Brake warning light, The quest for success continues Options

[PaIsa]

So I am back trying to get my brake warning light to work properly. The situation before I started searching for the solution was the following:

Brake warning light was always blinking whatever the car condition. Blinked with the ignition ON. Blinked with the engine running and hand brake applied (normal). Blinked with the engine running and hand brake removed. Blinked with the engine running, hand brake removed and MC wire disconnected. So basically, blinking all the time!

So I was investigating the emergency (hand) brake wiring. Remove the seats, center console, etc. Looked at the emergency brake switch and seemed to work OK. There was a contact (closed circuit) when the switch was in position where the emergency brake would be applied and no contact (open circuit) when the hand brake would be removed. Looked on the wiring for evidence of short to ground but was not able to find anything. The wire goes in the center tunnel and is accesible until the shifter where rather then following the main wiring harness and the speedo cable, it goes under and God knows where it goes!! So I was not able to follow it all the way.

Now I have some disconnected wires near the brake fluid reservoir (already a thread on this trying to understand where these should go). The wires are brown-white and brown-white connected with a brown wire. The brown-white wire that is connected with the brown wire is cut.

So after I reassemble the emergency brake wiring, I did some test again.

Ignition ON, the brake light comes ON. Whit the engine running, no more brake light blinking.

So now I tried with the cut wire (the one near the brake fluid reservoir) reconnected. Brake light blinking all the time. Disconnect the wires, no more blinking when the engine is running.

I am lost. Even writing this I am not sure if I am right with the tests I did and the results I got.

Anyone has any advice? I looked at the wiring diagram, but not sure!!

I would like to have this working but don't want to go crazy with this!!

The car is a 1972.

[Superhawk996]

Your harness tape is not original nor is the way the wire is routed.

DAPO has been in there mucking around and very likely is the source of your very odd symptoms where the state of the warning light and the functionality of the parking brake switch seems to be dependent on whether or not the engine is running. Very unusual.

Out of curiosity, do all your turn signals function properly regardless of engine on/off?

[PaIsa]

Your harness tape is not original nor is the way the wire is routed.

DAPO has been in there mucking around and very likely is the source of your very odd symptoms where the state of the warning light and the functionality of the parking brake switch seems to be dependent on whether or not the engine is running. Very unusual.

Out of curiosity, do all your turn signals function properly regardless of engine on/off?

Status of turn signal operation:

No key in ignition: not working when selecting either left or right (I guess this is normal)
Ignition ON: turn lights work without a problem
Engine running: turn signal work without problem

I guess you are right about the wiring harness as I what seems to be the way in was done at the factory was with a kind of fabric tape and it was taped so that you were able to see the wire (not fully taped with shinny electrical tape like in my case!)