Phil Brooks Posted February 24, 2014 Share Posted February 24, 2014 Hi, Newboy here. I am currenlty rebuilding my Herald 13/60 convertible, i have got to the bit where i wire up the clocks. ALthough i kept the wires together for the two dials, I forgot to mark the cables that were for the Fuel tank and the temprature!!!! Lesson learnt there. Does anybody have an image for the correct wiring set up, or know what they should be (the wiring diagram is maing me see spots in front of my eyes!!)I have two sets of wires, One set is a simple two wires, both green! The other set is also green, bit it has a single wire and then a double wire leading to one spade. I dont know which is whice, and other than stripping the wiring, i was wondering if anyone had an image or indication. Many thanks Phil Quote Link to comment Share on other sites More sharing options...
Matt306 Posted February 24, 2014 Share Posted February 24, 2014 Think those go to the voltage regulator the little box screwed to the rear of the speedo. Give it a shake though first its probably bust, mine was used a modern solid state chip in the case to get a nice modern steady 10v outpu replacement. Quote Link to comment Share on other sites More sharing options...
Phil Brooks Posted February 24, 2014 Author Share Posted February 24, 2014 2487 wrote:Think those go to the voltage regulator the little box screwed to the rear of the speedo. Give it a shake though first its probably bust, mine was used a modern solid state chip in the case to get a nice modern steady 10v outpu replacement.Thanks for this info. I am still unsure on the wires for the Fuel guage and for the Temp guage. As i have stripped, Sprayed and rebuilt this car, i think that the extra few hours to take the tape of the wiring and trace the wiring back, (as well as check that the Voltage regulator is fine) will be a good idea, I dont think it has been done since the car was built, So this will give me piece of mind and means i wont need to worry about the wiring later! What do you think? Quote Link to comment Share on other sites More sharing options...
Matt306 Posted February 25, 2014 Share Posted February 25, 2014 The voltage regulator for the dials is a small oblong box. Originally it would work by have 12v in and then a small metal strip would heat up and break the contact down to 0v as the contact cooled it would spring back and 12v would be input again. This happened very quickly and the result was around 10v output for the temp and fuel gauge. This was great in the 1960s but was hampered by the alternator as it wouldn't always supply 12v. This would lead to a gauge reading high or low.Google for 10v voltage regulator and put smiths in as well, i found a guide to make one, you can but a modern equivalent for around £10.Get a Haynes manual the wiring guide is in there with colours as well, its a doddle to follow.Electrical upgrades to consider; Fuse box (MUST!) Alternator (No Dim lights) , Electronic ignition (Better fuel Economy), Electric Fan (better fuel economy, engine doesnt waste HP) Relays for Lights (Even brighter lights, less current through switch gear) Quote Link to comment Share on other sites More sharing options...
Matt306 Posted March 6, 2014 Share Posted March 6, 2014 this was the guide i used http://www.thelotusforums.com/forums/topic/23486-solid-state-voltage-regulator/ Quote Link to comment Share on other sites More sharing options...
junkuser Posted March 6, 2014 Share Posted March 6, 2014 http://www.britishv8.org/articles/mgb-voltage-stabilizer.htmAnother approach to the same job for evaluation.It draws attention to the tab being used as the ground connection. Quote Link to comment Share on other sites More sharing options...
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