Turn Signals

[TJAndriesen]

I recently purchased '82 930 Turbo and when I got it the turn signals didn't work. I just replaced the relay, which I assumed would be the problem, but still no signals.

I'd note the emergency flashers DO work and all 4 corners flash so I'm assuming it's not a bad bulb in the system.

Any ideas?

[Dpmulvan]

Check the switch

[fintstone]

The hazard lights are powered separately.

The larger cable (group of wires) coming off your turn signal assembly has a plug at the end where it plugs into the bulkhead. Sometimes it gets partially pulled out. If you have not already, unplug it and plug it back in, making sure it seats properly.

Do your brake lights work?

[sugarwood]

Pics of high beam turn signal replacement (and steering wheel and headlight switch)

[fintstone]

My advice would not be to replace the switch without significant troubleshooting unless you have money to burn. It is not usually the cause of these symptoms...but is now and then.

[Tea Tray]

I don’t have a schematic for your car so…
If you are new to the air cooled world the first place to look is the fuses and fuse holder connections.
The biggest issue with the original fuse/holder design is contact cleanliness and spring tension between the fuse/holder
Take a fuse out and look at the cone/ends for corrosion or guck. Also check the holder connections for cleanliness and very importantly, spring tension.
The fuses clean up easily with a scouring pad. Makes sure you disconnect the battery if you use a small wire brush to clean the fuse holders.

[targa80]

In the past I have spent a lot of time isolating a turn signal fault in my 80SC. Since you have the 4-way flashers circuit working then your issue is limited to the turn signal circuit. The below link will provide you with the schematic that should be accurate for your 1982 model. If you are not confident in using the schematic and do not have electrical troubleshooting skills then I would highly recommend you find a qualified auto electrician to help you isolate the fault instead of just replacing parts. If you do have DIYer skills then post what you have done and ask questions.

On the schematic fuse 17 provides power to the flasher relay on pin 49 when hazard switch is activated. The Flasher relay pin 49a supplies a 12V square way signal to pin 49a on hazard switch and feeds thru pins L and R the square wave 12 V power signal to all the flashers when activated. The hazard switch functions properly so not a part of your issue. Fuse 11 provides 12V power to pin 49 on the flasher relay when hazard switch is not activated. The 12V square wave from relay on 49a needs the turn signal switch to be activated to activate the left or right signal lights. This is where you need to check for the 12 volts square wave signal through the turn signal switch. On a volt meter it would be an timed intermittent 12V signal.

https://forums.pelicanparts.com/porsche-911-technical-forum/819548-flasher-hazard-mods-my-80sc.html

[fintstone]

Note that fuse 11 (that supplies power to the turn signals but not the hazard lights) also supplies the back up lights..so even if you don't have mad electrical skills, you can look to see if those are out. It went to brake lights in my older car.

[targa80]

Originally Posted by fintstone

Note that fuse 11 (that supplies power to the turn signals but not the hazard lights) also supplies the back up lights..so even if you don't have mad electrical skills, you can look to see if those are out. It went to brake lights in my older car.

Good suggestion it will tell him if fuse 11 is supplying 12V without touching anything on flasher circuit. So if the backup lights don’t work then he probably has a blown fuse at 11. If the backup lights do work then he’s back at flasher relay pin 49 and fault isolating threw the remainder of directional flasher circuit.

[TJAndriesen]

Thanks! I've been away forr the weekend but will try these ideas as soon as I can.

The brake light do work but I need to check the backup light tomorrow.

[fintstone]

Great. I was wrong about the brake lights for your car...the schematic shows it as the backups (off
fuse 11 for your year) that and some of the suggestions above should narrow it down a bit. Could be a fuse or a loose wire at the fuse (11) (or as noted earlier, where the cable from the turn signal is plugged into the bulkhead down near your feet might be slightly pulled out).

Good luck.

[TJAndriesen]

#11 fuse was toast....

[fintstone]

Thought that was it. Congrats!

[JSV798]

Had the same problem with my 1978SC 3 years ago. Eventually tracked it down to a poor contact on fuse 11.