1. LOAD
CONTROLLERS
&
LOADS

2. LOAD CONTROLLERS are devices that control power to loads
LOAD CONTROLLERS are devices that control power to loads. Basically, they are switches.

3. LOAD CONTROLLERS
OHMMETER
VOLTMETER
AMMETER
OPEN
CLOSED

4. LOAD CONTROLLERS OHMMETER VOLTMETER AMMETER OPEN X Ω CLOSED
Disconnect power
Isolate component
Set ohmmeter on lowest scale
Reading = Infinite ∞ O.L.
CLOSED

5. LOAD CONTROLLERS OHMMETER VOLTMETER AMMETER OPEN X Ω CLOSED X Ω
Disconnect power
Isolate component
Set ohmmeter on lowest scale
Reading = Infinite ∞ O.L.
CLOSED X Ω
Disconnect power
Isolate component
Set ohmmeter on lowest scale
Reading = ‘0’

6. LOAD CONTROLLERS OHMMETER VOLTMETER AMMETER OPEN X Ω V CLOSED X Ω
Disconnect power
Isolate component
Set ohmmeter on lowest scale
Reading = Infinite ∞ O.L.
Reading = applied voltage
CLOSED X Ω
Disconnect power
Isolate component
Set ohmmeter on lowest scale
Reading = ‘0’

7. LOAD CONTROLLERS OHMMETER VOLTMETER AMMETER OPEN X Ω V CLOSED X Ω V
Disconnect power
Isolate component
Set ohmmeter on lowest scale
Reading = Infinite ∞ O.L.
Reading = applied voltage
CLOSED X Ω V
Disconnect power
Isolate component
Set ohmmeter on lowest scale
Reading = ‘0’
Reading = ‘0’ volts

8. LOAD CONTROLLERS OHMMETER VOLTMETER AMMETER OPEN X Ω V A CLOSED X Ω V
Disconnect power
Isolate component
Set ohmmeter on lowest scale
Reading = Infinite ∞ O.L.
Reading = applied voltage
Reading = ‘0’ amps
CLOSED X Ω V
Disconnect power
Isolate component
Set ohmmeter on lowest scale
Reading = ‘0’
Reading = ‘0’ volts

9. LOAD CONTROLLERS OHMMETER VOLTMETER AMMETER OPEN X Ω V A CLOSED X Ω V
Disconnect power
Isolate component
Set ohmmeter on lowest scale
Reading = Infinite ∞ O.L.
Reading = applied voltage
Reading = ‘0’ amps
CLOSED X Ω V A
Disconnect power
Isolate component
Set ohmmeter on lowest scale
Reading = ‘0’
Reading = ‘0’ volts
Reading = ‘measureable’ amps

10. LOADS are devices that consume power and are basically ‘coils’ of wire.

11. LOADS = Coil OHMMETER VOLTMETER AMMETER Ω OPEN
Ohmmeter on lowest scale
Reading = ∞ = O.L.
SHORTED –
an internal problem

12. LOADS = Coil OHMMETER VOLTMETER AMMETER Ω Ω OPEN
Ohmmeter on lowest scale
Reading = ∞ = O.L.
SHORTED –
an internal problem Ω
Ohmmeter on lowest scale
Reading = ‘0’ or less than
normal

13. LOADS = Coil OHMMETER VOLTMETER AMMETER Ω GROUNDED an external problem
Ohmmeter on highest scale
Reading = any reading is NOT good
GOOD

14. LOADS = Coil OHMMETER VOLTMETER AMMETER Ω GROUNDED an external problem
Ohmmeter on highest scale
Reading = any reading is NOT good
GOOD

15. LOADS = Coil OHMMETER VOLTMETER AMMETER Ω GROUNDED an external problem
GOOD Ω
Ohmmeter on lowest scale
Reading = any reading other than O.L. & ‘0’

16. LOADS = Coil OHMMETER VOLTMETER AMMETER V OPEN SHORTED –
Reading = applied voltage
SHORTED –
an internal problem

17. LOADS = Coil OHMMETER VOLTMETER AMMETER V V OPEN SHORTED –
Reading = applied voltage
SHORTED –
an internal problem V
Short blew fuse:
Reading = ‘0’ voltage

18. LOADS = Coil OHMMETER VOLTMETER AMMETER V GROUNDED an external problem
Grounded blew fuse:
Reading = ‘0’ voltage
GOOD

19. LOADS = Coil OHMMETER VOLTMETER AMMETER V V GROUNDED
an external problem V
Grounded blew fuse:
Reading = ‘0’ voltage
GOOD V
Reading = applied voltage

20. LOADS = Coil OHMMETER VOLTMETER AMMETER A OPEN SHORTED –
Reading = ‘0’ amps
SHORTED –
an internal problem

21. LOADS = Coil OHMMETER VOLTMETER AMMETER A A OPEN SHORTED –
Reading = ‘0’ amps
SHORTED –
an internal problem A
Short blew fuse:
Reading = ‘0’ amp

22. LOADS = Coil OHMMETER VOLTMETER AMMETER A GROUNDED an external problem
Ground blew fuse:
Reading = ‘0’ amp
GOOD

23. LOADS = Coil OHMMETER VOLTMETER AMMETER A A GROUNDED
an external problem A
Ground blew fuse:
Reading = ‘0’ amp
GOOD A
Reading = measureable amps

24. T H E
E N D