1971 911T turn signals

Denham · 09-07-2020, 12:13 PM

Turn signals don't work (either left or right) but 4-way flasher works fine. Could it still be the flasher relay? Or do I need to take the steering wheel assembly off to check the contacts. Fuses are all ok. Thanks

timmy2 · timmy2's Garage

Check the 6 pin plug for the turn signals wiring under the dash is tight.

JSV798 · JSV798's Garage

When this happened on my 1978SC it was the fuse (#11 I think); the fuse was intact but the ends were corroded.

Trackrash · Trackrash's Garage

Quote:

Originally Posted by JSV798

When this happened on my 1978SC it was the fuse (#11 I think); the fuse was intact but the ends were corroded.

BTDT. The ends will burn on the fuses. Use a volt meter to check for continuity.

JSV798 · JSV798's Garage

It's also worth noting that on my 1978SC the hazard switch is powered through fuse #17 which is always hot which means the hazard lights will work with the ignition off. Fuse #11 is hot only when ignition is on. And on my car the brake lights are also fused through #11 and they weren't working either which was a big clue that the fuse was corroded. Strangely both Haynes and Bentley say brake lights fused through #15, but I go by what it says on the fuse cover. Check your fuse cover to see what the fuses do.

Denham · 09-08-2020, 01:36 PM

Thanks for the help. When it was pointed out that the flasher works without the ignition being on, that really pointed me back to the fuses. I had checked them all (easy to do as they are the old open type), but now I took the fuse out for the blinker. While the fuse element was intact, the end had broken off. See picture. Replaced it and now all good.

Denham

JSV798 · JSV798's Garage

Glad you found the problem. I had the same problem but it was only when I noticed that the brake lights weren't working either that I found the fuse to be corroded. I had a lot of wiring from past alarms etc under the dash and took the opportunity to tidy all that up to the other side of the bulkhead. Quite a big job but so much better and was able to throw away various obsolete components that previously I didn't dare touch in case the alarm and central locking stopped working. It was only once I had cleared all the old wiring that I could get at the hazard switch. The indicators failed while I was out in the car and had to drive back giving hand signals and would have been even more concerned had I realised that the brake lights weren't working either!