24 VDC IS NOT AVAILABLE AT THE ALTERNATOR <a href="http://armymunitions.tpub.com/MM4812/MM48120045.htm">JUNCTION BOX</a> WHEN HEATER RECEPTACLE AND SWITH IS ON.

TM 3-4230-209-30&P

2-4

TROUBLESHOOTING (CONT)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

5. 24 VDC IS NOT AVAILABLE AT THE ALTERNATOR JUNCTION BOX WHEN HEATER RECEPTACLE AND

SWITCH IS ON.

Step 1. Remove alternator input cable (1) from alternator junction box (2) and check for voltage

between connector and ground.

If voltage is indicated, replace alternator junction box.

If voltage is not indicated, check alternator input cable (1) with multimeter for continu-

ity. If continuity is not indicated, replace alternator input cable (1).

Check for voltage between top of alternator (3) and ground.

Step 2.

If voltage is indicated but system still not working, shut unit down and check ground

lead (4) for continuity. If continuity is not indicated, replace ground lead (4) from

alternator to around on skid base assembly.