Main dipped headlights not working

67Dart273 said
OK let's step back, referring to your own hand drawn diagram. It seems to me we have a basic power problem that is affecting the ENTIRE interior of the car.

Thanks for your reply again! Yes I agree

This is based low? readings at the headlight / dimmer switch which is "most directly" supplied.

It appears so, even at the battery, in the boot. with a ground earth and on the 12v + on the battery I get only 5v reading. Take the battery off of the car and it is showing 12v. There must be a ground out live somewhere?

Also, your 4X / hazard flashers are supplied off the "hot" buss in the fuse panel, and that wire is also pretty "directly" fed.

Yes, on the first splice I can see where they feed from. The splice looked fine

So you need to backtrack from there
What have you changed? from original in the power path to the light switch / ignition switch?

I have changed the fuse box (video of this soon but it compares the same as to the one I removed)

Did you eliminate the bulkhead connector terminals for the "big" red? If not I would start there and at the fuse link.

Yes, this connector has been changed months back, all working fine for a good while (though no headlights, my wipers and indicators were working if a little erratic at times). Video of this connection also soon.

REMEMBER you cannot check this stuff WITHOUT A LOAD. So you need the lights on, etc, to load down that circuit.

Thanks.

How did you bypass the ammeter? Check that connection!!! Between the old "big red" and the "big black" at the ammeter (originally)

Took the connections off the back, soldered them together. Red to Black.

If / when you start to get this straightened out, and since you have a new fuse panel, I would try and add some things to "fused." Wipers for example.

Yeah.

If / when you find the trouble at the headlight switch, and if the ignition switch is still low, "it's simple." You need a load on the switch, heater, ignition, signals, something. With that load, check the switch "coming in" and "going out" Should be obvious if the switch is at fault.

Are there any in line fused links I should try and find to see if they have burnt out?

Thanks again