rear wiper issue

hi there can someone help

my rear wiper dont work now i have feed to and from the switch and on the plug at the wiper motor i have voltage on the midle wire

you have a brown and yellow (neg i belive) green and orange (14 volts if the switch is on or off??) and last green and brown (that has nothing and also has continuity through to the bwown and yellow??)

note: the door was open

is this correct?

i am guessing the relay is on the passenger side, which one is it from the door to the foot well i have yellow relay, yellow relay, green relay and brown rely holder and a yellow relay?

cant find anything in the haynes book nor was the wireing colours correct? i have done a search but cant find any thing.

its a 1996 300 tdi

any ideas gratefully recived as im

The rear wiper will only work with the drivers door SHUT!

ok door shut still not working

still voltage on the center pin?

removed the wiper switch i have voltage on pins 2,4 and 5???? of the plug

tested the switch

off:
pins 2 and 5 bell out on continuity

0n:
pins 1 and 4 bell out
pins 2 and 5 bell out

im confused?

try this: shut all doors, sit in drivers seat, push rear wipe button

Haynes manual wiring diagram no19 : interior illumination and multi function unit - 1995 on

Look at K8 rear screen wiper switch connection to multi function unit (orange & blue coloured wire)

The multi function unit controls the rear was wipe via the rear wash wip relay (G8 on the diagram)

done that and while in there i can hear the relay clicking in so that part is working so im now guessing its the wiper motor failed.

:mil25::mil25:

Yep sounds like it mate! Check the earth from the motor in the rear door (turn off ignition and using multimeter on ohms scale from motor body to known good body earth - looking for 0 ohms)

will do thanks for the door thing never thought that would be an issue will look at the haynes diagram as well

Yep i thought mine was broken til i searched on here and found that it won't work unless the drivers door is shut before you press the rear wipe button

well checked it to the brand new exhaust (not the bestist place but better than any where else i could find. it gave out 3 ohms on the 3 set of nuts i found it to be 6.8 ohms and they wewr the cleanest ones i could find

thanks for your help

For a good earth it should be 0 otherwise you have 6.8ohms of resistance between the body earth and the motor

I know this has already been said, but mine required both front doors to be shut & the interior light to extinguish before working. I won't tell you how long it took me to work this out, but I used to have hair!!!

Could it be the dreaded 'dry joint' syndrome like the rear windows?? Just a thought