Quad driver module circuit

Maintenance/Repairs
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1

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

2

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.

Tester

3

Thanks a lot, that explains many things. You’ve been a big help-Karl