Toyota Tundra Service Manual: Headlight Relay

On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. INSPECT HEADLIGHT RELAY

(a) Remove the headlight relay from the engine room relay box.

(b) Check the resistance.

(1) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
3 - 5	Battery voltage not applied to terminals 1 and 2	10 kΩ or higher
3 - 5	Battery voltage applied to terminals 1 and 2	Below 1 Ω

If the result is not as specified, replace the headlight relay.

Toyota Tundra Service Manual > Air Conditioning System(for Manual Air Conditioning System): ECU Power Source Circuit
DESCRIPTION This circuit provides power to operate the air conditioning amplifier. WIRING DIAGRAM PROCEDURE 1. INSPECT FUSE (ECU-B NO.2) (a) Remove the ECU-B NO.2 fuse from the driver side junction block. (b) Measure the resistance according to the value(s) in the table below. Standard resistance: T ...

Toyota Tundra Owners Manual