Body/interior question

[mlaw7]

I hope everyone is having a wonderful holiday weekend!

After I removed the tar paper from the floorboards of my '78 coupe, I noticed a hole with a grommet on the passenger side underneath the hatch riser for a pair of wires colored black and green. The inner diameter of the grommet is approx. 1/2".

These two wires run through the grommet to the underside of the car. I didn't trace them back but that's not the issue.

What struck me about this was the fact that there is a lot of clearance around the two wires inside the grommet through which you can very clearly see the ground.

Which to me means that water and other foreign substances have a big entry way into the interior of my car right there.

The attached photo shows these two wires running underneath an archway in the riser to the grommet. I didn't have my camera handy to take a closer photo of this.

So my question is whether this is way it was designed or is there something missing? It just seems strange to me to have this big open hole in the underside of my car.

Thanks!

[Pomorza]

I had this same issue on my Z where the P.O drilled a hole in the tranny tunnel about a sixth of the way back. My advise is this. Either figure out where these "mystery" wires go to and what they control. Once you have this figure out you can do one of two things. First reroute the wires in a more appropriate way and weld the said hole shut. Or you can leave the wires there and fill in the hole with some rubber or gasket maker or something.

Either way fill in that hole. Water has a nasty way of finding its way into any area where it can. Water and thirty plus year old metal isn't exactly the best combination.

Jan

[FastWoman]

I'm guessing that might be the fuel pump wiring. If memory serves me, the grommet on my car has a rubber "nipple" on it that seals tightly around the wire. Then I THINK I remember wiring tree tape wrapped around the nipple, making it very water tight.

There's always silicone calk. You can get 3M's marine-grade 5200 in black. Good stuff. Very tough.

Peace,

Sarah

[=Enigma=]

Both the location and colors look right for fuel pump wiring.