d. Check the combination switch.
e. Check the wire harness connecting the combi-
nation swatch and ECM (BI/Y) for open or short
circuit.