Question about 2004 Ford F150
Both units move as I drive but because they never reset the speedometer always shows excessive speed and the temp always shows hot.
Posted by Anonymous on
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Posted on Jan 02, 2017
it may have a static charge in the instrument cluster,try un-hooking the battery then turn the key on and even hit the brakes to try to drain the spark out of the system,hooking the 2 cables together with the battery disconnected may work as well to drain it.hook up the battery and see what happens,but make sure the key is off and nothing is on-lights,radio,wipers etc,it could send a spark to the computer.
Posted on May 31, 2009
You could try another oil pressure sensor or test the oil pressure with a gauge at the sensor port. If you think about it, the truck goes into a failsafe mode when there is a problem. You could go into failsafe with high temperatures too. The water temp sensor could be bad but with the oil light coming on, the oil sensor should be your first choice.
You can get a free scan at Autozone or Oreillys and it may show the problem. Sometimes it takes a better scan with dealership type diagnostics because the self-diagnostics on your truck is limited.
Failsafe mode would cause the power loss because the truck is designed to kill cylinders and to use the dead cylinders as hot exhaust pumps to cool the block.
Posted on Jan 11, 2010
SOURCE: i have a 1988 ford
could be the guage itself, the sending unit for those guages or the wiring in between. find the sending unit, should be two wires the sending unit actually changes the amount of voltage going to the guage. cross the two wires over at the sending unit, the guage should read all the way in one direction, do this for both guages. if the guage moves to an extreme position when the wires are crossed the guage and wiring are fine and the sending unit is the culprit. if you cant get the guages to move by crosing the wires, suspect the guage itself. find you a freindly garage to help w your repair. hope this is useful
Posted on Aug 02, 2011
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