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-   -   Turn signals do not work but Emergency Flashers do (http://forums.pelicanparts.com/porsche-911-technical-forum/644230-turn-signals-do-not-work-but-emergency-flashers-do.html)

geoff_k 12-10-2011 12:35 AM

Turn signals do not work but Emergency Flashers do
 
I did search the forums but had no luck.

I have an 83 SC ROW.

The turn signals do not work. No nothing. No indication on dash. The emergency lights do work.
I also have a problem with the headlight high beam not working and just to add to the issues a horn that does not work.

Any suggestions on where to start would be much appreciated

thanks

Geoff

bigel 12-10-2011 02:47 AM

I have the same issue with my '87...the car has a few electrical gemlins that need to be chased down. Looking forward to getting some advice.

tirwin 12-10-2011 05:32 AM

It is not uncommon to have a fried headlight switch and/or turn signal stalk.

First question. Do you have headlight relays installed? If not, buy them and install them.

When I bought my SC, the turn signal stalk was fried. Emergency flashers worked but turn signals worked whenever they felt like it.

If you don't put in the headlight relays and you replace the stalk, you run the risk of frying the new one. This is because headlight power runs through the stalk. (Not a great design). This has been discussed on the forum many times. A search should turn up plenty of results if you want to understand the whole history.

You can buy the relays, headlight switch and turn signal stalk through our host.

The 101 projects book from our host also explains the turn signal stalk replacement procedure. I would add it's a good idea to remove the driver seat unless you're a contortionist. :)

geoff_k 12-11-2011 08:07 PM

Well, I spent Sunday lookng at the issue. Noticed another flasher unit was included in the box of parts that came with the car. After much mucking around removed the momo wheel and traced a loose wire. It was an earth. When I did stick my head under the dash to look at the wiring for the flasher unit, I noticed the wiring loom was not plugged into the relay...problem fixed, lights now work , horn is excellent and indicators work.
The only issue I now have is both indicators on the instrument panel come on regardless of the indicator chosen ie left or right.
Any ideas?

Geoff

Driver_X 12-12-2011 03:28 AM

Both indicators going on is sure sign of a well-used relay. Pick up a new one from our host, it's located right behind the fuel gauge, or you can reach if from the front.

Easy fix.....

mspirito 12-12-2011 04:13 AM

Ditto relay

SweetWaterSurprise 12-13-2011 05:17 PM

Can someone please point me to which relay I may need. My turn signal stalk and headlight relays were new. I started getting the dual indicators flashing, then the Turn Signals stopped working all together. I am thinking it may just be that relay but I haven't gotten under to pull it out just yet.

Driver_X 12-13-2011 08:06 PM

Pelican Parts - Product Information: 914-618-303-11-M44

Busta Rib 12-13-2011 11:11 PM

check the fuses and also confirm the wiring at the fuse box is good. I had a similar problem and the culprit was faulty wiring at the fuse box. The fact that the emergency flashers work but not the turn signals will indicate your relay is still good so save your money buying a new one.

SweetWaterSurprise 12-14-2011 06:38 AM

Hmm, I will look into this later tonight but thank you very much for the picture. I appreciate it. I am hoping it may be a fuse or wiring issue, those are far simpler.

rnln 12-14-2011 09:54 AM

The first thing I would check is the stalk mechanism, after checking fuses.

SweetWaterSurprise 12-14-2011 11:51 AM

The stalk itself is brand new.

SweetWaterSurprise 12-14-2011 02:17 PM

Ok here is my situation. So the car has working headlights, tails, parking lights, euro emergency works, hazards work. I csn hear the relay clicking when its in hazard. But still it blows the #8 fuse when I put one in and power the car on. I haven't made any changes to the car either. Any clues?

timmy2 12-14-2011 03:33 PM

Sounds like you have a wire going to ground somewhere in that circuit. They do rub and wear off the insulation over time. Relay bases can crack and fail, Connectors can fall off too.

Use an ohmeter and check the bottom of #8 fuse holder to ground resistance with the fuse out.
If it is zero then you have a fault to ground to trace out.

