1992 Cadillac Seville No Restart
I found this....
If code E052 is seen accompanied by complaint of engine quit, stumble, telltale's flashing or other stored codes, check for intermittent loss of power or ground to the PCM on CKT 480 and 450 respectively. Manipulate wiring and connections with engine running. Remove and replace the PCM A/B, C/D, and E/F connectors and ensure that they are latched.
The G301 ground is located under the right Kick panel. There are two gounrd bolts, and the G301 is the top bolt. Check that and the associated wiring the the ECM.
Good luck
Suggested Repair
Treat the stored code as E052 and check for intermittent power or ground loss to the PCM on circuits 480 and 450. With the engine running, manipulate the wiring and connections, then remove and reseat the PCM A/B, C/D, and E/F connectors so they latch fully. Also inspect the G301 ground under the right kick panel—the top of the two ground bolts—and its wiring to the ECM.
Conversation Summary
The owner of a 1992 Cadillac Seville said it runs normally but will not crank after a short stop; radio lights go out while gauge lights stay on, and it starts after sitting 30 to 60 minutes. New plugs, wires, coil, ignition module, cap, and rotor did not fix it, and code IO-52 was stored. The expert identified this as E052 and advised checking PCM power and ground circuits 480 and 450, reseating the PCM connectors, and inspecting the G301 ground under the right kick panel. Later messages about code IO-39 and a VCC brake ignition issue received no reply.
