1972 S3 headlight issue

[ASHMADDOX]

Hi All ...

trying to do some cost effective repairs on my V12 for once ! i.e myself doing it !

headlight issue ...if anyone can suggest what to try next or even perhaps some wire colour codings to check !

so issue ....

I have side lights but no head lights from the central dashboard switches and cannot turn on full beam either

i can though flash full beam from the steering column stalk/control....

does anyone have any thoughts that could save me ?


I have so far tracked the power through the fuse box ( all goo ) and out to the rear of the main sidelight and main lights switches - current is also flowing out of the switches ....... so i am guessing / assuming / hoping that the issue is somewhere from their to the front bonnet ... i have not checked both bulbs each side for main as thought probability of both dip filaments and not both full beam was less than anything else ......

is there a relay perhaps between the dash switches and the front headlights that could have blown/broken? wouldn't that affect all lights though not just the dip beam issue i am having ?!?

any help on checks i can do or idea gladly received as i have hit a bit of a brick wall on my diagnosis !!


thanks in advance

" home-help electrician"


P.S its originally a US car if that makes any difference for diagnosis ?

[Heuer]

No relays involved but two fuses which you say you have checked (both?). First thing to do is disconnect the big plug connecting the loom to the bonnet and using a test meter or lamp to check you are getting voltage on the various pins - specifically 2 and 3 for high and low beam respectively:

[ASHMADDOX]

I thought i had checked all - but will check again for sure


thankyou

[ASHMADDOX]

thankyou for the notes re which pins on the bonnet connector as wasnt sure ...