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

Main Relay:

PURPOSE
The ECM relay provides operating power to the Electronic Control Module (ECM).

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

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