Headlight Dimmer Switch: Inspection
WARNING: This page is about a different car, the 2007 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
- INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY
- Measure the resistance of the switch (for all testing below, see Fig 1).
Standard resistance:
Light control switch
RESISTANCE SPECIFIED CONDITIONSTester Connection Switch Condition Specified Condition 12 (EL) - 18 (T) OFF 10 kΩ or higher 12 (EL) - 19 (A) OFF 10 kΩ or higher 12 (EL) - 20 (H) OFF 10 kΩ or higher 12 (EL) - 18 (T) TAIL Below 1 Ω 12 (EL) - 20 (H) HEAD Below 1 Ω 12 (EL) - 18 (T) HEAD Below 1 Ω 12 (EL) - 19 (A) AUTO Below 1 Ω Headlight dimmer switch
RESISTANCE SPECIFIED CONDITIONSTester Connection Switch Condition Specified Condition 12 (EL) - 11 (HU) FLASH Below 1 Ω 12 (EL) - 16 (HL) FLASH Below 1 Ω 12 (EL) - 16 (HL) LO BEAM Below 1 Ω 12 (EL) - 11 (HU) HI BEAM Below 1 Ω Turn signal switch
RESISTANCE SPECIFIED CONDITIONSTester Connection Switch Condition Specified Condition 12 (EL) - 13 (TR) Right turn Below 1 Ω 12 (EL) - 15 (TL) Neutral 10 kΩ or higher 12 (EL) - 13 (TR) Neutral 10 kΩ or higher 12 (EL) - 15 (TL) Left turn Below 1 Ω Fog light switch
RESISTANCE SPECIFIED CONDITIONSTester Connection Switch Condition Specified Condition 3 (LFG) - 4 (BFG) OFF 10 kΩ or higher 3 (LFG) - 4 (BFG) ON Below 1 Ω Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If the result is not as specified, replace the dimmer switch assembly.
- Measure the resistance of the switch (for all testing below, see Fig 1).