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Home >> GMC >> 1998 >> Yukon RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 124 (Engine Controls - System & Component Testing 7.4L) >> Ignition System >> Timing Control Systems >> Ignition Control Circuit
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Ignition Control Circuit

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 1998 GMC Suburban, 1998 GMC Pickup, 1998 GMC Cab & Chassis, 1998 GMC C3500 HD, and 1998 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.

An open or short to ground in Ignition Control (IC) or by-pass circuit will cause PCM/VCM to turn on Malfunction Indicator Light (MIL) and confirm fault by setting a related trouble code. See TESTS W/CODES - 7.4L article.

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