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Guest Message by DevFuse
 

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Flasher relay making a constant buzzing and no flashing.


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10 replies to this topic

#1 OFFLINE   Tickman

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Posted 19 June 2017 - 01:26 PM

On my Triumph Toledo I fitted an electronic flasher relay and all has been well until Saturday when it did nothing.
I checked the connections and the best I could get was a constant buzzing when I indicated.
So I bought a replacement and swapped it over only to find exactly the same behaviour.
I haven't touched anything in between times, I tried a separate earth to the relay and the same.
Any pointers as to what has decided to die?
I am going to check the indicator stalk connections next.

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#2 OFFLINE   Bobthebeard

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Posted 19 June 2017 - 01:44 PM

A short circuit somewhere in the wiring?
Nervously prodding at rust since 1978

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#3 OFFLINE   Junkman

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Posted 19 June 2017 - 01:55 PM

Tickman in non ticking flasher shocker.

 

The electronic ones need a certain minimum voltage to work, otherwise they just buzz.

Old cars often do not create this voltage, hence electronic flashers shouldn't be used in them.


1967 Renault 16 TL..................................................with many a pedal

1970 Rover P6 V8........................................................white in colour
1971 Mercedes 280SE............................................................fucked
1979 Mobylette AV89............................................................running

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#4 OFFLINE   Tickman

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Posted 19 June 2017 - 02:07 PM

A short circuit somewhere in the wiring?

Looking for something like that but found nothing so far.

 

Tickman in non ticking flasher shocker.

 

The electronic ones need a certain minimum voltage to work, otherwise they just buzz.

Old cars often do not create this voltage, hence electronic flashers shouldn't be used in them.

Alternator putting out 14.2V same as it has for the last 6 months while working perfectly.

It was fitted due to the reliable old one being fucked and risking everyone with epilepsy having an fit if they caught a glimpse.


1968 Morris Minor 1000

1957 Morris Minor 1000

1968 Land Rover 

1985 Reliant Scimitar SS1

1998 Volvo 940

1972 Triumph Toledo

1986 Talbot Express Camper


#5 OFFLINE   Junkman

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Posted 19 June 2017 - 02:09 PM

14.2V is more than enough.

Fault is elsewhere.

Just for the fun of it, try another relay. They can fail.


1967 Renault 16 TL..................................................with many a pedal

1970 Rover P6 V8........................................................white in colour
1971 Mercedes 280SE............................................................fucked
1979 Mobylette AV89............................................................running

1985 Ford Granada 2.8 Ghia X......................................The Beast Estate
1991 Jaguar 4.0 Sovereign.........................with fresh MoT and fucked wings
1997 Peugeot 405 2.0 Executive Estate...................................almost mint


#6 OFFLINE   Tickman

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Posted 19 June 2017 - 02:24 PM

14.2V is more than enough.

Fault is elsewhere.

Just for the fun of it, try another relay. They can fail.

I bought one this morning and it did exactly the same as the currently fitted one. 

I know a new one could fail but the odds of exactly the same fault seem unlikely but not an impossibility.

 

I will have a plod through what I might have disturbed at MOT fixing time but nothing electrical was done, the welding carried out was nowhere near any wires and the steering stuff was again nowhere near electrics. All this added to the fact they were working at the end of last week leaves me stumped!


1968 Morris Minor 1000

1957 Morris Minor 1000

1968 Land Rover 

1985 Reliant Scimitar SS1

1998 Volvo 940

1972 Triumph Toledo

1986 Talbot Express Camper


#7 OFFLINE   JayW

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Posted 19 June 2017 - 03:30 PM

Most likely a poor earth. I've experienced the same thing.
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#8 OFFLINE   AMC Rebel

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Posted 19 June 2017 - 09:03 PM

You could try bridging the connections temporarily - to see if the indicators are actually working - if there is a short or bad earth you'll either blow a fuse or see the bad earth.


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#9 OFFLINE   doobietoo

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Posted 19 June 2017 - 09:51 PM

Check that a wasp has not got into the unit...


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#10 OFFLINE   AMC Rebel

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Posted 20 June 2017 - 09:26 AM

Check that a wasp has not got into the unit...


When my electric gates packed up it was because a slug had crawled into the control box and shorted out the circuit board

1994 Range Rover Classic "The Crying Pumpkin"

2000 Ford Mondeo Verona 1.8 pez 

2000 Ford Puma 1.7 - Roffled and now with new AS owner

1968 AMC Rebel SST convertible (working and road legal but in limp home mode)

1967 AMC Rebel SST convertible (superior body and originality being slowly raided for spares for the '68) Off road for at least the last 25 years

1956 Chevy 210 4 door hardtop - bought in 2000 and still in my garage - I even do a bit of work on it occasionally - long term project

2005 MG ZT-T awaiting completion of engine transplant of spare V6 after OMG HGF on the engine that "never has that problem"

2005 Land Rover Discovery - for long trips and moving engines 


#11 OFFLINE   John F

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Posted 20 June 2017 - 10:17 AM

Most likely a poor earth. I've experienced the same thing.

 

That was my first thought, but Tickman said he'd tried bridging the earth.


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