Originally Posted by JOELTML
anyone know where the auto shutdown relay is on a 96 jgc? Im not getting any power to coil. It just shut off going down the road and never started again. and at the code reader port it shows on link with the key on
From the FSM the brain (PCM) opens and closes the ignition coil ground circuit to operate the ignition coil. This is done to adjust ignition timing (base) and advance, and for changing engine operating conditions.
The amount of electronic spark advance provided by the PCM is determined by five input factors:
engine coolant temperature,
intake manifold temperature,
manifold absolute pressure and
OK. ignition coil has voltage fed to it through a 18awg dg/or wire from the ASD relay through a splice near injector #5. Have a buddy turn it over while you check for votage there.
The ground is a 18awg gy/wt wire which comes from pin A7 of the PCM don't forget the igniton coil must be physiclly grounded also.
And the coil must be good!