AWD - Rear tailgate washer will not work

Volvo AWD V70-XC70 Forum

INDEX FOR 7/2019(CURRENT) INDEX FOR 6/2003 V70-XC70 INDEX [<<]  [>>]


Rear tailgate washer will not work V70-XC70 2001

The washer pump fails to pump activate on my tailgate wiper.
What I have explored and verified:
There are no leaks in the system (hoses / reservoir/ couplings, etc)
The Windshield and headlight washers both work
The rear wiper, windshield + headlight wipers both work
The fuses for either washer / wiper system(s) are not burnt out
Both front and rear pumps work when each are attached to a 12Volt power supply
The rear pump motor will not work when the switch on the steering column is used to activate the rear washer / wiper feature -when doing this with a voltmeter applied to the plug for the rear washer motor, a brief reading of 3(+) volts flashes but then it will not register any voltage at all - the rear wiper runs for 3-4 swipes normally - When the same thing is done to the windshield / headlight washer feature the voltmeter registered 12(+) volts consistently when running .
Continuity of reservoir wiring harness- both positive(white/ black for rear washer pump and white for front windshield / headlight washer pump) is OK. The negative ( Black wire for front windshield / Headlight washer pump) is OK
There's NO continuity from the negative(Black wire) of the rear washer plug and the main 4 connective plug that couples each motor to the dash switch/electrical system. Between the black plug wire of the rear washer motor
plug and the main 4 connective plug is the reservoir level monitor and what looks like a crossover with 4 black wires. Bypassing the fluid level monitor still results in No continuity.
The rear washer line has been tested with a stream of compressed air and it is not clogged.
Short of replacing the rear washer relay, the steering column switch, and maybe the wiring harness directly attached to the reservoir, I am at a loss as far as what might be happening.
Does ANYBODY have a reasonable answer / idea as to what might be the problem? HELP!!


New Rear tailgate washer will not work [V70-XC70][2001]
posted by  skip9mgm  on Sat Nov 17 11:20 CST 2018 >

Cut and paste link:

<< < > >>

Users marked in green are currently online.

©Jarrod Stenberg 1997-2016. All material except where indicated.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.

All participants agree to these terms.
Powered by Denizen - Custom Software for Enthusiasts