HAZARD WARNING M series

[plasticpig72]

Since i have had my 1976 3000M the Hazard Warning hasn't worked.
When i switch it on only the Light comes on at the Dashboard and stays on.
I have looked at the back of the switch and only 4 of the 6 Pole Connections have been used.
Surely all 6 should be used.
For me the 4 grouped together should be for: a.) live feed from Hazard Flasher Unit. b.) warning Light in Dashboard. c.) Right Indicateurs green/white. d.) Left Indicateurs green/red.
The other 2 pole connecters should split the suppy wire between the Indicator Switch on the Steering Column and the Normal Indicator Flasher Unit.
As i understand when the Hazard Switch is OFF the 2 pole conncters are closed Circuit so the normal Indicators can function. When ON open Circuit to stop Normal Indicators being powered the same time as Hazard.
When Hazard ON the 4 Poles are all LIVE for Hazard Flashers to function.
Could someone help please i'm not good at Auto Electrics.
Alan

[Penelope Stopit]

Oh yes you are good at auto electrics

Hazards do work as you've posted above



Green @ hazard switch terminal 6 is fused ignition

Light-Green/Purple @ hazard switch terminal 4 will flash a warning light when hazards are on

Brown @ hazard flasher unit is fused battery supply

[plasticpig72]

Thanks Penelope,
you've made my day at least i'm not losing my Marbles yet. I'll just print your very nice Wiring Diagram
cheers
Alan

[Adrian@]

None of the M series run the switches using post 5 or 6. A@

[plasticpig72]

Thanks Adrian,
for the info, i'm learning all the time.
Does the 3000M also just use 1 Flasher Unit or 2.
I can only find 1 Flasher Unit on my 1976 3000M.
But on my 1978 3000S it has 2 Flasher Units.
Surely not using Terminals 5 and 6 would mean the Normal Indicators are not disabled when the Hazard Switch is ON.
Maybe i'm missing something but it's difficult for me to follow the Wiring logic only using 1,2,3,4 Terminals.
cheers
Alan

[Penelope Stopit]

plasticpig72 said:

Surely not using Terminals 5 and 6 would mean the Normal Indicators are not disabled when the Hazard Switch is ON.
Maybe i'm missing something but it's difficult for me to follow the Wiring logic only using 1,2,3,4 Terminals.

You're correct

There is no logic in not cutting the supply from the indicators when switching the hazards on

With the ignition off and hazard switch on, If the indicator switch is in the left or right turn signal position, the hazards circuit will turn the ignition on and perhaps off through the indicator flasher unit

Keep it a secret, don't tell anyone

[plasticpig72]

Mums the word my lips are sealed.
I just need to wait for the delivery of a Flasher Unit and Shrink Sleeve. So i can once again dive into the Bird's Nest and Can of Worms behind the Switch Panel.
I hope i don't get any nasty Smoke Signals.

Alan

[Penelope Stopit]

Ok then

You could wire in a single 2/4 (+ 2x5 watt) x 21 watt electronic flasher unit but would have to alter wiring

Edited by Penelope Stopit on Thursday 20th February 17:47

[plasticpig72]

I've just had another look for the Hazard Warning Flasher Unit and found it. Screwed on back of Dashboard between the Rev counter and Speedo. No alloy case on it and in bad condition. A pig of a job to get at. I just need to wait for new Flasher Unit to arrive.
I have found the bullet connector on Steering Column that feeds the Indicator Stalk (green/brown)
Alan

[Penelope Stopit]

Good news then, can easily break the circuit at the stalk

You surely are an auto electrical engineer

[plasticpig72]

Well the Hazard Flasher Unit arrived in the post today. I have plugged it in and the Hazards work correctly BUT only with the Ignition and Indicators in off position.
So i've ordered some Cable Light Green/Brown to do the job correctly.
Why for the sake of 1 metre of Light Green/Brown Cable TVR never did the job correctly is beyond me. You don't need to be a Blackpool Rocket Scientist surely
Alan

Edited by plasticpig72 on Monday 24th February 15:20

[plasticpig72]

To finish the blog,
i have wired in the 2 connections (on hazard switch) never used by TVR on "M" series using light green/brown wire.
This cuts the Indicators Circuit when Hazard Warning is switched on. This is correct Auto Electrics practice but in TVRs wisdom they never did.
I hope this helps other TVR "M" series owners so they can correct this TVR oversight.
Cheers
Alan

[Adrian@]

plasticpig72 said:

To finish the blog,
i have wired in the 2 connections (on hazard switch) never used by TVR on "M" series using light green/brown wire.
This cuts the Indicators Circuit when Hazard Warning is switched on. This is correct Auto Electrics practice but in TVRs wisdom they never did.
I hope this helps other TVR "M" series owners so they can correct this TVR oversight.
Cheers
Alan

There would be a safety issue relating the two spare connections on the 'M' series (OR Vixen, 1300,2500) 'Arrow' type 'Hazard' switch (it is after all a modified DPST switch NOT a hazard switch) and should NEVER be connected in this way. A@

[plasticpig72]

Thanks Adrian for the help and information.
You have much more knowledge than me on TVRs.
If i only connect the 4 connections as original and not use the other 2 a strange thing happens.
Hazard ON and Ignition ON and Indicator ON,
I get the Hazard Warning flashing and the Indicator Warning flashing at the same time.
Seems strange to me. Maybe i need to check the Wiring on both Dash Warning Lights.
Surely when the Hazard Switch is ON it should disable the Indicator Switch like Penelope's diagram.
I must be doing something wrong.
Thanks
Alan
ps. the Hazard Warning switch is the same as MGB Hazard Warning which can be sourced new in USA

Edited by plasticpig72 on Saturday 29th February 08:18

[Penelope Stopit]

plasticpig72 said:

ps. the Hazard Warning switch is the same as MGB Hazard Warning which can be sourced new in USA

All is good then

Anyone using a DPST switch can wire in a relay to break the indicator circuit when it is switched to the on position

[plasticpig72]

Thanks Penelope,
have a nice W/E.
I'll be taking my 3000M out for a Car Club run along the Brittany coast on Sunday (with a big smile on my face)
Merci bien
Alan

[Dollyman1850]

Heres another Idea.. Simplify your vehicle wiring and just omit them

N.

[Penelope Stopit]

plasticpig72 said:

Thanks Penelope,
have a nice W/E.
I'll be taking my 3000M out for a Car Club run along the Brittany coast on Sunday (with a big smile on my face)
Merci bien
Alan

You also

Enjoy the drive, you won't be a hazard

[plasticpig72]

Hi Neil,
Don't be sheepish and tell us what you do when you fancy a flash. I understand you're a bit of a bright spark
Alan

[Dollyman1850]

plasticpig72 said:

Hi Neil,
Don't be sheepish and tell us what you do when you fancy a flash. I understand you're a bit of a bright spark
Alan

I am not into incorporating lighting which is not required.. Cars built prior to 86 in UK don't need them.. It isn't hard to get a car fully off the road in the event of a breakdown.. In my mind it is just a load more connections and wiring not required I can't really think of any time in the last 20 years when I have used them on any car.