Richard B Posted March 25 Share Posted March 25 Does anyone have any pictures of an early Hearld Front indicator unit please? I think it works by one wire to the bulb coming from the sidelight feed and one wire coming from the indicator feed. I am just a bit confused how the bulb does not earth through the casing to the bonnet. Jessica has these on her Coupe, and wants them wired up 🙃 Quote Link to comment Share on other sites More sharing options...
Wendy Dawes Posted March 25 Share Posted March 25 Quote Link to comment Share on other sites More sharing options...
Wendy Dawes Posted March 25 Share Posted March 25 Quote Link to comment Share on other sites More sharing options...
Richard B Posted March 25 Author Share Posted March 25 Thanks Wendy, that explains it. Its a double pole bulb! No earthing through the case. 1 Quote Link to comment Share on other sites More sharing options...
glang Posted March 25 Share Posted March 25 Wait a minute Richard surely both the filaments of the bulb, one supplied by the side light feed and the other from indicators, must earth down through the case... Quote Link to comment Share on other sites More sharing options...
RobPearce Posted March 26 Share Posted March 26 I think earth together with strap. Quote Link to comment Share on other sites More sharing options...
glang Posted March 26 Share Posted March 26 oh I see, both filaments earth through the case of the lamp which then has a strap to earth it? Probably better than using its fixing screws to the bonnet as they always rust.... Quote Link to comment Share on other sites More sharing options...
Richard B Posted March 26 Author Share Posted March 26 I might be wrong, but I think the early Herald indicator is different to the others. My understanding is that that if the sidelights are on; when you indicate the sidelight flashes on or off. This is because both sides of the bulb get 12v, same as an ignition warning light. I believe the bulb has two poles on the base, but only one filament. Earthing through the bonnet and then the hinges is problematical. If either function is used on its own, then the bulb earths through the other bulbs. Anyone got a working 948 who can confirm? Quote Link to comment Share on other sites More sharing options...
Wendy Dawes Posted March 26 Share Posted March 26 Yes that’s correct I’ve had 2 early heralds, Mabel being the most recent but she’s had halogen upgrade with a pilot sidelight so her original side/indicators are now just indicators and have an orange lens in place of the original white ones , Quote Link to comment Share on other sites More sharing options...
glang Posted March 26 Share Posted March 26 2 hours ago, Richard B said: I might be wrong, but I think the early Herald indicator is different to the others. My understanding is that that if the sidelights are on; when you indicate the sidelight flashes on or off. This is because both sides of the bulb get 12v, same as an ignition warning light. I believe the bulb has two poles on the base, but only one filament. Earthing through the bonnet and then the hinges is problematical. If either function is used on its own, then the bulb earths through the other bulbs. Anyone got a working 948 who can confirm? That would be pretty difficult to do and Rimmers says a double filament bulb (GLB380) was used. That makes sense as the 5w filament would illuminate with the side lights and then the much brighter 21w light up as well and flash when the indicators are operated. Both are earthed through the lamp case and this arrangement would then be much easier to convert as Wendy has done... Quote Link to comment Share on other sites More sharing options...
glang Posted April 7 Share Posted April 7 How did this work out Richard, all functioning ok? Quote Link to comment Share on other sites More sharing options...
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