JLG 4017PS Service Manual - Manual (Page 171)

9-13 3706PS, 3707PS, 4014PS, 4017PS, 33.7, 37.6, 37.7
Electrical System
9.7 FUSES AND RELAYS
9.7.1 Engine Compartment
The starter relay (1), AC relay (2), fuel relay (3) are
located on the frame bracket in the engine compartment.
MZ6810
2
1
3
2
3