My windshield wiper fluid is full, but every 15-20 minutes I get the beep
beep beep , which is the sound I would get if the fluid were low. I also
occasionally see a very very short flash on my control console "Wiper Fluid
Low."

I assume this is from a bad sensor ? Will I have to replace the bottle
itself , or is the sensor removable, and replaceable ?? I guess I will
have to get the bottle or sensor from my Jeep dealer, right ?

Any comments will be appreciated !!

Merry Christmas !!!

James

"DougW" <I.only.read.usenet (AT) invalid (DOT) address> wrote

Try cleaning the connector and making sure the little floaty thing
is floating and not stuck.

--
DougW

" little floaty thing" being the techincal term, of course ;¬D

K

On Thu, 25 Dec 2008 09:28:12 -0600, "DougW"
<I.only.read.usenet (AT) invalid (DOT) address> wrote:

***************
As my reservoir appears to be blow-molded, the electrical bits are not
integral and it looks like they should be replaceable separately. I
haven't check with my friendly Mopar parts guy to see it the sensor is
sold separately. Reading below, it doesn't look like it can be
calibrated, it works or it doesn't and if not functioning, replace it.

Here's a cut / paste from the factory service manual, I'll a copy of
the JPEGs in alt.binaries.pictures.auto.4x4

reboot

From the WJ FSM ...

Description
The washer fluid level switch is a single pole, single
throw reed-type switch mounted near the front of
the washer reservoir, forward of the two washer
pump/motors (Fig. 17). Only the molded plastic
switch mounting flange and connector receptacle are
visible when the switch is installed in the reservoir.
A short nipple formation extends from the inner surface
of the switch mounting flange, and a barb on the
nipple near the switch mounting flange is press-fit
into a rubber grommet seal installed in the mounting
hole of the reservoir. A small plastic float pivots on
the end of a bracket that extends from the switch
nipple formation. Within the float is a small magnet,
which actuates the reed switch. The washer fluid
level switch cannot be adjusted or repaired. If faulty
or damaged, the switch must be replaced.

OPERATION
The washer fluid level switch uses a pivoting,
oblong float to monitor the level of the washer fluid
in the washer reservoir. The float contains a small
magnet. When the float pivots, the changing proximity
of its magnetic field will cause the contacts of the
small, stationary reed switch to open or close. When
the fluid level in the washer reservoir is at or above
the float level, the float moves to a vertical position
and the switch contacts open. When the fluid level in the washer
reservoir falls below the pivoting float,
the float moves to a horizontal position and the
switch contacts close. The switch is connected to the
vehicle electrical system through a dedicated take
out and connector of the left headlamp and dash wire
harness. The switch receives a five volt reference signal
from the Body Control Module (BCM) through
the washer fluid switch output circuit. The switch is
grounded at all times through another take out of
the left headlamp and dash wire harness with a single
eyelet terminal connector that is secured under a
ground screw near the top of the left front fender
inner shield in the engine compartment.
When the switch closes, the BCM senses the voltage
change on the circuit. The BCM is programmed
to send low washer fluid messages to the Electronic
Vehicle Information Center (EVIC) over the Programmable
Communications Interface (PCI) data bus. The
EVIC is programmed to respond to this message by
displaying the Washer Fluid Low warning and sending
a chime request message back to the BCM over
the PCI data bus. Then the BCM generates an audible
chime tone warning. A resistor within the washer
fluid level switch allows the BCM to monitor and
diagnose this circuit. The BCM will store a Diagnostic
Trouble Code (DTC) for any fault that it detects.
For retrieval of this fault information and further
diagnosis of the washer fluid level switch, the BCM,
the EVIC, the PCI data bus, the BCM message outputs
to the EVIC that control the Low Washer Fluid
indicator, or the EVIC message outputs to the BCM
that control chime service, a DRBIIIt scan tool and
the appropriate diagnostic information are required.

REMOVAL
The washer fluid level switch can be removed from
the washer reservoir without removing the reservoir
from the vehicle.

(1) Disconnect and isolate the battery negative
cable.

(2) Remove the one screw that secures the washer
reservoir filler neck to the left inner fender shield.

(3) Raise and support the vehicle.

(4) Remove the liner from the left front fender
wheel house.

(5) Disconnect the washer hose from the barbed
outlet nipple of the rearmost (front) washer pump/
motor unit and allow the washer fluid to drain into a
clean container for reuse.

(6) Remove the two screws that secure the inboard
mounting flange of the washer reservoir to the left
inner wheel house.

(7) Pull the bottom of the washer reservoir rearward
far enough to access the left headlamp and
dash wire harness connector for the washer fluid
level switch on the front of the reservoir

(8) Disconnect the left headlamp and dash wire
harness connector for the washer fluid level switch
from the switch connector receptacle.

(9) Using a trim stick or another suitable wide
flat-bladed tool, gently pry the barbed nipple of the
washer fluid level switch out of the rubber grommet
seal on the front of the reservoir (Fig. 18). Care must
be taken not to damage the reservoir.

(10) Remove the washer fluid level switch and
float from the washer reservoir.

(11) Remove the rubber grommet seal from the
washer fluid level switch mounting hole in the
washer reservoir and discard.


INSTALLATION

(1) Install a new rubber grommet seal into the
washer fluid level switch mounting hole in the front
of the washer reservoir. Always use a new rubber
grommet seal on the reservoir.

(2) Position the float of the washer fluid level
switch through the rubber grommet seal in the
washer reservoir (Fig. 18). The connector receptacle
of the washer fluid level sensor should be pointed
downward.

(3) Press firmly and evenly on the washer fluid
level switch until the barbed nipple is fully seated in
the rubber grommet seal in the washer reservoir
mounting hole.

(4) Reconnect the left headlamp and dash wire
harness connector for the washer fluid level switch to
the switch connector receptacle.

(5) Reconnect the washer hose to the barbed outlet
nipple of the front washer pump/motor unit.

(6) Install and tighten the two screws that secure
the inboard mounting flange of the washer reservoir
to the left inner wheel house. Tighten the screws to
7.4 N·m (66 in. lbs.).

(7) Reinstall the liner into the left front fender
wheel house.

(8) Lower the vehicle.

(9) Install and tighten the one screw that secures
the washer reservoir filler neck to the left inner
fender shield. Tighten the screw to 7.4 N·m (66 in.
lbs.).

(10) Fill the washer reservoir with the washer
fluid drained from the reservoir during the removal
procedure.

(11) Reconnect the battery negative cable.

Thanks a lot reboot !!!


James

Thanks Doug !! Yes, I am going to try to disconnect the sensor today, and
see if that stops the error. And, the Chrysler Parts Direct side would be a
good source for the part.

Thanks again !!

James

What's that Lassie? You say that DougW fell down the old
rec.autos.makers.jeep+willys mine and will die if we don't mount a
rescue by Thu, 25 Dec 2008 21:09:25 -0600:

It's a reed switch AND a resistor. The resistor is across the switch,
so the computer can detect a wiring fault/unpluged connecter.

The computer should:
sense the resistor when bottle is full,
sense a closed connection when low,
sense a open connection if unplugged/busted wire.
--

Dan H.

What's that Lassie? You say that DougW fell down the old
rec.autos.makers.jeep+willys mine and will die if we don't mount a
rescue by Sat, 3 Jan 2009 20:50:04 -0600:

They probably show just the combined unit, as it would have to be
replaced as one piece. But it would be nice to know about for when
your trying to pin down a fault.
--

Dan H.