LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 1995 >> Forward Control 4.3 Z, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Engine Controls - Basic Testing - 7.4L) >> C-4, Basic Ignition System Checks >> HEI-Est Distributor >> Tach Pulse (RPM) Signal

Tach Pulse (RPM) Signal

WARNING: This page is about a different variant/trim than selected.

Connect scan tester to DLC. RPM should be indicated on tester when engine is cranked or running. Tach pulse (RPM reference) will be indicated as a voltage signal when a DVOM connected to battery voltage is used to backprobe circuit No. 430, PCM terminal. See Figure. If tach pulse signal is not present, vehicle will not run.

scientia non olet · About LEMON Manuals