So I was messing around with my teener (imagine that). With head lights on Tach lights and speedo doesn't.
But if I leave just parking lights on Speedo lights and tach lights.

Some circuit is askew. So who is the wizard for this one? 70 914 with 71 splice job done long ago by who knows.

Oh and the brights will not click to on. Only turn on as long as I old the lever back.

First try cleaning the ground that is behind the fuse panel. Remove the screws that hold the fuse panel in place and you'll see the ground up above it.

Not a lot of trial and error here for me ( I need to get under the dash myself) but I understand that a poor, or non-existent, ground to a gauge can cause all sorts of dash light/gauge behavior. Check the grounds for the gauges. Apparently if a gauge is not mounted directly to body metal it will ground through another circuit.

-Jeff

Actually you guys are close. It is ground related. I seem to be removing the ground with actuation of the switch. So it is a wiring snafu. Time to get out the magnifying glass and trace out those wires in the diagram. then crawl up under the dash or pull gauges out front and chase em down. Not this week becuse I got to keep car off the stands and ready to Autocross this weekend.

Found it, Not sure how to fix it though. So the best wiring diagram I have (for a 71 model car) shows a white wire W/green stripe on terminal 57 of the head lite switch going to the speedometer lighting circuit.

Well my 70 speedometer doesn't have a terminal for this wire. Hmm.
So I go spelunking pull head light switch out and find white wire with green stripe is whee it should be. However it has in it's life time gotten hot and melted the insulation off. Probably a short somewhere. Couldn't find the other end as it was starting to drizzle and get dark.

Since this car seems to have a 71 wiring harness spliced in somehow this kinda shit drives me crazy.. How is the 70 speedo supposed to be lit. (illuminated).

Should figure this out soon as I would also like to light my gauges in the dash. CHT, Oil pressure, Oil Temp.

On a lighter note I got the cigarette lighter to work so I can now charge my cell phone

that's not a terminal, that's a bulb ...

that's the green low-beam indicator bulb ...
the bulb itself has 2 connectors, white/green for power, brown for ground.

Andy

Ahhh I bet if I fix that I may be one step closr to getting my high beams to work. They come on by puling the stalk to the rear. but do not get the relay to latch. Probably a bad relay too.