fuel pump wiring

Reply Subscribe

Thread Tools

Search this Thread

Feb 18, 2009 | 10:27 AM

Jonnycash

Thread Starter

New User

Joined: Nov 2008

Posts: 20

Likes: 0

fuel pump wiring

Hi,
Does anyone know what color wires I should be looking for? I need to find the wires that go to the relay, and the ones that go to the shutoff saftey switch. This is an 88 f350 with a 351w.
If you know where could find a wiring diagram, thatb would help as well.
Thanks

Feb 18, 2009 | 11:42 AM

1966Tbird

Posting Guru

Joined: Dec 2006

Posts: 1,639

Likes: 2

the enertia switch for the safty thing is located right above the main plug that goes through the firewall

Feb 18, 2009 | 12:05 PM

Jonnycash

Thread Starter

New User

Joined: Nov 2008

Posts: 20

Likes: 0

Thanks.
This truck no longer ha the enertia switch.
What happened was... I swapped the cab over from a diesel truck. I scrapped the old cab and now the fuel pump is not coming on. I used all the wiring from the gas truck, including the dash from the gas job.
I found a plug with 2 wires... pink and brown. They would reach perfect to where your talking about. Those must be them.

Feb 18, 2009 | 12:20 PM

1966Tbird

Posting Guru

Joined: Dec 2006

Posts: 1,639

Likes: 2

yes those are them the brown one goes to the pump the pink one goes to a switch somewhere

Feb 18, 2009 | 12:37 PM

Jonnycash

Thread Starter

New User

Joined: Nov 2008

Posts: 20

Likes: 0

Thanks again.
I jumped the brown and pink and when I turn the key on, it sounds like the pump kicks on. Still not starting though. Is there a relay in the mix somewhere? This truck ran great before I swapped the cabs, now I can't get it to start. I also found a plug under the hood on the right side that has no mate. It is a black plug with 3 wires...
orange -- black w/green stripe -- black w/brown stripe. I don't know what this belongs to, comes out of the main harness.

Feb 18, 2009 | 02:24 PM

1966Tbird

Posting Guru

Joined: Dec 2006

Posts: 1,639

Likes: 2

don't know about your plug but if it helps i cut the pink wire and put it on a toggle switch but ran it through the inertia switch too and all is fine, i don't have any fuel injection stuff on my truck cause i switched to a carb and cut out every wire under the hood that wasn't going to something or else i would go out and check for you

Feb 18, 2009 | 04:55 PM

Jonnycash

Thread Starter

New User

Joined: Nov 2008

Posts: 20

Likes: 0

Thanks, T bird, I apreciate all the help.
I've been trying to make this thing run for 2 days now. I tried jumping the 2 contacts in the plug (pink/brown), I also came across another brown wire with a single female connector on the end. Not sure if this has anything to do with the fuel pump or what. I also noticed the fuel gauge is not working... I'm pretty sure I have no power heading to that sending unit. I have a new set of eyes coming over to peek at it, hopefully I will get this thing figured out soon.
Again, i appreciate the help.