Fuel Gauge Stuck above full
#1
#2
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Ford fuel gauges, 1989 and up, use 16 Ohms(Empty) and 158 Ohms(Full)
Ohms is resistance, 16 ohms almost no resistance, like a short, a direct connection
High ohms(158) is like no connection, disconnected wire.
So below Empty would be a short, assuming tank isn't empty, lol
Above Full is a disconnected wire.
Battery would not effect this in most cases.
Some ideas here: fuel gauge over full - Ford Explorer and Ranger Forums "Serious Explorations"®
Read it all the way thru
The wire for the gauge at the tank end is usually Yellow.
If key is on and you Ground the Yellow wire, 0 Ohms, then gauge should go down to empty.
If that happens then gauge and yellow wire are OK most likely problem is the Sending unit(float) in the tank or its Ground wire.
Gauge----(yellow wire)------------sending unit(float)----------Ground
Ohms is resistance, 16 ohms almost no resistance, like a short, a direct connection
High ohms(158) is like no connection, disconnected wire.
So below Empty would be a short, assuming tank isn't empty, lol
Above Full is a disconnected wire.
Battery would not effect this in most cases.
Some ideas here: fuel gauge over full - Ford Explorer and Ranger Forums "Serious Explorations"®
Read it all the way thru
The wire for the gauge at the tank end is usually Yellow.
If key is on and you Ground the Yellow wire, 0 Ohms, then gauge should go down to empty.
If that happens then gauge and yellow wire are OK most likely problem is the Sending unit(float) in the tank or its Ground wire.
Gauge----(yellow wire)------------sending unit(float)----------Ground
#4
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#5
#6
RF Veteran
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Also look at taking the bed off.
6 bolts and the tail light wires.
Filler tube needs to come off for either method, bed off or drop tank.
With bed off, or just moved back, all the tank wiring stays in place so you can see if there is a problem, it is best to have a helper to move the bed off and back on.
Google: ford ranger bed removal
Lots of info on that
6 bolts and the tail light wires.
Filler tube needs to come off for either method, bed off or drop tank.
With bed off, or just moved back, all the tank wiring stays in place so you can see if there is a problem, it is best to have a helper to move the bed off and back on.
Google: ford ranger bed removal
Lots of info on that
Last edited by RonD; 04-28-2016 at 09:49 AM.
#8
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Probably too hard for one guy without some sort of lift, don't want to damage the bed.
I had rusted out rear leaf spring hangers, but had a garage.
I backed truck in and use straps and come alongs to lift bed up via rafters, then drove it out to do the work.
Realigning was harder but bed isn't that heavy.
I had rusted out rear leaf spring hangers, but had a garage.
I backed truck in and use straps and come alongs to lift bed up via rafters, then drove it out to do the work.
Realigning was harder but bed isn't that heavy.
#10
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#12
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