Rear wiper I can't find where to refill my rear wiper reservoir with more washer fluid. I bought this venture used and later discovered there was no manual, so I'm searching blindly through the rear and under the hood but with no luck.

From the 2013 operators manual;

Push the windshield wiper lever forward to spray washer fluid on the rear window. The lever returns to its starting position when released.

The windshield washer reservoir is used for the windshield and the rear window. Check the fluid level in the reservoir if either washer is not working.

on rear washer refill,raise back hatch,look to the the left,you will see refill plug

I'm pretty sure that they share the same reservoir.

It can do harm to seals (the alcohol in washer solvent) I'd flush cooling system and refill w/ new anti freeze.

One can get a repair kit that includes a new motor pump and wiring clips, or

one can get the original motor that plugs into the windshield wiper fluid reservoir.

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Windshield wiper reservoir (gives idea of how to change the windshield wiper fluid pump motor) Removal & Installation To Remove:

1. Disconnect and isolate the negative battery cable.
2. Raise and safely support the vehicle.
3. Remove the right front wheel and splash shield.
4. Disconnect the electrical connectors from the pumps and detach the rear washer hose.
5. Place a drain pan under the reservoir if it contains fluid.
6. Disconnect the front washer hose at the wiper unit in the engine compartment. NOTE: The front hose will be removed with the reservoir.
   
7. Let the fluid drain from the reservoir.
8. Remove the mounting screws and the reservoir.

To Install:

1. Install the fluid reservoir with the mounting screws.
2. Connect the front washer hose in the engine compartment.
3. Connect the electrical connectors and rear washer hose.
4. Install the splash shield.
5. Install the right front wheel.
6. Lower the vehicle.

I would venture a guess that the washer solvent might have been cross contaminated in a container before it was added to your vehicle. As an example: Someone may have used a contaminated container and added solvent to it such as a 55 gallon drum (bought in bulk) as a service station, dealership, or other such establishment, and not from a sealed one gallon container.

what is P13K?

check the fuse first. dealer can hook up NGS Tester and get fault codes to see what is wrong.

Principles of Operation
NOTE: The generic electronic module (GEM) will not activate the rear wiper system if either the liftgate or the liftgate glass is ajar. If either the liftgate or the liftgate glass becomes ajar while the rear wiper is in operation, the GEM will park the rear wiper motor.
There are two distinct modes of wiper operation:

• Off Mode: In this mode, there is no rear wiper activity, and the wiper motor will be in the PARK position.
• Interval Mode: This mode is selected when the rear wiper switch is in either the Interval 1 or 2 position. When this mode is selected, the rear wiper motor is driven up onto the glass by activating the rear wiper UP relay. When the wiper motor HIGH/LOW/PARK position input reaches the high position, the UP relay is deactivated and the DOWN relay is activated to reverse the wiper motor direction. When the wiper motor reaches the LOW position, as determined by the HIGH/LOW/PARK position input, the GEM deactivates the DOWN relay and will begin a new wiper cycle 1 to 10 seconds later, depending on the interval position selected.

To engage the rear window washer, rotate the rear window washer selector downward to the WASH position. The rear window wiper will run as long as the WASH position is selected. When the rear window washer selector returns to the OFF, INT 1 or INT 2 position, the washer will stop immediately, but the rear window wiper will continue for two to three sweeps and then return to its previous mode of operation.
The low washer fluid indicator chime warns that the washer fluid level is low. The low washer fluid indicator chime is a single tone with a duration of one second. The chime will sound when the low washer fluid indicator is initially activated.
The low washer fluid indicator warns that the fluid level in the washer reservoir is low. The low washer fluid indicator will illuminate when the washer fluid level is low and the ignition switch is in the RUN position.
The low washer fluid indicator will deactivate when the washer fluid reservoir is filled and the ignition switch has been cycled from RUN to OFF, then to RUN.
Inspection and Verification

1. The wiper/washer system is a generic electronic module (GEM) controlled system; refer to Section 419-10 .

1. Verify the customer concern by operating the wiper/washer system.

1. Visually inspect for obvious signs of mechanical and electrical damage.

Visual Inspection Chart Mechanical Electrical

• Hoses to windshield washer pump
• Wiper linkage

• Fuses 6 (5A), 8 (5A), 15 (5A), and 20 (5A)
• Wiring harness
• Loose or corroded connector(s)
• Relays
• Motors
• Multifunction switch
• Washer fluid level switch

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• The wipers are inoperative — rear

• Fuses 6 (5A), 8 (5A), 15 (5A), and 20 (5A).
• Circuitry.
• GEM.
• Multifunction switch (wiper/washer switch).
• Rear wiper up relay.
• Rear wiper down relay.
• Rear wiper motor.

This comes directly from the owners manual.
Checking and adding washer fluid for the liftgate
Washer fluid for the liftgate is supplied by the same reservoir as the front windshield washer.

U may have a kinked supply line at the tailgate.

keep looking,its there have you removed the plastic cover?

if i am not mistaken it uses the same reservoir as your windshield washers. if its not working it may be plugged or malfunctioning.