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TJ gas gauge problem
Hi guys,
98 TJ. My gas gauge sometimes gives low readings. Early on I had a general problem with the gauges and airbag light. I did the procedure recommended here of slightly bending all the contacts. It worked fine and the gauges never went dead again and the airbag light never comes on. I do continue to have an occasional problem with the gas gauge. It will either read a half tank when I'm full or empty when I'm below half. No amount of smacking the dash will clear it. I have driven forward and reverse doing 'brake checks' in an attempt to jostle the tank sender. Nothing like that clears it. However, simply turning the ignition key off and back on will almost always clear it up. I know about the gauge test trick, but its hard to catch it in a failed condition because turning the key on and off fixes it. Its almost like there is a relay or something electromechanical feeding that circuit that makes better contact after getting the key turned off and on. Can't see anything obvious in the wiring diagrams. Any ideas? Its not a big problem, maybe once a week it will act up. Thanks -Nick |
Re: TJ gas gauge problem
http://www.jeepmadness.com/guages.htm
God Bless America, ßill O|||||||O mailto:-------------------- http://www.----------.com/ NickT wrote: > > Hi guys, > 98 TJ. My gas gauge sometimes gives low readings. Early on I had a general > problem with the gauges and airbag light. I did the procedure recommended > here of slightly bending all the contacts. It worked fine and the gauges > never went dead again and the airbag light never comes on. I do continue to > have an occasional problem with the gas gauge. It will either read a half > tank when I'm full or empty when I'm below half. No amount of smacking the > dash will clear it. I have driven forward and reverse doing 'brake checks' > in an attempt to jostle the tank sender. Nothing like that clears it. > However, simply turning the ignition key off and back on will almost always > clear it up. I know about the gauge test trick, but its hard to catch it in > a failed condition because turning the key on and off fixes it. Its almost > like there is a relay or something electromechanical feeding that circuit > that makes better contact after getting the key turned off and on. Can't see > anything obvious in the wiring diagrams. Any ideas? Its not a big problem, > maybe once a week it will act up. Thanks -Nick |
Re: TJ gas gauge problem
http://www.jeepmadness.com/guages.htm
God Bless America, ßill O|||||||O mailto:-------------------- http://www.----------.com/ NickT wrote: > > Hi guys, > 98 TJ. My gas gauge sometimes gives low readings. Early on I had a general > problem with the gauges and airbag light. I did the procedure recommended > here of slightly bending all the contacts. It worked fine and the gauges > never went dead again and the airbag light never comes on. I do continue to > have an occasional problem with the gas gauge. It will either read a half > tank when I'm full or empty when I'm below half. No amount of smacking the > dash will clear it. I have driven forward and reverse doing 'brake checks' > in an attempt to jostle the tank sender. Nothing like that clears it. > However, simply turning the ignition key off and back on will almost always > clear it up. I know about the gauge test trick, but its hard to catch it in > a failed condition because turning the key on and off fixes it. Its almost > like there is a relay or something electromechanical feeding that circuit > that makes better contact after getting the key turned off and on. Can't see > anything obvious in the wiring diagrams. Any ideas? Its not a big problem, > maybe once a week it will act up. Thanks -Nick |
Re: TJ gas gauge problem
http://www.jeepmadness.com/guages.htm
God Bless America, ßill O|||||||O mailto:-------------------- http://www.----------.com/ NickT wrote: > > Hi guys, > 98 TJ. My gas gauge sometimes gives low readings. Early on I had a general > problem with the gauges and airbag light. I did the procedure recommended > here of slightly bending all the contacts. It worked fine and the gauges > never went dead again and the airbag light never comes on. I do continue to > have an occasional problem with the gas gauge. It will either read a half > tank when I'm full or empty when I'm below half. No amount of smacking the > dash will clear it. I have driven forward and reverse doing 'brake checks' > in an attempt to jostle the tank sender. Nothing like that clears it. > However, simply turning the ignition key off and back on will almost always > clear it up. I know about the gauge test trick, but its hard to catch it in > a failed condition because turning the key on and off fixes it. Its almost > like there is a relay or something electromechanical feeding that circuit > that makes better contact after getting the key turned off and on. Can't see > anything obvious in the wiring diagrams. Any ideas? Its not a big problem, > maybe once a week it will act up. Thanks -Nick |
Re: TJ gas gauge problem
Could also be crudded up connector up by the sending unit on the gas tank.
