Home Auto Repair 1995 Chevrolet Tahoe A/C Heater System Removal & Installation

1995 Chevrolet Tahoe A/C Heater System Removal & Installation

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Download PLEASE READ THIS FIRST * NOTE: Before performing trouble shooting procedures, ensure A/C-heater fuse is not blown. A/C COMPRESSOR INOPERATIVE NOTE: To properly diagnose system, outside temperature must be greater than 60 F (16 C). 1) Turn ignition on. Place blower switch in HI position. Using DVOM, measure voltage at A/C-heater control module connector Light Green wire. If voltage is not present, go to next step. If battery voltage is present, go to step 3). 2) Using DVOM, check continuity of White wire between A/C-heater control module connector and ground. If continuity exists, replace A/C-heater control module. If continuity does not exist, repair open White wire between A/C-heater control module connector and ground. If wire is okay, replace water valve. 3) Using DVOM, measure voltage at A/C compressor clutch relay connector Light Green wire (located under instrument panel, on A/C-heater assembly case). If battery voltage is present, go to next step. If voltage is not present, repair open Light Green wire between A/C compressor clutch relay connector and A/C-heater control module connector. 4) Using DVOM, check continuity of Black wire between A/C compressor clutch relay connector and ground. If continuity exists, go to next step. If continuity does not exist, repair open Black wire between A/C compressor clutch relay connector and ground. 5) Check continuity of Light Blue wire between A/C compressor clutch relay connector and A/C high pressure cut-out switch connector