Quote:
Originally Posted by ulremember
Thank you Nahkapohjola!!!!!!!!!
Will Check !!!!
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Thks for thks
Power Polarity Safety Relay
Not knowing the history, I want to remind of the safety feature which may be broken and inhibit ECU power supply: there is a relay guarding against wrong battery polarity which can 'jam' as any other relay.
For myriad reasons the car battery has to be changed. If in the installation someone installs the battery the wrong way, causing +plus pole to be connected to ground etc - this will burn 'all electronics' in the vehicle. To guard this, there is the safety relay.
In -93 3rd gen Maxima, this relay is located in the trunk, rear panel, beside drivers side lamp - under the panel. Actually there are two; the other is for the fuel pump.
I've never heard anyone complaining about this; but if there is no pwr in ECU ... through this is one ctrl point the ECU supply pwr is delivered... I guess all other functions are still ok when this relay fails.