Caprice V6-262 4.3L (1987)
Reference Signal: Testing and Inspection
Fig. 019 - Wiring Diagram for Chart C-1B Crank Signal. VIN Z
CHART C-1B
CRANK SIGNAL
4.3L "B/G" SERIES
FUEL INJECTION (TBI)
Circuit Description:
Crank signal is a 12 volts signal to the ECM during cranking to allow enrichment and cancel diagnostics until engine is running 12 volts is no longer
on circuit.