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Home >> Chevrolet >> 1990 >> Step Van 7.4 N, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Steering Column Switches >> Turn Signals & Hazard Flashers >> Testing >> Hazard Flasher Inoperative

Hazard Flasher Inoperative

  1. Turn ignition on and operate turn signals. If turn signals operate, check stop/hazard fuse. If fuse is okay, replace hazard flasher. Operate hazard flasher system. If system does not operate, go to step 2). If fuse is blown, replace stop/hazard fuse. If new fuse blows, repair short to ground in turn signal circuit(s) or in stoplight circuit.
  2. Using a test light, check for voltage at Brown wire at turn signal steering column connector under dash. If no voltage is present, repair open circuit between flasher and connector.
  3. If voltage is present and connections at steering column connector are okay, check output voltage from turn signal switch at Light Blue, Blue, Yellow, and Dark Green wires. If there is no output voltage, replace turn signal switch.
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