It gauge works by resistance. The more resistance the emptier the tank. Corrosion will cause resistance and hence false readings. If you try this, disconnect the battery first. If you lie on your back with your head by the drivers side rear shock and look up you will see the wiring running up and over the front of the tank. Its a pain but you can reach up in there, disconnect the wiring, clean it and pile on the dielectric grease (the jeep owners friend :-) ). Just did this on my 2000 for the same reasons. There's a web link around somewhere that documents this with pix for various sensors and gauges. I don't have it off hand but Google should find it... Regards Warren "NickT" <nickt.remove@hvc.rr.com> wrote in message news:QDq0c.28062$H17.1379@twister.nyc.rr.com... > Hi guys, > 98 TJ. My gas gauge sometimes gives low readings. Early on I had a general > problem with the gauges and airbag light. I did the procedure recommended > here of slightly bending all the contacts. It worked fine and the gauges > never went dead again and the airbag light never comes on. I do continue to > have an occasional problem with the gas gauge. It will either read a half > tank when I'm full or empty when I'm below half. No amount of smacking the > dash will clear it. I have driven forward and reverse doing 'brake checks' > in an attempt to jostle the tank sender. Nothing like that clears it. > However, simply turning the ignition key off and back on will almost always > clear it up. I know about the gauge test trick, but its hard to catch it in > a failed condition because turning the key on and off fixes it. Its almost > like there is a relay or something electromechanical feeding that circuit > that makes better contact after getting the key turned off and on. Can't see > anything obvious in the wiring diagrams. Any ideas? Its not a big problem, > maybe once a week it will act up. Thanks -Nick > > |
Re: TJ gas gauge problem
Could also be crudded up connector up by the sending unit on the gas tank.
It gauge works by resistance. The more resistance the emptier the tank. Corrosion will cause resistance and hence false readings. If you try this, disconnect the battery first. If you lie on your back with your head by the drivers side rear shock and look up you will see the wiring running up and over the front of the tank. Its a pain but you can reach up in there, disconnect the wiring, clean it and pile on the dielectric grease (the jeep owners friend :-) ). Just did this on my 2000 for the same reasons. There's a web link around somewhere that documents this with pix for various sensors and gauges. I don't have it off hand but Google should find it... Regards Warren "NickT" <nickt.remove@hvc.rr.com> wrote in message news:QDq0c.28062$H17.1379@twister.nyc.rr.com... > Hi guys, > 98 TJ. My gas gauge sometimes gives low readings. Early on I had a general > problem with the gauges and airbag light. I did the procedure recommended > here of slightly bending all the contacts. It worked fine and the gauges > never went dead again and the airbag light never comes on. I do continue to > have an occasional problem with the gas gauge. It will either read a half > tank when I'm full or empty when I'm below half. No amount of smacking the > dash will clear it. I have driven forward and reverse doing 'brake checks' > in an attempt to jostle the tank sender. Nothing like that clears it. > However, simply turning the ignition key off and back on will almost always > clear it up. I know about the gauge test trick, but its hard to catch it in > a failed condition because turning the key on and off fixes it. Its almost > like there is a relay or something electromechanical feeding that circuit > that makes better contact after getting the key turned off and on. Can't see > anything obvious in the wiring diagrams. Any ideas? Its not a big problem, > maybe once a week it will act up. Thanks -Nick > > |
Re: TJ gas gauge problem
Could also be crudded up connector up by the sending unit on the gas tank.
