Maxima V6-2960cc 3.0L SOHC MFI (VG30E) (1990)
ECCS (Engine Management) Relay: Description and Operation
Polarity Protection Relay, ECM
Fig. 63 Saftey Relay
The safety relay (located in the rear panel near the L.R. tail lamp) is utilized to prevent damage to the ECU in the event the battery is connected in
reverse.