 Clean Wire Route, Fuel Pump |
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| NARP74 |
 Jun 21 2024, 04:40 PM
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#1
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Senior Member  Group: Members Posts: 1,085 Joined: 29-July 20 From: Colorado, USA, Earth Member No.: 24,549 Region Association: Rocky Mountains  |
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?
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| windforfun |
Jun 21 2024, 04:43 PM
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#2
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Senior Member Group: Members Posts: 1,889 Joined: 17-December 07 From: Blackhawk, CA Member No.: 8,476 Region Association: None |
How about the hole for the brake master cylinder switch wire?
(IMG:style_emoticons/default/beer3.gif) (IMG:style_emoticons/default/beer3.gif) (IMG:style_emoticons/default/beer3.gif) |
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| NARP74 |
Jun 21 2024, 04:44 PM
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#3
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Senior Member Group: Members Posts: 1,085 Joined: 29-July 20 From: Colorado, USA, Earth Member No.: 24,549 Region Association: Rocky Mountains |
I'll take a look. Thx
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| worn |
Jun 22 2024, 04:10 PM
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#4
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can't remember Group: Members Posts: 3,194 Joined: 3-June 11 From: Madison, WI Member No.: 13,152 Region Association: Upper MidWest 
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QUOTE(windforfun @ Jun 21 2024, 03:43 PM)  How about the hole for the brake master cylinder switch wire? (IMG:style_emoticons/default/beer3.gif) (IMG:style_emoticons/default/beer3.gif) (IMG:style_emoticons/default/beer3.gif) 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. |
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| windforfun |
Jun 22 2024, 06:18 PM
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#5
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Senior Member Group: Members Posts: 1,889 Joined: 17-December 07 From: Blackhawk, CA Member No.: 8,476 Region Association: None |
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.
(IMG:style_emoticons/default/biggrin.gif) (IMG:style_emoticons/default/biggrin.gif) (IMG:style_emoticons/default/biggrin.gif) |
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| ClayPerrine |
Jun 22 2024, 08:40 PM
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#6
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Life's been good to me so far..... Group: Admin Posts: 15,592 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille
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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. |
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| mb911 |
Jun 23 2024, 04:50 AM
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#7
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914 Guru Group: Members Posts: 6,972 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest
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QUOTE(ClayPerrine @ Jun 22 2024, 06:40 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. (IMG:style_emoticons/default/agree.gif) |
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| JeffBowlsby |
Jun 23 2024, 08:21 AM
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#8
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914 Wiring Harnesses Group: Members Posts: 8,578 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None
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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) 
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| NARP74 |
Jun 23 2024, 09:12 AM
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#9
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Senior Member Group: Members Posts: 1,085 Joined: 29-July 20 From: Colorado, USA, Earth Member No.: 24,549 Region Association: Rocky Mountains |
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.
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| theer |
Jun 26 2024, 08:10 AM
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#10
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Senior Member Group: Members Posts: 678 Joined: 31-July 15 From: Dover, MA Member No.: 19,014 Region Association: North East States
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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.
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| r_towle |
Jun 26 2024, 02:57 PM
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#11
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Custom Member Group: Members Posts: 24,599 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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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. |
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