
Wiring the Lock to Mighty Mule 500/502 and GTO/PRO 
Gate Opener Control Boards
Lock Board
Wiring Chart
500/502 and 3000/4000 Control Board
  | STALL FORCE  | 
SWITCH  | 
  | 
N  | M  | 
I  | A  | 
M  | X  | 
12 Volt Battery
Double Spade
Tongue Connectors
* Place a dab of petroleum jelly on the terminal con- tacts to prevent corrosion.
Lock Board
GRN  | WHT  | BLUE  | BRN  | ORG  | RED  | BLK  | COM  | COM  | 
  | SAFETY  | 
  | SHADOW LOOP  | 
  | 
  | GRN  | BLK  | RED  | 
GRN  | WHT  | MASTER INPUTS  | RED | BLK | 
  | 
  | CYCLE CLOSE  | 
  | CLOSE EDGE  | 
  | RECEIVER  | ||||||
BLUE  | BRN  | ORG  | 
  | 
  | EXIT/ OPEN  | OPEN EDGE  | 
  | 
  | 
  | ||||||||
Time Adj
WHITE Wire to Operator Board Master Operator RED Terminal
1 2 3 4 5
RED Wire To Battery
Positive (+) Terminal
MASTER OPERATOR
POWER CABLE
BLACK Wire To Battery
Negative 
BLACK Wire From Lock
RED Wire From Lock
NOTE: For 
Manual Lock Release:
The GTO Automatic Gate Lock is keyed for manual release. Should the electronic release be disabled for any reason, simply use the key to manually open the lock.
9