[unclereedy]

Help please. On my "73 GTV the dashlights, taillights, brakelights and one headlight went out simultaneously. Turn signals still work.

 

[grapppa]

do you have a wiring diagram?

 

[unclereedy]

do you have a wiring diagram?

I have a wiring diagram generously supplied on this forum but components are not all identifiable.

 

[alfaparticle]

The first thing to do is check the fuses. If they are the aluminum strip type then replace them with new copper type. You may have to clean the contacts in the fuse box.
If that does not fix it then buy a voltmeter and check power to the relevant fuses when the light switch is turned on.

 

[archeologist]

Headlights each have a separate fuse.

But they all have a common feed on the back of the fuse box.

Check your grounds, or the switch.

 

[unclereedy]

Headlights each have a separate fuse.

But they all have a common feed on the back of the fuse box.

Check your grounds, or the switch.

Thanks everyone! Turns out it was corrosion in the 48 year old fusebox. I sprayed it with electronics cleaner and voila! everything came back on at the same time, brighter than before.

 

[Alfaboutvegas]

hmmm, imagine that, corrosion on old Italian wiring. Who would have thought?