Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2001 Toyota PriusFACTORY OEM SERVICE PROCEDURE

Headlight Control Switch

Remove necessary steering column covers for access to headlight control switch. See Figure. Disconnect 17-pin electrical connector from headlight control switch.

Using ohmmeter, check for no continuity and continuity between specified electrical terminals on headlight control switch in relation to headlight control switch position. See Fig 1. See HEADLIGHT CONTROL SWITCH CONTINUITY table. Replace headlight control switch if defective.

HEADLIGHT CONTROL SWITCH CONTINUITY

Switch Position

Switch Terminals No.

Specification

OFF

⁽¹⁾

TAIL

14 & 16

Continuity

HEAD

13, 14 & 16

Continuity

FLASH

7, 8 & 16

Continuity

LOW BEAM

16 & 17

Continuity

HIGH BEAM

7 & 16

Continuity

⁽¹⁾	There should be no continuity between any terminals.

Fig 1: Identifying Headlight Control Switch Electrical Terminals & Headlight Control Switch Positions

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.

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