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Turn Signal/Hazard Relay Input Test

  1. Remove the turn signal/hazard relay (A) from the under-dash fuse/relay box (B).
    Fig 1: Identifying Turn Signal/Hazard Relay And Under-Dash Fuse/Relay Box
    G05492884Courtesy of AMERICAN HONDA MOTOR CO., INC.
  2. Inspect the relay and fuse/relay box socket terminals to be sure they are all making good contact.
    • If the terminals are bent, loose, or corroded, repair them as necessary, and recheck the system.
    • If the terminals look OK, go to step 3.
  3. Make these input tests at the fuse/relay box.
    • If any test indicates a problem, find and correct the cause, then recheck the system.
    • If all the input tests prove OK, the turn signal/hazard relay must be faulty; replace it.
      TEST CONDITION REFERENCE CHART

      Cavity Test condition Test: Desired result Possible cause if desired result is not obtained
      6 Under all conditions Measure the voltage to ground:
      There should be battery voltage.
      • Blown No. 16(15 A) fuse in the under-hood fuse/relay box
      • Faulty under-dash fuse/relay box
      • An open in the wire
      1 Under all conditions Check for continuity to ground:
      There should be continuity.
      • Poor ground (G501, G601)
      • Faulty under-dash fuse/relay box
      • An open in the wire
      2 Connect the No. 6 terminal to the No. 2 terminal with a jumper wire. Check the turn signal lights operation:
      The left turn signal lights and indicator should come on.
      • Blown bulb
      • Poor ground (G301, G501, G601, G701)
      • An open in the wire
      3 Connect the No. 6 terminal to the No. 3 terminal with a jumper wire. Check the turn signal lights operation:
      The right turn signal lights and indicator should come on.
      • Blown bulb
      • Poor ground (G201, G503, G701)
      • An open in the wire
      4 Ignition switch ON (II) and turn signal switch in Left position Measure the voltage to ground:
      There should be about 10 V.
      • Poor ground (G501, G601)
      • Faulty turn signal switch
      • Faulty under-dash fuse/relay box
      • An open in the wire
      • Faulty combination switch control unit
      • Faulty MICU(1)
      5 Ignition switch ON (II) and turn signal switch in Right position Measure the voltage to ground:
      There should be about 10 V.
      4 Hazard warning switch ON Measure the voltage to ground: There should be about 10 V.
      • Poor ground (G501, G601)
      • Blown No. 16(15 A) fuse in the under-hood fuse/relay box
      • Faulty under-dash fuse/relay box
      • Faulty hazard warning switch
      • An open in the wire
      • Faulty MICU(1)
      5 Measure the voltage to ground:
      There should be about 10 V.
      (1) Go to the B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A )
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