Pontiac Fiero 1984-1988 Repair Guide

Horns

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POOR HORN TONE



  1. Poor horn tone-tighten the bolts in the mounting area.
  2.  
  3. Low pitched moan-Sounds like "mooing" caused by the current too high. Refer to the following Adjustment procedures.
  4.  
  5. Weak tone-current too low, correct poor connections, ground, or adjust as follows.
  6.  
  7. Weak stained tone-remove foreign object in the horn.
  8.  
  9. Harsh vibration-bend bracket so horn is not touching any sheet metal.
  10.  

ADJUSTMENT



The current draw for a horn while operating should be 4.5 to 5.5 amperes at 11.5 to 12.5 volts. High current (more than 20 amperes) indicates an overheated winding or shorted horn; replace the horn if this condition exists. A current reading of 18 amperes means the contact points are not opening; adjust the horn current as follows.

  1. To increase current-turn the adjusting screw clockwise.
  2.  
  3. To decrease current-turn the adjusting screw counterclockwise.
  4.  
  5. Current adjustments should be made 1 / 4 turn (90°) at a time.
  6.  

REMOVAL & INSTALLATION





Click image to see an enlarged view

Fig. Fig. 1 Exploded view of the horn assembly location and components

There are two horn assemblies installed at the front compartment frame rails, one on the left and the other on the right frame rail. Remove the electrical connector and retaining bolt. Note that the right and left horns have different mountingbrackets. Install the horn and torque the bolt to 12 ft. lbs. (15 Nm).

 
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