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Indicators not flashing
Recently, on my 78 SC, the indicators stopped working when I used the indicator switch on the steering column BUT if I activated the hazard warning lights then everything worked normally (almost) in that the red light in the switch and all 4 indicator lights flashed. However I did notice that the green arrows in the tachometer didn't flash which is a clue. I have studied the wiring diagram to try and work out how this can happen and have concluded that in the Haynes manual (page 298) there are some cable connectors labelled T4 and T6 that connect both the turn signal switch and the hazard circuit to the turn signal indicator lights (green lights). The question is where are these cable connectors T4 and T6 so that I can check them out?
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1959 Bristol 406 (bought in 1972; sold in 1977) 1966 Porsche 2.0 coupe (bought in 1977; sold 1981) 1978 Porsche SC coupe (bought in 1993) |
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Join Date: Nov 2007
Location: New Jersey
Posts: 3,112
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More than likely it is your relay. It sits behind the oil level gauge. It’s easier to get to through the front bonnet. Pull it out and clean it, it if doesn’t work then it’s time for a new one. I just went through this.
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Rey....77 930 "the Mistress" |
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I had a problem a few months ago with the relay flashing too fast and replaced it, so all was well for a while. When the new problem started I thought it might be the relay so I put the old relay back and it had the same effect except that it flashed too fast so don't think it can be the relay.
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1959 Bristol 406 (bought in 1972; sold in 1977) 1966 Porsche 2.0 coupe (bought in 1977; sold 1981) 1978 Porsche SC coupe (bought in 1993) |
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Be aware that not any 4 prong flasher will work correctly in a 911.
I bought several from a local auto parts store (even ordered one) and none worked correctly on my 1979SC. Some would work but both indicator lights would flash when turning left or right. I bought one from Pelican on June 13 2012 (914-618-303-11-M44) and all has been well since. Apparently the part # has been superseded to the one at the top of this page. https://www.pelicanparts.com/cgi-bin/ksearch/pel_search_2016.cgi?command=DWsearch&LastVisited_input=0792&Previous_Section=ELLITE&make=POR&description=1H0-953-227-OEM
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Pete 79 911SC RoW "Tornadoes come out of frikkin nowhere. One minute everything is all sunshine and puppies the next thing you know you've got flying cows".- Stomachmonkey |
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Finally fixed this problem: it was the flasher relay fuse. It wasn't blown but was making a poor connection in its holder. A new fuse fixed it. Hope this helps others with the same problem.
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1959 Bristol 406 (bought in 1972; sold in 1977) 1966 Porsche 2.0 coupe (bought in 1977; sold 1981) 1978 Porsche SC coupe (bought in 1993) |
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