Turn Signal/Hazard Relay Input Test

1.Remove the turn signal/hazard relay (A) from the under-dash fuse/relay box (B).

 

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 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.

Cavity Test condition Test: Desired result Possible cause if result is not obtained 
Under all conditions Check for continuity to ground:
There should be continuity. 
  • Poor ground (G301)
  • An open in the wire
 
Ignition switch ON (II)
Hazard warning switch OFF 
Check for voltage to ground:
There should be battery voltage. 
  • Blown No. 19 (7.5A) fuse in the under-dash fuse/relay box
  • Faulty hazard warning switch
  • An open in the wire
 
Hazard warning switch ON
Ignition switch OFF 
Check for voltage to ground:
There should be battery voltage. 
  • Blown No. 5 (15A) fuse in the under-hood fuse/relay box
  • Faulty hazard warning switch
  • An open in the wire
 
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, G502, G601)
  • 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, G502, G601)
  • Faulty hazard warning switch
  • An open in the wire