Guidance on turn signal relay buzz please
 

On my 1986 Porsche 911 I am getting a relay buzz only with the passenger side turn signal. All parking lights work and so do the hazard lights, however the hazard light icon on the dash ( flashing left and right arrows) only flashes with the left arrow. When I turn the right passenger turn signal on I get a relay buzz and a solid right arrow on the dash. I read this might be a ground issue? Can someone break this down dummy style for me? I have the front bumper off and the rear tail light out is there anything I should test?. Thanks in advance.

Could it just be a burned out filament on either the front of rear signal lamp?

Everything appears to be working. I swapped the front bulbs around and it didn't change . Maybe I should try the back too and see what happens. My old parking lamp housing was toast so I had to take the bumper off to change it anyway.... If it's just a bulb I'd be so happy.

I even pulled the steering wheel and changed the turn signal/ high low beam switch.

Rear lighting housing fully installed and grounded?
Check the rear bulb as well.

From what I can tell all bulbs appear to be working properly. First thing tomorrow I will swap all the left rear bulbs to the right. I unbolted the rear ground and cleaned it with sandpaper then reinstalled with no luck . It's frustrating!

When my '86 targa developed a similar buzz, replacing the turnsignal/high low switch with a new one solved my problem conclusively -- turn signal contacts were arching.

I assume you already tried a new relay.

I got a new relay from Porsche here in Atlanta and it did not change anything. Also my switch was ordered from pelican, so I assume it's good to go..... Running out of ideas other than finding a mechanic that specializes in electrical....

Also I switched bulbs from drivers side to passenger with no successs

Is it possible to get a bad relay that is new? I'll see if I can find a way to test it; I assume I can check the ohms somehow?

Yes. new relays fail all the time. Just ask any industrial electrician...
You will need to energize the coil to test the flasher circuit and contacts.

I just ordered another one to make sure. I'll test the other one just out of curiosity, however it's spring and I want to drive! No Time for delays.

Well, if it is so urgent to drive and nice out, roll down the window and use hand signals. :)

Haha I've been doing that, but the maniacs here will either hit my car or take my arm off.

Well I replaced the front turn signal and parking lamp on the passenger side, I swapped all the bulbs in the rear light housing, I cleaned the rear ground wires, and I changed the relay. Still buzzing. I'm going to just take it into a shop. I'm sure at this point it's something simple, but will take some time to find the bad ground. I'll post what the results are in a couple of weeks when I have the time to get it to a shop.

Just out of curiosity, does the buzzing occur and the right tach light not flash with the hazard switch turned on?

I have an 86 and I'm very familiar with how this circuit works. It should be easy to troubleshoot. Maybe I can help.

The flasher will buzz if it's not loaded with enough lamps. Your flasher is fine if it works for the left side and the hazards. Your problem is the right side exterior blinkers are not properly connected to the flasher when you actuate the right turn signal.
When your hazards are on, do all the exterior lamps flash?
It's not a grounding issue at the lamp housings since the parking lamps use the same ground.

I have exact same thing.When I removed the alarm system,and immobilizer, the central locking would only work if I reinstalled part of the alarm.Now no right turn indicators at all, only a loud buzz from relay, which has been replaced. I must admit to literally cutting out the whole system, and have managed to cheat the central locking ,but the indicators!!!!??

pjturner5,
your hazards and left blinkers work correctly?

Buzzing only occurs when the right side turn signal is on. Hazard lights work, but only the left side dash light is lit on upon the flash.

Sorry for the delay I'm currently out of the country till Monday. When I get in I will check the lamps, but I believe the parking lights all lit when opt he parking lamps were on. I'm almost sure they all flashed with the hazard switch was on, but can't be certain till I check.

Assuming they are all working does that mean the new switch I installed is bad too? Or could it be the on/ off switch for the headlights? I noticed when I replaced the turn signal / high beam switch it connected through the light switch.

Sorry for typos.....iPad....and thanks for the help!

I should be back in as early as today (Sunday). I've spoken with another member here on the pelican forums who said he'd look at it for me this week in Atlanta. In the meantime, once I arrive, is there any info I can provide to help determine the cause of this issue?

My truck is getting painted and won't be done now till mid week so if I haven't figured it out by Wednesday I'll trailer it to the pelican member for troubleshooting. Either that or I'll put it all back together and drive it using hand signals haha

still need to verify if all lamps are flashing with the hazard switch.

Should have that info by this evening. Thanks

Okay so all four turn signals flash with hazard on, but the drivers side marker light does not. It does however light up when I have parking lights on.

I had a similar, but not exactly the same, problem. Even though the ground connections seemed good, the problem went away only after I ran a new ground wire on the side that wasn't working correctly. There probably was a break in the original ground wire.

When you say "marker light" which one are you referring to? Under what condition does it not light up?

Based on your symptoms I believe your turn signal problem is an open circuit as shown on this diagram. Maybe a bad connection at the connector marked "4" . This is one of those round 6 pin connectors under the dash.


http://forums.pelicanparts.com/uploa...1459801242.jpg

When I was referring to side marker light, it is the one with the small bulb closest to the rear of the car. It comes on as a parking light in every scenario, but not as a hazard.

This onehttp://forums.pelicanparts.com/uploa...1459814569.jpg

I'm going to go ahead and install the new light housings I have and then investigate connections under the dash. I plan on dropping it with a pelican member this week to look over if this doesn't fix it. I'm kind of terrible at wire diagrams, do you by any chance have a photo reference to the location if this connector?thanks

I'm assuming it's the one from the turn signal switch?

Since my old ones had a bit of corrosion I decided to go ahead and replace the complete light housingshttp://forums.pelicanparts.com/uploa...1459815333.jpg

Parking/marker lights are a completely separate circuit.
The hazard/turn signals are the same filaments. If the hazards are working, then you turn signal problems is not the bulbs/housings.
I'll try to take a picture of the suspect connector.

A picture would be great. Thank you

Fixed! I dropped it off at my buddy's shop and he had it fixed in no time. It was the wire coming off the back of the hazard light switch. He said it was worn from being bent over time and only had two tiny strands of copper wire holding it together. Wiring is something I'm going to invest some time in to learn I think if I plan on keeping my 911 which I absolutely do.

:Dhttp://forums.pelicanparts.com/uploa...1460320790.jpg

Just read you're thread and wondered if I should check the rear of my hazard switch.
I fitted a new turn signal switch a couple of years ago and everything was ok for a while.
Then when I signalled right or left I would get nothing. If I then switched my hazard switch on then off my turn signals would start to work. But sometimes when I depress the hazard switch the hazards don't even work, I think I have a poor connection in there.

Turn signal.
 

You may have an open circuit at the fuse panel.

Ask me how I know....................

Gerry

pm sent.