4. Inspect Driver Side Junction Block Circuit
WARNING: This page is about a different car, the 2003 Lexus GS 430 and 2003 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
- Remove the fuse from the junction block and inspect the connector on junction block side.SPECIFIED CONDITION
Fuse Tester connection Condition Specified condition AM1 1-Ground Constant Battery positive voltage WASHER 3-Ground Ignition switch ON Battery positive voltage FOG 5-Ground Constant Battery positive voltage TAIL 7-Ground Light control switch TAIL or HEAD Battery positive voltage GAUGE 11-Ground Ignition switch ON Battery positive voltage FUEL OPN 13-Ground Constant Battery positive voltage PANEL 17-Ground Light control switch TAIL or HEAD Battery positive voltage HEATER 19-Ground Ignition switch ON Battery positive voltage SRS-B 21-Ground Constant Battery positive voltage DP/SEAT 23-Ground Constant Battery positive voltage RADIO NO.2 25-Ground Ignition switch ACC or ON Battery positive voltage WIPER 27-Ground Ignition switch ON Battery positive voltage OBD 29-Ground Constant Battery positive voltage STOP 31-Ground Constant Battery positive voltage CIG 33-Ground Ignition switch ACC or ON Battery positive voltage ECU-IG 35-Ground Ignition switch ON Battery positive voltage ST 37-Ground Ignition switch ON Battery positive voltage IGN 39-Ground Ignition switch ON Battery positive voltage D RR DOOR 41-Ground Constant Battery positive voltage If the circuit is not as specified, inspect the circuits connected to other parts.
- Remove the relay from the junction block and inspect the connector on junction block side.SPECIFIED CONDITION
Relay Tester connection Condition Specified condition Fog light 43-Ground Constant Battery positive voltage Fog light 44-Ground Constant Continuity Fog light 46-Ground Light control switch HEAD Battery positive voltage Taillight 47-Ground Constant Battery positive voltage Taillight 48-Ground Constant Continuity Taillight 50-Ground Constant Continuity If the circuit is not as specified, inspect the circuits connected to other parts.