...LOL
1990 F-250 Switch Problems
Thread Starter
|
New User
Joined: Jan 2011
Posts: 20
Likes: 0
1990 F-250 Switch Problems
I have a switch right next to my ignition that says on off or goes up or down. for a few months i had it on off because the previous owner said to, but one day it would not start anyone know what the switch does or where i can reset it because my truck only works now when its switched on (which i never had to do before). and seems to make aq loud buzzing from near the middle rear of truck.
FTE Chapter Leader
Joined: May 2009
Posts: 8,843
Likes: 27
From: Eastern Ky
If it IS a homemade fuel pump relay switch, then that is why the truck only runs when the switch is ON;
Does it have the dual tanks (Longwheelbase)?
If so, try to find out what is wrong with the tank selector switch on the left hand side of the instrument cluster, beside the headlamp switch....
-Wes
Does it have the dual tanks (Longwheelbase)?
If so, try to find out what is wrong with the tank selector switch on the left hand side of the instrument cluster, beside the headlamp switch....
-Wes
Fleet Owner
Joined: Aug 2005
Posts: 23,668
Likes: 301
From: Easton,Ks
Sounds like a computer bypass switch that either grounds the fuel pump relay (if the computer is bad) or bypasses the fuel pump relay.
Either way not a good idea.
Either way not a good idea.
Trending Topics
Lead Driver
Joined: Feb 2002
Posts: 7,970
Likes: 596
From: Greater Austin, Texas
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Thread Starter
|
New User
Joined: Jan 2011
Posts: 20
Likes: 0
it basically looks like this after asking a few people i know it appears its not a manufacturer switch and it is in fact illegal for ford to put toggle switches on their trucks its a federal offense so i have to find out what it toggles and why it was added most likely to bypass a broken fuel pump or something fuel related because my truck cranks normally when its off but wont start like its not getting fuel
Fleet Owner
Joined: Aug 2005
Posts: 23,668
Likes: 301
From: Easton,Ks
What do you call a Fuel Selector switch?
Is not a rocker switch a toggle switch also?
ill find out sooner or later
New User
Joined: Dec 2009
Posts: 20
Likes: 0
1991 f-250 dual tank switch
I recently purchased a 1991 Ford f-250, 4x4, x-cab, gas (460), with dual gas tanks. Previous owner warned me that rear tank always reads full on the gauge, regardless of how much is in the tank. I'd like to get this fixed, but not sure where to start. Is this an electrical problem? switch? fuse? relay? Any suggestions would be very appreciated. Thanks!
Fleet Owner
Joined: Aug 2005
Posts: 23,668
Likes: 301
From: Easton,Ks
It is an open in the path from the gauge to the ground.
This path has to travel through the selector switch, a few plugs, the sender unit and then to ground.
A bad connection along the line or an open in the sender can cause this open.
This path has to travel through the selector switch, a few plugs, the sender unit and then to ground.
A bad connection along the line or an open in the sender can cause this open.
Thread
Thread Starter
Forum
Replies
Last Post
staysbroken
1973 - 1979 F-100 & Larger F-Series Trucks
11
Nov 18, 2010 09:05 AM
salty4568
Electrical Systems/Wiring
3
Jan 22, 2004 07:42 PM
