[Mgs] No Turn Signals

h.duinhoven at planet.nl h.duinhoven at planet.nl
Wed Apr 20 10:48:30 MDT 2022

The hazard switch in my 1971 BGT has been causing this issue from time to time.

Flipping this hazard switch several times helped to cure this till now. 




71 BGT


Van: Mgs <mgs-bounces at autox.team.net> Namens Michael MacLean
Verzonden: Monday, 18 April 2022 02:31
Aan: Robert's New iPad <mgbobh at gmail.com>; mgs at autox.team.net
Onderwerp: Re: [Mgs] No Turn Signals


I very much appreciate the help from the list with my turn signal problem.  This is to let you know, I think I know what the problem is.  After looking at the wiring diagram in Rick Astley's book (MGB Electrical Systems) I noticed the turn signals are wired through the hazard switch.  Just before the turn signals quit I was showing a friend the dash.  I was showing him what switches worked and which didn't.   One of the switches that has never worked was the hazard switch.  I clicked it back and forth to show him.  Right after that the turn signals quit.  Until I looked at the wiring diagram I did not put it together.  I just went out to the car to see if I rocked the switch back and forth maybe the turn signals would start working.  Instead the switch broke internally and refused to move.   It lasted 52 years.  No complaints.  I have ordered a new switch from Moss.  We'll see if that fixes it.  I might even get hazard flashers out of it too.

Mike MacLean


On Sun, Apr 17, 2022, 4:32 AM Robert's New iPad <mgbobh at gmail.com <mailto:mgbobh at gmail.com> > wrote:

        A dog saboteur, perhaps? 
        I would start at the basics, cleaning bulb contacts and ensuring that power is getting to each filament.   Check that the earth wires, if present, are earthing.
        Then review the connections of wires to the fuses, and test each fuse is good by measuring power through it.  It’s possible to seem OK with ohmmeter yet have insufficient current to light the lights.  

> On Apr 16, 2022, at 10:23 PM, Michael MacLean <springer.mike51 at gmail.com <mailto:springer.mike51 at gmail.com> > wrote:
> Last week the turn signals in the 69 MGB GT just stopped working.  I have replaced the flasher unit.  I know it is getting power because it audibly makes a clicking sound when I flip the turn signal stalk.  I checked the fuses, both are good.  I checked the incandescent bulbs in the front and they were OK.  The rear turn signals are LED and quite new.  I'm kind of at a loss here.  They were working when I stopped the car at the dog park and the just weren't working when I started the car back up.  Anything else I can check here?
> Mike MacLean
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