My fuel gauge is wildly off (shows 1/2 tank when full)
anyone know the OHM specs to calibrate it?
anyone know the OHM specs to calibrate it?
Fuel gauge calibration 1971 FJ40 (1 Viewer)
- Thread starter Imurdaddy
- Start date
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Green Bean
GOLD Star
You may want to check the connections at the tank sending unit, especially the ground wire that screws to the top of the sending unit.
forum.ih8mud.com
Cluster gauges and senders are a "set". You can't use a later sender with an earlier cluster, or a later cluster with an earlier sender.
Senders:
03/69-09/72 83320-35020
09/72-01/79 83320-60050
01/79-04/86 83320-60051
forum.ih8mud.com
Post# 10
This sender works like the oil pressure sender. It has a bimetal points type regulator in it. The float moves the contacts closer together and farther apart as fuel level changes, causing the amount of current to the fuel gauge to vary. If you want to test, just hook up to the sender wire in the truck before installing and raise/lower the float while watching the gauge. The mounting provides the ground so you will also need a jumper from the sender mounting flange to ground on your truck. Here you can see the cam moves the diaphragm on the sender.
Fuel Tank/Sending Unit for March 1971 FJ40
I am trying to get my sending unit to function properly and I ran into trouble. My original gas tank was leaking way back in the 1990's and, through a series of long-winded events, my dad took the lead on a replacement and came up with what I think is a later model year tank. From what I...
forum.ih8mud.com
Cluster gauges and senders are a "set". You can't use a later sender with an earlier cluster, or a later cluster with an earlier sender.
Senders:
03/69-09/72 83320-35020
09/72-01/79 83320-60050
01/79-04/86 83320-60051
70 FJ40 Fuel gauge mis-reading
I've waddled thru lots of these threads looking for a similiar problem to mine but haven't had much luck. My 1970 FJ40 gauge will only read ~1/2 tank when full and goes well below E when empty. When the ignition is first turned on the needle raises slowly to 1/4 then drops slowly to its...
forum.ih8mud.com
Post# 10
This sender works like the oil pressure sender. It has a bimetal points type regulator in it. The float moves the contacts closer together and farther apart as fuel level changes, causing the amount of current to the fuel gauge to vary. If you want to test, just hook up to the sender wire in the truck before installing and raise/lower the float while watching the gauge. The mounting provides the ground so you will also need a jumper from the sender mounting flange to ground on your truck. Here you can see the cam moves the diaphragm on the sender.
