C 20 3/4 Ton Pickup 2WD V8-379 6.2L DSL VIN J FI (1982)
Glow Plug: Customer Interest
Glow Plugs - No Start Condition, Fail to Heat
Number:
83-I-64
Section:
VIy
Date:
May, 1983
Subject:
GLOW PLUGS FAIL TO HEAT - 1982-83 10-30 LIGHT DUTY "C-K-G-P" TRUCKS WITH 6.2L DIESEL
TO:
ALL CHEVROLET DEALERS
A "no-start condition - due to no glow plug heating" can result from a shorted Delco alternator positive diode.
When this condition occurs in the alternator, battery voltage
can be supplied to the glow plug controller with the key in
the off position. This battery voltage is normally supplied
to pin #1 in the glow plug controller from the alternator
after the engine starts. This voltage, in effect, tells the
controller that the engine has started and shuts off the glow
plug heating cycle.
When a "no glow plug heating" condition is received, a quick check should be made to see if a shorted diode is the cause.
