Relay Box Diode & Relay Identification

Fig 1: Relay Box Identification

Courtesy of GENERAL MOTORS CORP.

• 1 - Light 2 Relay 
• 2 - Fuel Pump Relay 
• 3 - A/C 1 (Compressor Clutch) Relay 
• 4 - ABS Relay 
• 5 - PTC HTR Relay 
• 6 - A/C 2 (Condenser Fan) Relay 
• 7 - DIODE (Daytime Running Lights) 
• 8 - RDTR (Radiator Fan) Relay 
• 9 - ISCA (Idle Speed Control Motor) Relay 
• 10 - Light 1 Relay 
• 11 - Main Relay (FI Relay)