SweetWaterSurprise 12-14-2011 05:53 PM

True. I'm doing my tracing work tonight again

SweetWaterSurprise 12-16-2011 11:04 AM

So I checked the wiring, found no real issue. Made sure all contacts and wires were intact and in place. Put in new bulbs front and rear, new fuse, everything worked fine. Drove the car today, no issues till I got to work. Now again the fuse is blown and no turns signals again. So odd.

arbita1 12-16-2011 11:47 AM

Did you try to trace the short circuit with a voltmeter or ohmmeter?

timmy2 12-16-2011 06:17 PM

Welcome to the world of an intermittent short...
Any chance there are wires on the new stalk chafing on the steering column or somewhere. You should probably visually check all the wires between the light switch, hazard flasher switch and turn stalk for worn or pinched insulation. Loose connectors that could touch each other as the car vibrates rolling down the road?

SweetWaterSurprise 12-17-2011 07:49 PM

^^ That makes sense as well.

SweetWaterSurprise 12-19-2011 07:49 PM

Ok So I have figured out that it's the green wire with a yellow stripe that is grounding out someplace. Where, I have no clue.

Number1_dog 12-21-2011 11:54 AM

My 2 cents worth. Check to see if the Under hood light in the back is shorting you out. My car's previous owner had cut the wires and just tucked them up into the edge of the engine hood. My second problem was to back to electrical 101, I checked with a continuity tester to see if I was getting juice across the fuse at the fuse box. I found that what looked like a good fuse was not transmitting electricity, I changed the fuse and it has been working ever since.

timmy2 12-21-2011 04:25 PM

Quote:

Originally Posted by LIVEVIL (Post 6443402)
Ok So I have figured out that it's the green wire with a yellow stripe that is grounding out someplace. Where, I have no clue.

Trace and replace... or repair. (Trace and replace just sounded better) :D

SweetWaterSurprise 12-21-2011 05:42 PM

Thanks. I know the fuses, stalk, and relay are good, they are all new. Its just a ground out someplace from that wire. I still need to check some other wires mentioned in this thread. I appreciate the help.

timmy2 12-21-2011 08:51 PM

LIVEVIL, What year is your car? Do you have the schematic wiring diagram?
The only green wire with yellow trace on my '78 to '83 diagram runs from fuse 6 bottom to the low beams.

Porsche Head 12-21-2011 10:27 PM

I had a similar issue when I got my car back from paint.

It was the way the bulbs were seating or the incorrect bulbs. Once sorted out there were actually no wiring issues.

As always not sure if that is your issue but hope it sheds some light :)

Three2 12-22-2011 10:48 AM

Similar Issue
 
Same twist - with turn signals not working but emergency working however I noticed that with the vehicle turned off that I can get a solid turn signal (ie no flash/blinking).

I was wondering if that points more towards the turn signal switch being bad?

arbita1 12-22-2011 11:18 AM

Quote:

Originally Posted by Three2 (Post 6448892)
Same twist - with turn signals not working but emergency working however I noticed that with the vehicle turned off that I can get a solid turn signal (ie no flash/blinking).

I was wondering if that points more towards the turn signal switch being bad?

That's actually the parking light feature, and it works off a separate system. Maybe start a new post (not to hijack this one) and you can get some troubleshooting ideas.

Here are some quick ideas in the meantime:

1. Is Fuse No. 11 good? (I'm assuming you have an SC). A quick check is to see if your back up lights work as well.
2. If yes, is there power at connector no. 49 of the Turn Signal Relay socket?
3. If yes, then chances are the relay is bad and is the problem.

SweetWaterSurprise 12-23-2011 07:11 AM

My car is a 82. I am going to take out all my bulbs, check those connecttions and see if I am still blowing the fuse.

EmergencyLight 05-04-2012 02:47 PM

I've been having the exact same problem for a while now. I looked around for emergency lights but could only find stuff like this emergencylights.net

Can someone please help me find the right type of emergency light replacement?!


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