Nick928SE

Hi !

I have an '88 (928SE) the Indicators are not working the relay doesnt click , yet dash illuminates when switched too left or right. The hazard light switch makes a click on the fuse box but the indicator relay doesnt.
I have checked all the fuses and made doubly sure by checking behind the fuse box fuse terminals , i have a box of relays and replaced multiple ones . Current situation is the Dash is out in its entirety (was reskinned) , so am checking the electrics prior to it all going back in, Car starts, windows , mirrors , exterior lights , central locking etc etc all work. The only thing that has me stumped is the indicators (oh and the windscreen wipers dont work atm, but the washer jets do btw)
There is an earth under the dash which was disconnected due to the dash being removed, this is earthed atm .

Am i missing something obvious ? or is there a common place for there to be a break in the loom ?
I do have paper copies of the workshop manual , i can figure most things out , but i am no electrician. The car was immobilized which i cut all out and am pretty sure nothing there relating to indicators/turn signals .

Any advice , greatly appreciated thanks

spare relays and '87 and '88 fuse boxes

Turn signal turns green when switched left or right

Kevin in Atlanta

Indicators go through the hazard switch. Replace the hazard switch and that should solve the indicators issue.

Good luck.

Nick928SE

I have replaced the hazard switch, unless i have 2 faulty ones. (i will def look into it again thanks)

I'll have a look for another one, though a relay does click when the hazard switch is depressed .

I've just stripped out another '88 fuse box and replaced 2 of the fuse blocks, am just looking for the best kitchen product to wash it in :P , there are 2 or 3 cut wires on the back of the original that appear to of been re-spliced in (by me 15 years ago) but one of the grey wires does go to a different location to that of the spare fuse box, so will clean this "new" one and pull the one out of the car and check each connection to the other as it eliminates one more possibility of the fault . I have the spares to fault find with so may as well use them

Allen Miles

make sure you have the correct switches on the correct plugs.I had my defroster switch plugged into my hazard switch if I remember correctly and it did exactly what your describing.this occurred after a cluster rebuild.

Nick928SE

Thanks for the advice Allen , i will double check , though my hazard switches seem to have a flat back to them with the electrical pins protruding and the socket next to it is totally different . It was however playing on my mind as it has to be something blatantly obvious !

I also found another post re indicators and saw an area of the loom that warrants examination https://rennlist.com/forums/928-foru...re-melted.html and here is an image of said melted wire https://gyazo.com/64306f521a00b84c9eafd6ecc310edda

i have a spare 1988MY fuse box , which i have now replaced some fuse holders from another fuse box and soaked it in hot diluted floor cleaner for an hour too clean it, scary the amount of green dust from the copper comes off these (though they are 30 years old) , i can at least rule out the fuse box too and take the opportunity to examine all the wiring with it out of the way.

Nick928SE

Well blow me Kevin and Allen , i have quite a few switches to play around with and i have lots of hazard switches with flat backs and lots of demister switches with flat backs ! Maybe after '88 Porsche swapped the design of the switches as i was stripping an '89 S4 (auto) in 2004 when i mechanically rebuilt my 928SE using the engine , TT gearbox and suspension from the last every 928CS that was made (was wrecked in accident) .
Anyways, i went through my piles and found opposing switches , plugged em in and i now have working indicators O.o

Thanks again, for solid advice , i was unaware that Porsche swapped things about to that extent .

I now have an as new spare '88 fuse box , HAHA

Nick928SE

Hi Kevin,
Thanks, in case you didnt see my other reply , seems i have lots of hazard switches which match the demister electrical pin pattern, so maybe Porsche changed it up in '89 maybe and swapped stuff around (as they did on a yearly basis for the fuse box)
Its all working now after doing an about turn and replacing the demister switch and hazard with opposing backs

Kevin in Atlanta

Great news indeed. The pod switch design frankly mystifies me, but along time ago I unknowingly shorted a hazard switch and ended up with no indicators.

Kevin

Allen Miles

Awesome.I tore my 82's electrical system up and down and here when I pulled the ***** off the switches I laid them out in the wrong order.needless to say I learned a lot about the electrical system and gained knowledge through my mishap with the switches.that is what makes this forum great.sharing knowledge and experiences.

Nick928SE

Allen , i'm pretty sure Porsche changed the arrangement of the sockets on the backs of the switches, as i have a pile of flat backed hazard switches and flat backed demister switches , and visa versa a pile of demister switches that look like hazard switches and i was wrecking an '89 S4 auto when i put all the 928CS stuff on the car, so i might of done the rookie mistake of picking the best looking switches and throwing them in the car. The (928SE) i kept in storage from 2005 till 2 years ago when i decided to start on the body work, so the car was never used, but we did drive it 75km in the middle of the night in 2005 when i moved house