5. Check Horn Relay Circuit

1. Disconnect horn relay and horn high or low connector.
2. Check continuity between horn relay connector E3-5 terminal 3 and horn connector E43 (low), E63 (high) terminal 1 (G, G/OR).
   1. LOW 
   2. 3 - 1 (G) : Continuity should exist  .
   3. HIGH 
   4. 3 - 1 (G/OR) : Continuity should exist  .

OK or NG 

1. OK: GO TO 6.
2. NG: Repair or replace harness.

Fig 1: Check Continuity Between Horn Relay & Horn

Courtesy of NISSAN MOTOR CO., U.S.A.