WACKER Group LTC 4 - Checking Keyswitch and Wiring

Caterpillar Engine Troubleshooting LTC Repair
wc_tx000476gb.fm 80
6.3 Checking Keyswitch and Wiring
See Graphic: wc_gr002463
Electric shock hazard. Only qualified personnel should conduct these
tests.
6.3.1 When troubleshooting CAT engines that do not crank, check that the
Or/B wire (a) is connected to the starter solenoid.
6.3.2 Open the control panel and check that the wiring to the keyswitch is
clean and tight. Check that the appropriate wires are connected to the
proper terminals on the back of the keyswitch.
WARNIN
G
wc_gr00246
3
a
19
17
50
30
A/C
R/Or
R/Or
R
R/B
R/Or Y
Or/B
Or