April 5, 2026: LEMON Manuals is launched! Read the announcement.

Relay Box Diode & Relay Identification

Fig 1: Relay Box Identification

G50I11740

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)