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HOMESERVICE MANUALSHONDA2002CIVIC SIREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 110 (TURN SIGNAL/HAZARD FLASHER)TURN SIGNAL/HAZARD RELAY INPUT TEST
2002 Honda Civic Si

Turn Signal/Hazard Relay Input Test

2002 Honda Civic SiSECTION Turn Signal/Hazard Relay Input Test
WARNING: This page is about a different car, the 2006 Acura MDX, 2005 Acura MDX, 2004 Acura MDX, and 2003 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the driver's under-dash fuse/relay box (see UNDER-DASH FUSE/RELAY BOX ).
  2. Remove the turn signal/hazard relay (A) from the driver's under-dash fuse/relay box (B).
    Fig 1: Removing Turn Signal/Hazard Relay
    G03642156Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. 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 4.
  4. 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.
      CAVITY AND TEST CONDITION SPECIFICATION

      Cavity Test condition Test: Desired result Possible cause if result is not obtained
      1 Under all conditions Check for continuity to ground: There should be continuity.
      • Poor ground (G401)
      • An open in the wire
      2 Ignition switch ON (II) Check for voltage to ground: There should be battery voltage.
      • Blown No. 10 (7.5 A) fuse in the driver's under-dash fuse/relay box
      • Faulty turn signal switch
      • An open in the wire
      Hazard warning switch ON Check for voltage to ground: There should be battery voltage.
      • Blown No. 49 (15A) fuse in the under-hood fuse/relay box
      • Faulty hazard warning switch
      • An open in the wire
      3 Ignition switch ON (II) and turn signal switch in Right or Left position Connect No. 2 terminal to No. 3 terminal: Right or left turn signal lights should come on.
      • Poor ground (G201, G301, G501, G601, G652)
      • Faulty turn signal switch
      • An open in the wire
      Hazard warning switch ON Connect No. 2 terminal to No. 3 terminal: Hazard warning lights should come on.
      • Poor ground (G201, G301, G501, G601, G652)
      • Faulty hazard warning switch
      • An open in the wire
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.