Heated Rear Windscreen Relay mystery

[jlmacd]

Heated rear window and heated wing mirrors have stopped working. Switch illuminates and 'click' heard from under the steering wheel area when switch is activated on/off. I have been wading through the posts for the location of the relay for the HRW circuit. Found one saying that it is one of the relays behind the fuseboard under the dash on the (uk) drivers side. Post identified it as the 'yellow one'

I pulled the yellow one but still a click was to be heard when the switch was turned on off. Indeed, the same was true for when I pulled (one at a time, then replaced) the other relays (didn't remove the two smaller ones shown bottom left) Can anyone correctly identify what each of the relays shown in the photo are actually controlling??

So, my question is, if this (yellow) one is not the HRW relay, where can it be found? Do I need to dismantle more of the fascia to unearth it? So far I have only removed the carpet trim below the steering wheel/ above the pedals to get in from underneath.

Also, I was unable to locate the feed for the screen element itself Does anyone know how to access this for testing? Testing with a probe light across ground and the elements themselves seems to show no power is present.

Heard tell it may be possible to test the circuit with a duplicate relay if there is such a thing available. Is there likely to be another relay on the car same as the HRW one to do this with ?

Many thanks, as ever, in advance for any help and advice.

[PeterN]

In my experience things electrical are very rarely where they say they are but a good way of checking which relay is operating is to place you finger on it and operate the switch, you can usually feel the relay operating, it could be that there is more than one in the circuit although I can't see why.

If your car is an estate it could be that the wiring has failed where it goes from the body to the tailgate, I have not had this on the Peugeot myself but it was a common fault on the Citroen estates. It could be that the earth return has broken, you can check this by connecting the meter to another earth separate from the tailgate in which case both ends of the element will read live.

Peter

[jlmacd]

Thank you Peter. I understand what you are saying but, unfortunately, mine is not an estate but the 1998 saloon GLX version. I haven't managed to locate the terminals for the screen element yet. I see from the outside that they appear to be at the bottom of the screen - can anyone confirm this? - but am reluctant to start dismantling all the back parcel shelf and trim just yet until I manage to locate and test the hrw relay first.

appreciate the reply. Thanks

[steve_earwig]

The parts diagram shows the heated rear window timer relay as yellow. However the window lifter relay is also listed as yellow. And there isn't an orange one, although from what I can make out in the picture this is just a change-over relay with a protection diode. The white one is apparently "lighting oversight" (nee-noo-nee-noo) and the micro-relays are fog lights and daytime running lights? Not sure about the other two, could be headlamp flash and maybe the interior light timer. Or is that middle one green? That would make it a shunt.

If the hrw relay can't be found there then, unfortunately, it must be somewhere else. Did you check the fuses yet?

[jlmacd]

Thanks Steve. Where does one find the parts diagram then?? Guess if I pull the yellow one again and the windows don't operate, that will pinpoint that one. What would the orange one be controlling as a changeover - any ideas?

The white one has 'vents' ,per se, slotted into it - not sure what you refer to when you mention 'lighting oversight' - could you explain further?

Micro relays - mine is a 1998 D8 Glx model. Fog lights, yes. Daytime running lights, no.

The other two are both black I am fairly sure. The apparent 'green' is just my poor picture taking (whilst contorting around in the driver footwell !)

Fuses are good. All references, thus far found. seem to point to the hrw relay living here somewhere(!). Surely can't be that mysterious....

Sorry for all the questions - and my ignorance of these matters - but appreciate all assistance being offered. Off to extract the yellow relay once again....

[steve_earwig]

Where does one find the parts diagram then??

http://public.servicebox.peugeot.com

not sure what you refer to when you mention 'lighting oversight' - could you explain further?

It makes an audible warning when you open the driver's door with the lights on.

I guess it all depends on whether a) the part's diagrams were correct in the first place and b) if none of the relays have been replaced since. By change-over relay I'm meaning it's nothing special, certainly not a timer like the one's that's (meant to be) for the heated rear window.

Ah well, it was worth a shot at the fuses. Thing is all the (questionable at best) fuse diagrams I have say other things would have also stopped working if the HRW fuse was blown (e.g. the heater) so it was a long shot.

According to a Russian Pug owner's club I found with a Google the relay looks like this

and was a bugger to find as it was hidden in the depths of the fuse panel.

Interesting

post 227 http://peugeot-club.by/board/topic/3280 ... /?p=506606

[jlmacd]

Finally solved . Wasn't the relay to blame after all. Couldn't locate the relay - despite the annoyance of hearing it 'clicking' away. I assume it lives deeper behind the steering column area but, who knows? I, for one, would love to!

Capitulated in the end and sent the car to my local mechanic (a fine and honest chap! Such a rarity these days, sadly). Transpired the fault lay in a burned out multi-connector somewhere half way down the side of the car between the relay and the HRW. Removed the plug and made good the connection again. Back in business!

Many thanks to one and all for your kind assistance along the way..