TM   5-4520-253-13 TEST   PC   BOARD   ASSEMBLY   (CONT) Table 4-3. PC Board Testing (6) Meter Indi- cation (1) Component Circuit (2) (3) Test  For/ Meter Setting (4) (5) Probe No. 2 Ground Ground Yellow  Wires (6, 7) Yellow  Wires (6, 7) Violet   Wire (5) Terminal  C Ground Ground Ground Probe No. 1 Heater  Mode CIRCUIT    BREAKER Power Cable: Plugged Voltage Black Wire (1) 110Vac CIRCUIT    BREAKER Power  Cable: Voltage Brown Wires Plugged (2, 3) Power Cable: Resistance Violet  Wires Unplugged R x 1 (4, 5) Power  Cable: Resistance Grey Wire Unplugged R x 1 0 (8) 110Vac RESET   Circuit Breaker Zero  re- sistance 650 Ohms RESET   Circuit Breaker ROOM   THERMO Receptacle Power Cable: Plugged Voltage Orange  Wire (9) Terminal   A 110Vac 110Vac HEATER-OFF-FAN Switch:   OFF Power Cable: Plugged HEATER-OFF-FAN Switch:   FAN Power Cable: Plugged 110Vac HEATER-OFF-FAN Power  Cable: Voltage Orange  Wires Switch:   HEATER Plugged (9,11,12) HEATER-OFF-FAN Power Cable: Voltage Red  Wire Switch:   OFF Plugged (lo) HEATER-OFF-FAN Power Cable: Voltage Orange Wires Switch:   OFF Plugged (9,11,12) HEAT   Indicator Power Cable: Voltage Orange  Wire Light   (White) Plugged (12) FAULT    Indicator Power  Cable: Voltage Violet   Wire 110Vac Ground Zero V ac Ground White  Wire (13) Zero V ac 110Vac Yellow  Wire (7) 110Vac Light  (Red) I   Plugged (4) HEATER-OFF- FAN   Switch: HEATER Heater in FAULT   mode. (To cause FAULT   mode, disconnect  fuel solenoid.) 4-28 Change 2