Troubleshooting my electrical issues., My first problem was blinking red light on the dash for brakes Options

[vin man]

Edit: Renamed the thread because what started out as one electrical problem has led to others and I'm hoping to capture all the information in this one thread.

Initial Problem:

When I turn on the 72, the red light on the dash (in the top part of the gauge on the left side of the dash) blinks and won't stop. I've made sure the e-brake is all the way off. I'm wondering where is the switch that controls this light?

I've read that when the brake master cylinder is replaced, there is a switch on the MC that needs to be reset. I used a MC from Rock Auto and there is not reset switch button. Only the electrical switch that activates the brake lights.

I have a brown wire that is connected to nothing in the area of the e-brake handle. I've tried grounding it but the light still blinks on the dash.

Any advice would be appreciated.


Click here for video of the blinking light: Blinking red light

(IMG:http://www.914world.com/bbs2/uploads_offsite/i304.photobucket.com-11380-1486858110.1.jpg)

Master cylinder:
(IMG:http://www.914world.com/bbs2/uploads_offsite/i304.photobucket.com-11380-1486858537.1.jpg)
(IMG:http://www.914world.com/bbs2/uploads_offsite/i304.photobucket.com-11380-1486858538.2.jpg)

[Dave_Darling]

URO... Not exactly the highest quality.

I believe that the original flasher relay has multiple contacts in it, one to run the external lights and one to run the indicator in the tach.

Different years may have used different flashers, though. I don't really remember.

--DD

[vin man]

URO... Not exactly the highest quality.

I believe that the original flasher relay has multiple contacts in it, one to run the external lights and one to run the indicator in the tach.

Different years may have used different flashers, though. I don't really remember.

--DD

I returned the URO POS.
No progress last night. I'm going to start looking for professional electrical person to tackle this. Either that or replace the whole harness.

Edit:
What I accomplished last night.
#1 - Realized the URO relay was junk. fell apart first time I installed it than pulled it out of the socket. Returned to Autozone.

#2. Put everything back the way it was including the old relay. When I turn key on, the orig relay would click superfast. blinkers did not work.

#3- tried the BAP (DNI brand) relay. Blue the fuse.

I'm really electrically challenged and super frustrated. I followed all wires and did not see any that were melted/fried. The fuse that blows is position 8 in my fuse block. When I look at the wiring diagram for a 72, the colors of the wires on both sides of position 8 in my car actually match what is show in postion 9 in the diagram. on 1 side, 2 black wires. On the other side, 1 black/yellow wire and 2 red with white wires. Not sure why they are in different position but I would suspect it doesn't matter as long as both sides of the fuse are the proper wires.

When I follow the diagram, wires go to the headlight switch and/or hazard switch as well as the relay board. Headlight switch is not a auto parts store part which means time and money to replace. I haven't looked for hazard switch yet and don't even know if either switch is bad.

If there is anyone that is in the Phoenix area and loves electrical troubleshooting, I'm happy to give them a challenge and pay for their time.