Hi,

I am about to install an aftermarket fuel sending unit in my 1993 Volvo 240 wagon. I want to correct (or confirm) the wiring on the aftermarket unit before I remove the old unit.

It's been said that the following two wiring errors are common with aftermarket fuel sending units:

1. The black and grey wires going into the black keyed connector are reversed.
2. The black and yellow wires going into the pump are reversed and cause the pump to run backwards.

I've checked here and other forums, and I see that:

Inside the tank:
Yellow = Ground
Black = 12v to pump

Outside the tank @ the black keyed connector:
Grey = Gauge
Black = Pump
Brown = Ground

However, no one has written down what the wiring actually looks like. My questions are:

1. Inside tank: With the soldered pump terminal connectors facing out toward me, on which side (left or right) should the black and yellow wires be?

2. Outside tank: With the beveled side facing up and the end of the black keyed connector facing me, on which side (left or right) should the black and grey wires be?

Could anyone help? I've included pictures of the out-of-the-box wiring for the aftermarket fuel sending unit: http://imgur.com/a/4CDFL

Thank you!