Toyota Tundra Service Manual: Stop Light Control Relay

On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. CHECK STOP LIGHT CONTROL RELAY

(a) Remove the stop light control relays (BRK NO. 1) from the engine room relay block.

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

Standard resistance:

for BRK NO. 1

Tester Connection	Condition	Specified Condition
3 - 4	When battery voltage is not applied to terminals 1 and 2	10 kΩ or higher
3 - 5	When battery voltage is not applied to terminals 1 and 2	Below 1 Ω
3 - 4	When battery voltage is applied to terminals 1 and 2	10 kΩ or higher
3 - 5	When battery voltage is applied to terminals 1 and 2	Below 1 Ω

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

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Toyota Tundra Owners Manual