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MGB 1966 MGB Roadster - Flasher Issues

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sjconant

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Hello everyone-

This is my first time and I am by no means a mechanic and trying to learn. One problem I have is that I cannot get my 1966 Roadster Blinkers to Work. I tried to search everywhere and I found that the Flasher Relay is under the Glovebox area. I was told to test the "Green" wires for power. IF there isnt any Power, that the "Hazard" switch is the issue. Here is the problem. I cannot find anywhere about where the Hazard switch is on this 1966 Roadster. Its not obvious to me. Keep in mind this car had all its electronic switches pulled by previous owner to repaint the whole car. Sadly they put some of it back not sure if everything was put back right. Anyways, I did replace the Blinker Control on the Steering column and reconnected them Color by color that I found on the Old one. The only thing missing is that this new one had a Brown Wire but there isnt a Brown to connect to under there. So I can provide pictures of my setup but I really could use some direction as to if there is a Hazard switch on this car and where it would be. Where the Flasher Relay is, there was a connector with 2 dark green wires, Another with a light Green, and antoher with Green with Red Stripe.
I really hope someone could guide me because that is the last electrical thing I need working. The Headlights work, Break lights, Running lights. I am just lost on the Turn signals.
 
Good morning and welcome!

If you don't already have this, here's a great and easy to read wiring diagram. Scroll down to the second page for your '66 B:


If memory serves, the flasher was mounted in much the same area through most of the model years - behind the glove box to the left of the wiper motor. Here's a write-up of the wiring:


Hope this helps!

Mickey
 
The wiring diagrams indicated in the previous post are worth their weight in gold to be certain. The hazard/directional system on these cars is pretty simple but not completely intuitive in how it works. I had to reconstruct most of the wiring for mine because previous owners cut away all of the connectors for the system so I spent a long time with a meter and test lamp getting whats left of my mind wrapped around how this thing works.

The key to the whole system is the hazard switch (which is located in the center lower section of the front panel near the cigar lighter). It has a 6 pin connector - 4 on one half and 2 on the other. 2 independant circuits go thru it and technically it is a selector switch, not a simple on-off. When it is set to the position marked "off", it actually turns ON the directional controls by bridging the pins on the 2 pin side. This allows power from the "hot-with-key-on" circuit to pass thrrough the directional flasher unit (normally under the dash near the wiper motor), over to the signal control switch on the column and then to the correct left or right side lamps. In this position all the pins on the 4 pin side are completely isolated from each other as well as the 2 pin side. If these 2 pins are not connected the left/directionals will not receive power, even if the directional flasher and column control switch are properly connected and in good condition.

When the hazard switch is flipped to the positon marked as "on", it disconnects the directional control flasher pins and bridges the all the pins on the 4 pin side, connecting the indicator lamps on both sides of the car together with an additional hazard indicator lamp (also in in the center section). In this position, power is drawn thru a seperate hazard flasher relay (also located in the center panel area, fed from an always hot circuit instead of the hot-with-key-on circuit). A brown wire on the alway-hot circuit comes thru a single in-line fuse holder to provide the power. Be careful with this circuit - the brown wire circuit is always hot and unfused (unlike the purple wire circuit which is always hot but protected by a fuse) - the only protection against a short circuit in the hazard system is that inline fuse.
 
Very nice, but a 66 B doesn’t have “hazard” lamps. Brown wire is a hot wire, so be careful. Green wire is ignition on power. Flasher will be a three wire configuration and is fitted with a 1/4” bolt.
 
You were helpful!
Hazards came with the MKII, and you described it very well.
MKIs have a very simple circuit, save for the indicator lamps on the dash.
 
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