Hi all.
I have a NA '87 RX which I blew the engine in several years ago. I found one that's making compression, popped it in, put everything together, then realized I have no idea where the wiring harness for the fuel sender is! Lol. It seems stupid, but I just can't seem to find the harness that the sending unit is supposed to plug into... It's making me feel retarded. Sorry for this stupid post, but if there are any S4 NA owners who wouldn't mind lifting their hatch upholstry and taking a couple of pictures of where the heck the sending unit harnesses up, it would be very much appreciated! Thanks guys and gals.

 

If your having issues with the stock wiring, just do yourself a favor and run a new thicker wire on a relay and fuse to the pump.

Having the fuel pump on a switch also helps with de-flooding (since you have a S4 and don't have the fuel cut when pedal pressed to the floor trick).


If your really determined to find it, the wires for the fuel pump run from the drivers side kick panel all the way back along the drivers side till about the speaker tower where it comes across to the fuel pump cover.

 

Thanks for your thoughts. Yeah, flooding is a pain in the s4.
I was definitely trying to find the stock harness, for simplicity's sake. I figured it must be on the driver's side, I just don't see it anywhere. Kind of annoying...

 

Ahh, I found it! It's fastened to the back side of the left speaker tower. Thanks G1!!