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e) Allow the engine to run until the YELLOW  light (C) comes on.  The batteries are now at the voltage level now 
shown on the meter.  To adjust the voltage down, you must apply enough load to bring the voltage of the battery 
down to the pre set 13.8 V., then adjust. 
 
f) Adjust the left  #1 (float voltage) pot as necessary, using the meter.  Your upper and lower voltages are now set.  
Note: The float (lower) voltage can only be adjusted down if the batteries are in a slightly discharged state.   
 
g) The right #3 timer increases time before entering float by clockwise rotation.  Counter clockwise rotation de-
creases time. 
 

Do not force the adjustment pots past their stops. This will void all warrantees on the regulator.  

 
1.  USING THE L.E.D. FOR DIAGNOSTICS: 

a. On the 

ARS III,

 if the YELLOW light (C) comes on first, you have a bad ground or the voltage to the 

brown wire is receiving interference from a solenoid or similar device.  The problem may be solved by add-
ing a 12 volt relay to power up the brown wire from a “clean” 12 volt source, and have the ignition wire acti-
vate this relay. 
NOTE the green LED’s are “voltage activated“ and will light when a shore side battery charger is providing 
voltage at or above voltage set points. 

 

2.  TEST EQUIPMENT:  

a. A good test quality volt meter (preferably digital) 
b. In an emergency, a light bulb can verify power available or a working ground  
c. A battery hydrometer with thermometer 
d. An amp meter (not required but helpful) 
 

3.  GENERAL CHECK OUT PROCEDURE:   

a. Remove and clean all charging system electrical connections (this Includes the ground side). 
Also check the harness for resistance. The wires or terminals may become corroded and need to be 
cleaned or replaced.  
b. Charge all batteries to their proper full charge 
state and determine if they are serviceable.  
c. Check and tighten fan belts. 
 

MOST CHARGING SYSTEM PROBLEMS will be corrected by performing the above checkout.   
COMMON SYSTEM PROBLEMS: 

BAD GROUND SOMEWHERE IN SYSTEM  

*  Poor or dirty battery cable connections 
*  Improper wire size 
*  Loose fan belts 
*  Sulfated or worn out batteries  
*  Failed regulator or harness connections. 
 

27010 12 th Ave. NW, Stanwood  WA.  98292 
(360) 629-6100    FAX  (360) 629-3210 
                                                                                     2/98 

ARS III Side Label 

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