ladies and gentlemen this is Keith from iRepair Autos. A subscriber/viewer on
YouTube has sent a request why is my coolant level warning light
constantly coming on even though his coolant level is at the right level
let's take a look let's get this solved and let's get our cars running great again
let's get started don't forget to Like share and subscribe thanks
alright so locating your coolant reservoir right here on the driver side
of the vehicle this is your cover what we want to look at is this connection
right here this is our sensor connection so I would suggest that you first check
to make sure that this sensor in action properly seated observe it for any
broken wires they should not be any broken wires the sensor lives on the
inside now only check this when it's cold my vehicle's been sitting overnight
so what you would want to do is when you're checking your coolant level your
coolant level should go up to the white line no higher than the white line
that's the proper level of your coolant so that's the first thing you want to
check it may just be low if it's low fill it up to the line when you tighten
it back tighten it so that it clicks into place now I have an older module
older reservoir here that have replaced in the past this is not a replaceable
part this is one complete unit if the sensor / float is bad on the inside of
this module the best option for you is to replace the whole piece I have a
video showing you how to do this check up in the upper right corner for that
link and just get this part replaced in order to test the reservoir the
circuitry inside the reservoir we're going to need a battery source I'm going
to use this observer your battery 12 volts then you need a voltmeter I'm
gonna use some alligator clip on both sides and I've stopped up both of these
ports on the reservoir with grapes you could use rubber gaskets if you have
them so what we're going to do is we're going to connect the power source to
these leads which go down to the sensor on the inside so I'm going to connect
the red lead to the one of the leads on the inside making sure that it only
touches one there's none in charging the one on the left then I'm going to
connect that to the positive side on the battery and then going to connect to the
negative on the voltmeter what I'm gonna then do is connect the other side to the
battery and essentially what I'm gonna do
turn the voltmeter on so we get a reading put it on full DC there's more
water inside this container so we're gonna connect it while keeping an eye on
the voltmeter it's reading in millivolts very tiny reading touching the other pin
to close the circuit there is no movement in terms of real voltage on the
reading on the world meter it's like in a millivolts so that's the
correct reading that we should get when this is empty I'm gonna fill it up with
water filled with water so we've got a pin connected on one side we can see our
voltage on the other side there's water on the inside and we got voltage should
see 12 volts 12 point 4 volts so let the water out what's the voltage that the
water comes out go back go into millivolts less than 12 volts empty and
that would trigger your coolant low message on the cluster if you do that
test on this device and it's giving you zero volts or voltage in the millivolt
range the sensor which is inside is no good non-replaceable part you gotta buy
this whole new unit as always everyone don't forget to Like share subscribe
thanks and peace out