It gauge works by resistance. The more resistance the emptier the tank. Corrosion will cause resistance and hence false readings. If you try this, disconnect the battery first. If you lie on your back with your head by the drivers side rear shock and look up you will see the wiring running up and over the front of the tank. Its a pain but you can reach up in there, disconnect the wiring, clean it and pile on the dielectric grease (the jeep owners friend :-) ). Just did this on my 2000 for the same reasons. There's a web link around somewhere that documents this with pix for various sensors and gauges. I don't have it off hand but Google should find it... Regards Warren "NickT" <nickt.remove@hvc.rr.com> wrote in message news:QDq0c.28062$H17.1379@twister.nyc.rr.com... > Hi guys, > 98 TJ. My gas gauge sometimes gives low readings. Early on I had a general > problem with the gauges and airbag light. I did the procedure recommended > here of slightly bending all the contacts. It worked fine and the gauges > never went dead again and the airbag light never comes on. I do continue to > have an occasional problem with the gas gauge. It will either read a half > tank when I'm full or empty when I'm below half. No amount of smacking the > dash will clear it. I have driven forward and reverse doing 'brake checks' > in an attempt to jostle the tank sender. Nothing like that clears it. > However, simply turning the ignition key off and back on will almost always > clear it up. I know about the gauge test trick, but its hard to catch it in > a failed condition because turning the key on and off fixes it. Its almost > like there is a relay or something electromechanical feeding that circuit > that makes better contact after getting the key turned off and on. Can't see > anything obvious in the wiring diagrams. Any ideas? Its not a big problem, > maybe once a week it will act up. Thanks -Nick > > |
Re: TJ gas gauge problem
Nick, say the bag light came on with the faulty readings.
God Bless America, ßill O|||||||O mailto:-------------------- http://www.----------.com/ Warren Quin wrote: > > Could also be crudded up connector up by the sending unit on the gas tank. > It gauge works by resistance. The more resistance the emptier the tank. > Corrosion will cause resistance and hence false readings. If you try this, > disconnect the battery first. > > If you lie on your back with your head by the drivers side rear shock and > look up you will see the wiring running up and over the front of the tank. > Its a pain but you can reach up in there, disconnect the wiring, clean it > and pile on the dielectric grease (the jeep owners friend :-) ). > > Just did this on my 2000 for the same reasons. There's a web link around > somewhere that documents this with pix for various sensors and gauges. I > don't have it off hand but Google should find it... |
Re: TJ gas gauge problem
Nick, say the bag light came on with the faulty readings.
God Bless America, ßill O|||||||O mailto:-------------------- http://www.----------.com/ Warren Quin wrote: > > Could also be crudded up connector up by the sending unit on the gas tank. > It gauge works by resistance. The more resistance the emptier the tank. > Corrosion will cause resistance and hence false readings. If you try this, > disconnect the battery first. > > If you lie on your back with your head by the drivers side rear shock and > look up you will see the wiring running up and over the front of the tank. > Its a pain but you can reach up in there, disconnect the wiring, clean it > and pile on the dielectric grease (the jeep owners friend :-) ). > > Just did this on my 2000 for the same reasons. There's a web link around > somewhere that documents this with pix for various sensors and gauges. I > don't have it off hand but Google should find it... |
Re: TJ gas gauge problem
Nick, say the bag light came on with the faulty readings.
God Bless America, ßill O|||||||O mailto:-------------------- http://www.----------.com/ Warren Quin wrote: > > Could also be crudded up connector up by the sending unit on the gas tank. > It gauge works by resistance. The more resistance the emptier the tank. > Corrosion will cause resistance and hence false readings. If you try this, > disconnect the battery first. > > If you lie on your back with your head by the drivers side rear shock and > look up you will see the wiring running up and over the front of the tank. > Its a pain but you can reach up in there, disconnect the wiring, clean it > and pile on the dielectric grease (the jeep owners friend :-) ). > > Just did this on my 2000 for the same reasons. There's a web link around > somewhere that documents this with pix for various sensors and gauges. I > don't have it off hand but Google should find it... |
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