Bulb Check Relay: Tacoma
- Bulb check relay is located on back of instrument cluster. See Figure. Turn ignition switch to OFF position. Remove instrument cluster. Using a jumper wire, connect negative battery terminal to bulb check relay terminal "B". See Fig 1.
- Using another jumper wire, connect a 12-volt, 1.4-watt test light between positive battery terminal and bulb check relay terminal "C". Test light should be off. Connect another jumper wire between positive battery terminal and bulb check relay terminal "A". Test light should be on. If test light does not illuminate as specified, replace relay.
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