Hi

Not long had my 86 Euro 928S2 and trying fix the numerous electrical woes. I've got the shop manual CD but can't find a drivers handbook. I've looked at the old posts but there doesn't seem to be any consensus on what light switch is supposed to operate what. Can anyone tell me if mine are doing the right thing and suggest a fix for the rear fogs.

At the front, the top left light switch at position 1 operates a marker light in the outer lamp. The bottom left button then makes the outer lamp brighter, which looks like a fog setting. The middle button then makes the outer lamp brighter still like a driving light. The inner front only ever comes on with high beam and does the flash function.

At the rear, the fogs come on with the marker lights at position 1 on the top left. This is regardless of what I do with the other buttons. Clearly this is not good and I have had to remove the bulbs from the rears to avoid the attention of the local constabulary. I've looked for evidence of loom butchering but can't find any.

Any ideas how to get the rears to operate from the correct button, which I assume is the lower left one.

Thanks

Andrew

 

on you pod the switches are for top left parking lights pos 1 headlights pos 2.

2nd down should be front fog lamps with either parking lights or head light on

The lowest switch is for the rear red light in the bumper this should also come on with the headlights and possible the parking lights.
The inner driving lights should come on with the head light stalk in the hi beam position and headlights on

 

Ok, thanks. Sounds like someone has been playing behind the switches so I'll pull them and have a look.

 

I've never heard of 928s having rear fogs -- at most they shipped with one rear fog light. The front inner lights on euro are driving lights, not fog lights. That's why they come on with the high beams.

Can you take a pic of your pod switches and either describe which lights do what more carefully, or take some pics?

 

Dave the rear lights are for reduced visibility as you probably know, If you examine the harness on the inside of the rear PU you will find that there are 2 wires and 2 stand offs for the fitment of 2 rear facing RED lamp housings,

 

Andrew

Tell us where you are and if the car is RHD or LHD.

If a RHD UK delivered (and possibly LHD delivered in Europe) Euro S2 your description I think sounds possibly correct but someone has changed the front and rear fog light buttons.

Merlin is correct in his button layout.

Function should be as follows. (runs out to garage to play with lights to be certain)

Headlight switch (top rotary witch) off no lights should work other than indicators (turn signals) and brake lights. pull stalk to flash - inner front lights should light up bright pushing stalk does nothiing

Headlight switch to position 1 (ie one click clockwise)
dim yellow glow from front outers, and rear tail lights should be on.
push front fog light switch and front outers should light bright.
push rear fog light switch and more red light at the rear.
turn off front fog light switch and both front and rear fogs should go out. (rear fogs only work if front fogs are on and lit)
Pull stalk and inner fronts light, pushing stalk does nothing

Turn Headlight switch to position two (second click clockwise)
Only difference from position 1 is that headlights pop up and light the dipped beam (known as something else in the US but these are the beams that don't blind drivers coming towards you)
Pull stalk and the headlights will either remain on dipped beam or switch off dipped beam (could be either)but also light the main beam (aka something else in the US but these are the ones to tell cars coming towards you "GET OUTTA MY WAY) and the inner lower lights illuminate.

The only other anomaly that could be correct depending on model year and country of delivery I can think off is that the front and/or rear fogs (if lit) could go off if stalk is pushed forwards to light the main beam.

Clear as mud EH!

 

Hi Andrew,
On my 86 Euro, the front fog lights(middle switch) only turn on if the headlights are on (pos 2 on top switch), and the rear fogs (bottom switch) only turn on if the front fogs are on.

 

Exactly like my 83S Euro
Regards

 

First ROW (its not really just Euro) cars lighting is very different than USA cars. All model years had similar switchgear but different exact external lighting (# bulbs filaments/ combo's etc - ROW car again different than USA)

For most all ROW cars I believe the fogs always stay on in highbeam (USA/Japan goes off), rear fogs are unaffected by front high beams as you'd expect.

The headlights are ALWAYS either low beam or hign beam NOT both.

Jon's description is otherwise (and as usual) great. Note that with lights off and ignition off the turn signal stalk controls parking lights - just the marker lights on the side selected.

Alan

 

The front fog behaviour is not correct - someone has messed with it...

Think about it... foglights that only come on with headlights are by definition NOT foglights... The rear fog behaviour is correct.

Alan

 

Alan, euros have driving lights, not foglights as I mentioned above -- behavior is different.

About the rear foglight(s) -- I have never seen a shark with two foglights on the rear.. anyone have a pic? Maybe there was wiring in two places so a foglight could be mounted on either side, but I have only seen them on the left side.

 

Dave there is a poster on here (from europe or the UK)not sure where that has a blue 928 with both of the rear fog/warning lamps installed and they have a picture posted its in their avatar.
Not sure who it is???

 

Just checked- both my 88SE and 90GT have Rear fogs on both sides.
I also have 1 (of the 4) rear tail lights not working !

 

Dave - all S4+ ROW have 2 rear fogs as a dual fialment on the outer marker - earlier cars often only had 1 on the drivers side - next the the license plate (crappy location). I have seen examples of version with 2 in photos - (not sure if it varied by year or market)

All ROW S4 + cars have front & rear fogs - the switching configuration is different from USA as is the relative position (outboard fronts) and fronts are combined with a marker.

Some of the earliest cars had just a marker in place of the Aux headlights/driving lights but I thought all had fogs... thats what Porsche calls them....

An '86 ROW definitely has front fogs & Aux headlights & dual rear fogs configured like an S4

Alan

 

OK, so I was wrong about the rear fogs, and apparently the driving lights as well. I see them now on the '86 wiring diagram. Maybe the OP is confusing fogs vs driving lights, since the DL should come on with the high beams.

On the earlier cars DL vs fogs was an either-or proposition, as I discovered when looking at the wiring diagrams to figure out where to tap in for the circuit to enable the use of my fog lights as "passing lights".