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Main Relay (Computer/Fuel System): Description and Operation

PCM Relay:

PURPOSE
The PCM relay provides operating power to the Powertrain Control Module (PCM).

LOCATION
Mounted in Fuse/Fuse Link Box-1 on the driver's side fender.

OPERATION
The PCM relay coil receives 12VDC from a fuse link and is grounded through pin 4 of the PCM. When the relay coil is grounded, the contact switch closes and supplies operating 12VDC to pin 47 of the PCM.