P38A Headlight wash and wipe malfunction

cornishboater · May 25, 2019

Still ticking things off the endless list. I replaced all 3 pumps in the washer bottle as the rear window and headlight washers did not function. Before I reassembled I thought I would test them, still no rear and headlight wash, I also noticed that the headlight wipers were not going. I have checked the relevant fuses/relay and they are fine. I have attached a DVM to the connectors and there is no voltage when operating the switches. The windscreen wash is fine and the screen and rear wiper work fine. Before I start to rip everything apart is there a common connector hidden somewhere that would account for these non functioning items? The low level warning also doesn't function, however, it hasn't since I have had the old girl (11 years) the other items did however. Any ideas?

Rubberknees · May 25, 2019

Correct me if Im wrong but don't headlight wipers only work every 3rd go when main wipers working. Was my understanding any anyway Will stand to be corrected as am not too sure . Mine only work when main ones on anyway

Grrrrrr · May 25, 2019

Rubberknees said:
Correct me if Im wrong but don't headlight wipers only work every 3rd go when main wipers working. Was my understanding any anyway Will stand to be corrected as am not too sure . Mine only work when main ones on anyway

Not got them on mine but that does ring a bell. Maybe RTFM?

dubbleRR · May 25, 2019

And the headlights on

RangeRoller dt · May 26, 2019

I have them on my ‘95 DT. Odd since DT’s tend to have low line becm, but HL wipers work off the high line becm?

They only go every few times the front wipers and lights are on as mentioned above. Maybe there is error with becm, maybe motors are fooked, maybe they work but you’ve not noticed,

do your headlights get dirty??

wammers · May 26, 2019

Headlamps must be on. Headlamp wash/wipe will work on first then every third application of windscreen wiper.

RangeRoller dt · May 26, 2019

I can tell when mine are working as they sometimes sit slightly different after they’ve been on. Think the jets don’t work though as there are no water marks left like other jet areas

Grrrrrr · May 26, 2019

RangeRoller dt said:
I can tell when mine are working as they sometimes sit slightly different after they’ve been on. Think the jets don’t work though as there are no water marks left like other jet areas

Sometimes there's real weird gummy crap in the pipes. Might get lucky with a dental pick at the nozzles.

RangeRoller dt · May 26, 2019

Yeah it’s weird green gummy stuff. It was covered in lichen-ey stuff all over when I had it as was standing for few years in a corner, it’s all come off except the headlight wiper areas. Sure it’s alive

cornishboater · May 27, 2019

Finally managed to sort the headlight wipe/wash issue sorted, some bad wires (how unusual...)
The rear screen wash is still a no go, new pump installed (and tested) but no joy, there is no voltage at the connector when the button is pressed. I was hoping that the corrected wiring issue would resolve it but alas poor Yorick, this was not to be

RangeRoller dt · May 27, 2019

Thought my rear washer didnt work, after a year it started to dribble now, is just really really blocked no matter what I stick in there

stemac33 · May 27, 2019

Test the voltage going to and from the button on the wiper stalk. Mine was a bad switch

al-one-arm · May 27, 2019

there is a non return valve in the piping , in behind the rear light cluster passenger side

P38A Headlight wash and wipe malfunction

cornishboater

Well-Known Member

Rubberknees

Well-Known Member

Grrrrrr

Technician, Bodgit & Scarper Ltd

dubbleRR

Well-Known Member

RangeRoller dt

Well-Sprung Member

wammers

No longer with us, RIP

RangeRoller dt

Well-Sprung Member

Grrrrrr

Technician, Bodgit & Scarper Ltd

RangeRoller dt

Well-Sprung Member

cornishboater

Well-Known Member

RangeRoller dt

Well-Sprung Member

stemac33

Well-Known Member

al-one-arm

Well-Known Member

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