Diagnostic Aids

A solid state relay is used to delay A/C compressor clutch engagement. If vehicle is started with A/C control on and compressor clutch engages immediately, A/C delay relay may be stuck closed or incorrect relay may have been installed.

Fig 1: Chart C-10 Schematic (4.3L (VIN W & Z) "S" & "T" Series A/T & 4.3L (VIN W) "T" Series M/T A/C Compressor Clutch Circuit Diagnosis

Fig 2: Chart C-10 Diagnostic Flow Chart (4.3L (VIN W & Z) "S" & "T" Series A/T & 4.3L (VIN W) "T" Series M/T A/C Compressor Clutch Circuit Diagnosis