Join the Car Talk Community!

Discussion Rules

Welcome to the Car Talk Community!

Want to ask a question or join the discussion? Great! Join now.

Sign In Register

Quad driver module circuit

1991 Buick skylark gs,3.3L,3 speed auto. Where is the quad driver module circuit located? What does it do?


  • edited November 2010
    The quad driver is located inside the computer. The quad driver controls various components such as the Check Engine light, electric cooling fan, EGR solenoid, purge solenoid, etc. If there's a problem with the quad driver, the computer is replaced.

  • edited November 2010
    Thanks a lot, that explains many things. You've been a big help-Karl
This discussion has been closed.