1 - common

2 - normally closed

3 - normally open

1-2 coil

3 common

4 N.C.

5 N.O.

diode

(+) anode

(-) cathode

silicon controlled rectifier

anode, cathode, gate (+)

(switchable diode)

transistor

e=emitter

c=collector

b=base

circuit breaker

(note temp symbol)

temp sender

(variable ohm)

alternator

3=3-phase

G=generator

~=AC

+<-=rectified

potentiometer

(sender)