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MG MGB Technical - indicators not working

hello , my indicators have stopped working , there is no live feed to the flaher unit, is there any earths around that area. my car is a later model 79 thanks
daz

Daz,

Do your four-way flashers work? Have you tried exercising the four-way flasher switch rigorously? So often, turn signal failures are linked to a fault in the four-way flasher switch.

For us Americans, by the way, how sweet it is, after listening week-after-week to presidential-campaign references to "Joe the Plumber" to address "daztheplumber" instead.

' Hope this helps...

Allen
Allen Bachelder

The power for the flasher unit comes from an inline fuse via the hazard warning switch. Should be easy to trace back. Barrie E
Barrie Egerton

hi , just turned the hazards off now its working, i dont have a flasher unit as ive not got round to getting one .i just want to mention i just purchased some american stuff called lucas stabilizer, have you heard of it? .i added to the oil and the engine sounds sweet, go know whats in it !
daz

Daz.. There are six connectors on the back of the hazard switch. They are grouped with four and two pins. The two pins on the bottom are the ones that when the hazard switch is in the off position they give continuity to those two green wires. They are the ones that power your direction lights.
Sandy
conrad sanders

The power for the indicators/turn flasher does *not* come from an inline fuse, that fuse feeds the hazard flasher unit. The indicators are fed from the green-circuit fuse i.e. the 2nd one up in the fusebox. There are no earths in that area for either the indicators or the hazards either.

As Allen has said flipping the hazard switch back and fore is the first step in non-working indicators, as the feed to the indicator flasher goes via this switch in the off position. This is to disconnect the indicators when the hazards are on, as otherwise there is a chance of power from the hazard circuit getting back onto the ignition to power the coil and the fuel pump, even if the ignition key is in your pocket. Obviously this is, well, a safety hazard.

But in this case it seems like the hazard switch had inadvertantly been left on.
Paul Hunt

"That fuse" ? There are 3 inline fuses on a '79 car. One for the hazard lights, one for the radiator fans & the other feeds the heater fan, the turn indicators, & the heated rear screen on a GT. It's power comes from the ignition switch. There may be other ccts involved as well. I quit looking, too many parallel lines.Barrie E
Barrie Egerton

I stand corrected, Barrie. That for the hazard flasher has brown wires both sides and is live all the time, the other two have brown one side and green the other, one powered from the ignition relay and one from the ignition switch. I should have remembered - when I rewired a car of that vintage and powered it up for the first time I got some really strange effects, until I realised the harness had come with the two ignition fuses cross-connected i.e. brown to brown and green to green!
Paul Hunt

This thread was discussed between 14/11/2008 and 16/11/2008

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