TM 9-2320-209-34-2-3 (2) Testing set-up. FRAME 1 1. Mount heater assembly (1) on test stand (2). 2. Connect coolant inlet hose (3) and outlet hose (4) to heater (1). Connect exhaust pipe (5). 3. Connect fuel supply line (6) to fuel inlet fitting (7). 4. Connect wiring harness (8) to electrical connector (9). GO TO FRAME 2 1 21-9