Member - Beatit (QLD) replied:

Have you got it on intermitent on the dash switch?

Kind regards

Member - John L G replied:

V8

Good luck with your attempts to fix this.

I have similar wipers on my launch and you will find there are either two power feeds to the motor that drives the blades or an internal switching mechanism in the motor housing.

It would seem that one circuit gets the whole thing started and the other actually powers the mechanism. When the power is turned off it still gets a feed to allow the motor to return to the parked position.

Mine has been on the blink for aeons and all sorts of sparkies have had a go and failed. I think its a bit like wiring a trailer loom without any destructions - and we all know how much fun that is!!!!!!!!!!

GUPatrol replied:

V8Diesel,

The wiring that supplies the return to home power for all wipers is different and from a different source. therefore you cannot rule out faulty wiring.

The return to home power (or park) is always there and disconnects when a certain position is encountered on the gear (not the motor).

So it looks like power to the motor (from the switch) works when the door is open, the wiper moves, as soon as it moves the return to home or park wiring takes over and supplies power until the switch on the park position turns it off.

Look for a faulty wiring on the supply

Will

V8Diesel replied:

Next question.

On a 100 series, where is the upper tailgate operated switch for the rear interior light located? I can't seem to find one like the doors have (eg: the littel rubber 'nipple' with micro switch). Would it be a magnetic proximity switch or something similar?

I think it is switch related as it happens just as the tailagte closes in exactly the same spot each time. I can't make it happen any other way.

All help appreciated. Thanks

V8Diesel replied:

OK, I have just taken the trim off the upper tailgate and had good look around in there. The switch that is telling the wiper motor to turn off is located in the lock mechanism as you mentioned. I couldn't see anything obvious like pinched wiring or loose plugs, so I gave it all a good wriggle and seperated the plugs a few times.

No difference, so I thought I'll have to take it to a sparkie when it suddenly decided to work again. You beautie! But.....put the trim back on, all still fine then tried the switch again as I was locking the car up and the bloody thing decided to stop working again.

Something funny going on. I'll report back once it's sorted.

Cheers

Moz replied:

Good chance that it is faulty wiring.
Look for the harness going from the tailgate to the body and pull back the conduit around the harness. Look for damage to the wires around where it flexes during opening and closing.
And remember the inner core copper can be boken even though the outside insulation is fine. Go along the wires systematically 'wiggling' each part until you think you have found a break probably in the supply wire to the park switch.

Good luck!

Cheers Moz