Chevrolet Corvette 1963 Repair & Tune-Up Manual page 301

280 TROUBLESHOOTING
7esf and Procedure
Indications
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N H H B H ^ H i
Note: Tests in Croup 2 are performed with coil high tension lead disconnected to prevent accidental
starting.
2.1—Test the starter motor and sole-
noid: Connect a juniper from the
battery post of the solenoid (or
relay) to the starter post of the
solenoid (or relay).
2.2—Determine whether ignition over-
ride switches are functioning
properly (clutch start switch, neu-
tral safety switch), by connecting a
jumper across the switch(es), and
turning the ignition switch to
"start".
2.3—Check the ignition switch "start"
position: Connect a 12V test lamp
or voltmeter between the starter
post of the solenoid (or relay) and
ground. Turn the ignition switch
to the "start" position, and jiggle
the key.
2.4—Remove and bench test the
starter, according to specifications
in the engine electrical section.
2.5—Determine whether the engine
can turn freely: Remove the spark
plugs, and check for water in the
cylinders. Check for water on the
dipstick, or oil in the radiator. At-
tempt to turn the engine using an
18" flex drive and socket on the
crankshaft pulley nut or bolt.
Section 2—Starting System
See Chapter 3 for service procedures
If starter turns the engine, normally:
If the starter buzzes, or turns the engine very
slowly:
If no response, replace the solenoid (or relay).
If the starter turns, but the engine doesn't,
ensure that the flywheel ring gear is intact. If
the gear
drive.
If starter operates, adjust or replace switch:
If the starter doesn't operate:
If the lamp doesn't light or the meter needle
doesn't move when the switch is turned, check
the ignition switch for loose connections,
cracked insulation, or broken wires. Repair or
replace as necessary:
If the lamp flickers or needle moves when
the key is jiggled, replace the ignition switch.
Checking the ignition switch "start" position
If the starter does not meet specifications,
repair or replace as needed:
If the starter is operating properly:
If the engine will turn freely only with the
spark plugs out, and hydrostatic lock (water in
the cylinders) is ruled out, check valve tim
ing:
If engine will not turn freely, and it is known
that the clutch and transmission are free, the
engine must be disassembled for further eval-
uation:
Results and
is undamaged, replace
Proceed
to
.2.2,
2.4
3.1
the starter
3.1
3.1
' 2.3
3.1 3.3
3.1
2.5
9.2
Chapter
3