Fuel Gauge quit working
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Senior User
Joined: Mar 2007
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Fuel Gauge quit working
Well I just got my trucks electrical all sorted out, signals, tail lights etc...and now the dam fuel gauge has quit working. Its just stuck on E. Any advice where to start?
Moderator
Joined: Jan 2001
Posts: 57,027
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From: Virginia
See if you can get to the fuel tank where the sending unit is. Take the wire off, and with the key in run, touch the wire to ground. The guage should swing full scale one direction. Then take the wire off ground and let it hang in the air. The gauge should swing full scale the opposite direction.
If the above test works, the wiring and the gauge are good, and there is something wrong with the sending unit.
Also make sure the sending unit itself has a good ground, don't trust the tank straps for a ground.
If the above test works, the wiring and the gauge are good, and there is something wrong with the sending unit.
Also make sure the sending unit itself has a good ground, don't trust the tank straps for a ground.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 790
From: Simi Valley, CA
Once you get finished with the electrics, check the actual float on the fuel tank sending unit. The float is composed of two pieces of copper soldered together. Solder breaks down, gas seeps in, float sinks to bottom of tank. There's also a filter screen on the pickup tube that after 30 years will need replacing too.
C0AZ-9202-A .. Fuel sender float
D1AZ-9A011-A .. Fuel sender screen (filter)
C1AF-9276-A .. Fuel sender gasket~to tank
C0AZ-9202-A .. Fuel sender float
D1AZ-9A011-A .. Fuel sender screen (filter)
C1AF-9276-A .. Fuel sender gasket~to tank
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