Printable Version of Topic

Posted by: NARP74 Jun 21 2024, 04:40 PM

I am moving my fuel pump from an up front location to a better up front location. The PO ran the power wire through a hole in the passenger foot well. I don't like that idea. Is there a better option that routes from the fuse box to in or around the steering rack area?

Posted by: windforfun Jun 21 2024, 04:43 PM

How about the hole for the brake master cylinder switch wire?

Posted by: NARP74 Jun 21 2024, 04:44 PM

I'll take a look. Thx

Posted by: worn Jun 22 2024, 04:10 PM

That comes through the firewall as part of a big bundle of wiring harness. Then if I recollect properly it dives into the fuel tank well and through a grommet out as a single wire or pair of wires.
A reasonable route. The two key thoughts that I have is to used a fused circuit that is hot when ignition is on, and to properly protect the wire. The hole through sheet metal needs a rubber grommet.

Posted by: windforfun Jun 22 2024, 06:18 PM

If you need a new grommet, get one & cut the wall at 45 degrees. Then open it up & slip it over the wiring. Then shove it in the hole in the sheet metal.

Posted by: ClayPerrine Jun 22 2024, 08:40 PM

When moving the fuel pump up front, I follow the wiring harness that is already in the car. You don't have to run two wires all the way from the back. Just one Black/yellow wire to extend the factory wire, and run it up to the front until it goes under the tank. Add a second ground wire from the ground point by the fuse block to where your pump is mounted.


In my opinion, anything else looks sloppy.

Posted by: mb911 Jun 23 2024, 04:50 AM

Posted by: JeffBowlsby Jun 23 2024, 08:21 AM

FYI...

The factory 1975-76 cars used a single black/red stripe equivalent to 12 gage wire from the relay board to the fuel pump in the front tank well, and a separate 12 gage brown cable to a lug welded to the chassis in the tank well.

Just extending the original 17 gage black/red wire from the original engine firewall location is a problem, insufficient ampacity.

Relocating then FP more forward than the front tank well increases a fire problem risk in a front end crash.




Attached thumbnail(s)

Posted by: NARP74 Jun 23 2024, 09:12 AM

This is a 74 with a 6 in it. Was originally on the engine firewall. PO moved it to a crude location near the steering rack but poorly done. I am making it better in a very similar location. Wiring should be better as previously noted and I will be able to put the steering rack cover on without bending it and forcing it on.

Posted by: theer Jun 26 2024, 08:10 AM

I have carbs, which for me left one of the fuel lines available as a conduit for an extension wire from the rear and drops you out right at the tank. Obviously won’t work if you kept the FI.

Posted by: r_towle Jun 26 2024, 02:57 PM

There are headlight wires.

Open hood, follow those wires under the cowl, just above the fuse panel….a grommet or two there will have room.