Hi, I hope you folks can help me out... I've made a new dash whilst getting my Herald 13/60 based Moss up & running, the car had loads of wiring "issues"!
I have main beam (inc. flash) switch using "purple-fuse-brown" live wire from solenoid & original blue/white to headlights (switch relay used). Side lights switch using original brown/red as live & original wiring to sidelights (switch relay used). Dip beam also using original brown/red as live, & new wiring to headlights (switch relay used).
Each headlight has new, separate earth points.
Main beam warning light on dash wired from output side of main beam switch to a good earth. BUT... For some reason I simply can not fathom, the main beam warning light also comes on when I switch the dip beam on...even though the two are not connected!
Wire it to the input side of the full beam. As per OE installation.
The dip light is probably running it through the common earth of the light unit.
Surrey AO and Triumph Hoover, Location: Guildford - Surrey, Spitfire 2.5PI - 1967 having surgery, PI Saloon- 1969 RBRR x 3, PI Estate - 1969 (to restore), Stag - 1971 RBRR x 2, PI Saloon MkII - 1971(stalled project), Sold some cars!
Worcestershire Area Organiser search Facebook for Club Triumph Worcester Triumph 13/60 1970 Convertible first car restoration, many botches much learnt... Now back MOTd and Taxed... 2016 RBRR COMPLETE 1974 Spitfire Mk IV in Yellow and Rust... for restoration Triumph 1000cc 1991 Daytona got to go to pay for Yellow Peril
A couple of points come to mind: - I don't see any mechanism to prevent both dip and main being on together - Why is there a relay on the dip but not on the main? - the main beam switch is drawn with dash light on one side and the blue/white on the other. Are these separate terminals?
Pay particular attention to the first of those points. I once had a Dolomite Sprint which some PO had re-wired to allow dip and main to be on together. The result was that the SHARED earth wire melted and burned out INSIDE THE BULB. This, in itself, would explain your symptoms.
Current fleet 1967 Vitesse 2L conv "Tessa" 1970 Spitfire Mk3 (project) "Toby" 1972 GT6 Mk3 Not enough time or space
Recently sold: 1972 2.5 PI estate "Harry" (gone to russell on here) 1973 Toledo 2-door "Spike" (gone to a club official)
Hi gents, Thanks for the input..ref Rob's points: Dip beam does indeed now stay on when main beam is switched on...I did not realise this would be a problem! No relay on main beam as there was a fuse in the OE wiring (& I am a numpty!) The blue/white jumps across the two terminals of the main beam "flash/off/on" toggle switch.
When I looked at the original column switch I couldn't see that the dip necessarily went off when main beam was switched on. My error obviously, I wonder if there is a dashboard switch that would do the job? Andy.
Hmm, interesting find in the MOT manual...chapter 1.7 Headlamps, Method Of Inspection part 4C..."on vehicles first used on or after 1 April 1986, the "tell-tale" illuminates when main beam is selected"...having a 1969 plate then my easiest option is to ditch the dash main beam tell-tale light! I will rewire the switches so the dip goes off when the main beam is switched on to save possible overload. Cheers.