Turn Signal/Hazard Flasher Control Circuit Input Test

1.Remove the gauge assembly.

2.Disconnect the 20P connector (A) from the gauge assembly (B).

 

3.Make these input tests at the gauge 20P connector terminals.

  • 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 Wire Test condition Test: Desired result Possible cause if result is not obtained 
A19 BLK Under all conditions Check for continuity to ground:
There should be continuity. 
  • Poor ground (G401)
  • An open in the wire
 
A10
*
A20 
GRN/WHT
*
BLK/WHT 
Connect A10 and A20 terminals, then hazard warning switch ON Check the hazard warning lights:
Hazard warning lights should come on. 
  • Poor ground (G201, G301, G401, G502)
  • Faulty hazard warning switch
  • An open in the wire
 
A10 GRN/WHT Ignition switch ON (II) Check for voltage to ground:
There should be battery voltage. 
  • Blown No. 3 (7.5A) fuse in the under-dash fuse/relay box
  • Faulty hazard warning switch
  • An open in the wire
 
Hazard warning switch ON Check for voltage to ground:
There should be battery voltage. 
  • Blown No. 14 (10A) fuse in the under-hood fuse/relay box
  • Faulty hazard warning switch
  • An open in the wire