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Battery will not connect to the  Battery circuit-breaker open.  Close the circuit-breaker. 
main bus or essential bus.  Battery circuit-breaker defective. Battery relay defective. ALT/BAT switch defective. Battery system wiring defective.  Replace the circuit-breaker. Refer to Section 24-60. Replace the battery relay. Replace the ALT/BAT switch. Do a test of the battery system wiring. Refer to Chapter 92 for the wiring diagrams. 
Load meter shows zero at all times.  Defective ammeter indicator. Defective ammeter transducer.  Refer to the VM1000 integrated engine indicator manual. Replace the transducer. 
Voltmeter shows zero at all times.  Defective voltmeter. Defective wiring in the voltmeter system.  Refer to the VM1000 integrated engine indicator manual. Do a test of the wiring. Refer to Chapter 92 for the wiring diagrams. 

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Electrical Power
AMM

Maintenance Practices
1. General
Keep the battery clean. Remove grease and other contaminants from the battery case. Remove dirt from the area of the terminals. Protect the terminals and cable lugs with Dow Corning compound 4 (DC4).
If you do not use the airplane regularly you must remove the battery for charging.
CAUTION:  INSTALL ONLY A BATTERY WHICH IS APPROVED BY THE AIRPLANE MANUFACTURER.
2. Safety Precautions
Wear protective clothing when you work on the battery(rubber apron, rubber gloves and goggles).
If you get acid on you, apply a solution of sodium bicarbonate and water to the area. Then flush with
large quantities of water. Get medical attention as soon as possible.
If you get acid in or near your eyes, flush with large quantities of water and an eye-wash solution. Get

medical attention immediately.
Obey the maintenance instructions of the battery manufacturer.
Always disconnect the battery when you do work on the electrical system. Disconnect the negative

cable first. Connect the negative cable last.

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3. Remove/Install the Battery
A. Remove the Battery from the Airplane
Detail Steps/Work Items  Key Items/References 
(1)  Remove the engine cowlings.  Refer to Section 71-10. 
(2)  Disconnect the negative cable from the battery. 
(3)  Disconnect the positive cable from the battery. 
(4)  Disconnect the vent hose from the battery. 
(5)  Remove the battery retaining clamp: S Remove the 2 nuts and washers from clamp. S Lift the clamp clear of the retaining studs. 
(6)  Remove the battery from the airplane. 

B. Install the Battery in the Airplane
Detail Steps/Work Items  Key Items/References 
(1)  Make sure that the battery is clean and dry. 
(2)  Move the battery into position in the battery mount. 
(3)  Install the battery retaining clamp: S Put the battery retaining clamp into position over the retaining studs and on the battery. S Install the 2 washers and nuts onto the retaining studs.  Make sure that the clamp is seated correctly. Tighten the nuts down evenly. 
(4)  Tighten the 2 retaining nuts.  Torque 1.6 Nm (1.18 ft.lb) 
(5)  Connect the vent hose to the battery. 
CAUTION: MAKE SURE THAT YOU CONNECT THE CABLES TO THE CORRECT TERMINALS. INCORRECT CONNECTION CAN DAMAGE THE ELECTRICAL AND AVIONIC SYSTEMS. 
(6)  Connect the positive cable to the battery.  Apply Dow Corning compound (DC4) to the battery terminal and the cable lug. 
(7)  Connect the negative cable to the battery.  Apply Dow Corning compound (DC4) to the battery terminal and the cable lug. 
　
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