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If the result is not as specified, replace the HORN fuse. b. Measure the resistance of the horn relay circuit. 1. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE REFERENCE If the result is not as specified, replace the integration relay. 4. INSTALL INTEGRATION RELAY (UNIT E) a. Connect the 3 connectors. b. Install the integration relay to the engine room relay block. Fig. 5: Identifying Integration Relay Connector Terminals c. Install the engine room relay block cover. 5. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL Tester Connection Condition Specified Condition 1A-8 - 1C-1 When battery voltage is not applied between 1A-7 10 kohms or higher When battery voltage is applied between 1A-7 and Below 1 ohms NOTE: Some systems need to be initialized after the cable is reconnected (see
2009 Toyota Tundra 2009 ACCESSORIES AND EQUIPMENT Horn - Tundra
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