TM  10-3930-638-24&P 2-26. ALTERNATOR MAINTENANCE (cont) STEP LOCATION ITEM ACTION REMARKS TESTING  (cont) 15 Operator’s IGNITION switch Place in OFF compartment position 16 Battery  compart- Battery  ground  cable Disconnect Paragraph 2-33b ment, rear of vehicle 17 Engine  compart- Ammeter Connect Between alternator BAT terminal and ment starter relay terminal 3 18 Battery  compart- a. Battery ground Connect Paragraph  2-33b ment, rear of cable vehicle b. Carbon pile Connect Across  batteries 19 Operator’s a. IGNITION switch Place in ON compartment position b. START switch Depress Start and operate engine at 1800 RPM; turn all vehicle lights on to increase load  on  batteries 20 Engine  compart- Ammeter Observe Ammeter should indicate 27 to 47 ment amperes with engine operating at 1800 RPM; if ammeter does not indicate 27 to 40 amperes, replace alternator 21 Operator’s IGNITION switch Place in OFF Turn all vehicle lights off compartment position 22 Battery  compart- a. Battery ground cable Disconnect Paragraph  2-33b ment, rear of vehicle b. Carbon pile Disconnect From batteries 23 Engine compart- Ammeter Disconnect ment 24 Battery  compart-    Battery  ground  cable Connect ment, rear of vehicle Paragraph 2-33b 2-118