RICHARD SCHADE Posted November 2, 2010 Share Posted November 2, 2010 HI I HAVE 1988 TOYOTA DOLPHIN AND THE FUEL GAGE ONLY COMES UP 1/4 WHEN FULL IS IT THE GAGE OR THE TANK UNIT OR A GROUND OR WHAT, HELP DON'T KNOW HOW TO CHECK. TAKE CARE RAS Quote Link to comment Share on other sites More sharing options...
WME Posted November 2, 2010 Share Posted November 2, 2010 Yes It could be any of the three. Check connections and grnd first. The sender is in the tank so you would have to drop the tank to check it. Quote Link to comment Share on other sites More sharing options...
Gulfstream Greg Posted November 7, 2010 Share Posted November 7, 2010 Might be some resistance readings for the sender. Maybe a Chilton's might have that answer! Quote Link to comment Share on other sites More sharing options...
Maineah Posted November 7, 2010 Share Posted November 7, 2010 Ground the yellow and red wire at the tank (I think it's pin 3) and the gauge should read full if it does it's the tank unit (most likely cause) Quote Link to comment Share on other sites More sharing options...
p10leadman Posted November 11, 2010 Share Posted November 11, 2010 yes, most likely the float switch inside the tank. the tank will have to be dropped for repair or replacement. so try to get the amount of fuel to a minimum before attempting to drop it.disconnect the battery before dropping the tank,,,,still a lot of items in the coach are 12v dc. be careful of sparks and static electricity too..... in a lot of cases the float switch can be fixed, by disassembly of the switch, bend the prong to rub on windings slightly firmer.......nothing to lose everything to gain. p10leadman@yahoo.com Quote Link to comment Share on other sites More sharing options...
toycoach Posted November 15, 2010 Share Posted November 15, 2010 HI I HAVE 1988 TOYOTA DOLPHIN AND THE FUEL GAGE ONLY COMES UP 1/4 WHEN FULL IS IT THE GAGE OR THE TANK UNIT OR A GROUND OR WHAT, HELP DON'T KNOW HOW TO CHECK. TAKE CARE RAS Hi Richard, Tried anything yet, if so, what worked? I have the same problem on my 1986 Coachman. Quote Link to comment Share on other sites More sharing options...
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