Author Topic: hazard button on 1970 turn signal wiring harness  (Read 304 times)

Offline RocketScientist

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hazard button on 1970 turn signal wiring harness
« on: October 25, 2017, 09:48:24 PM »
I have two turn signal wiring harnesses for my Nov 15, Dearborn 1970 B2 (std interior) and they have different knobs/buttons that activate the emergency hazard lights. One has a square tab (off a Dec 69 Grande) and the other has a round button (off a Mar 70 6-cylinder).

I was wondering if this was due to a production change or if there is one specific to my car.

Offline J_Speegle

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Re: hazard button on 1970 turn signal wiring harness
« Reply #1 on: October 25, 2017, 10:01:08 PM »
First thing that comes to mind is the possibility of it being a service replacement turn signal switch is the reason for the difference. Noticed this years ago...... and allot of the switches have been replaced over the years. But will look through my pictures while at the same time we'll get input from others. Guessing Ed would know
« Last Edit: October 25, 2017, 10:12:17 PM by J_Speegle »
Jeff Speegle

Anything worth doing is worth doing concours ;)

Offline J_Speegle

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Re: hazard button on 1970 turn signal wiring harness
« Reply #2 on: October 25, 2017, 10:54:30 PM »
Ok checked my files and I was surprised the number of shots I had with this detail since I don't normally take many interior shots of cars.

What I found focusing only on 70 Dearborn built examples

The T style with the writing on style of knob I found only  0F14273x (Possible Dec build) & 0F170xxx (Possible April build)

The round knob style I found through out the production year. Earliest 0F10173x (likely first month car) to the latest of 0F20215x (Possible June build) Some have possible build dates between the two vins posted with the T style knobs mentioned above which

Did not include restored cars but since this a commonly service part the chances of some of my examples having been changed out exists.


0F10173x - Round
0F10301x - Round
0F10865x - Round
0F11764x - Round
0F12017x - Round
0F12303x - Round
0F12291x - Round
0F13002x - Round
0F14098x - Round
0F14273x - T
0F1516xx - Round
0F157xxx - Round
0F170xxx - T
0F170xxx - Round
0R17366x - Round
0F17465x - Round
0F20215x - Round
Jeff Speegle

Anything worth doing is worth doing concours ;)

Offline RocketScientist

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Re: hazard button on 1970 turn signal wiring harness
« Reply #3 on: October 26, 2017, 12:15:55 AM »
I did not consider that one might be a service replacement. The round knob style has all the paper tags still attached but the T-style switch has no identifying tags (despite looking in good condition) and this may lend weight to your theory.

Offline cobrajet_carl

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Re: hazard button on 1970 turn signal wiring harness
« Reply #4 on: October 26, 2017, 10:52:23 AM »
Tilt switch is different from fixed. All of my original tilt switches have round knobs, but they are before 1/1/70. Service switches have rectangular.
« Last Edit: October 26, 2017, 11:00:21 AM by cobrajet_carl »
Carl

0F05R1173xx C6 A/C Grabber Orange/Black
0F05R1254xx C6 A/C Bright Gold Metallic/Ginger
0F05R1058xx 4sp Yellow/White
0F05Q1394xx 4sp Medium Lime Metallic/Ivy
0F05H1338xx 3sp Red/White
1F05C1238xx 4sp Goldenrod/Ginger
1F05J1345xx 4sp Red/Red

Offline J_Speegle

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Re: hazard button on 1970 turn signal wiring harness
« Reply #5 on: October 27, 2017, 11:14:25 PM »
Tilt switch is different from fixed. All of my original tilt switches have round knobs, but they are before 1/1/70. Service switches have rectangular.

Understand the switches are different - are the knobs?   Don't think so but want to hear what you've seen

Could find an old picture of either in NOS/service replacement form in my files
Jeff Speegle

Anything worth doing is worth doing concours ;)

Offline cobrajet_carl

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Re: hazard button on 1970 turn signal wiring harness
« Reply #6 on: October 28, 2017, 03:40:13 PM »
I guess my phrasing was nebulous. I think all original switches, tilt or fixed, had round knobs. I do have a mostly original fixed wheel Dearborn December 69 with a well worn rectangular switch, but I would have to pull the wheel to see if it is original. A January 70 San Jose fixed has a round switch.
Carl

0F05R1173xx C6 A/C Grabber Orange/Black
0F05R1254xx C6 A/C Bright Gold Metallic/Ginger
0F05R1058xx 4sp Yellow/White
0F05Q1394xx 4sp Medium Lime Metallic/Ivy
0F05H1338xx 3sp Red/White
1F05C1238xx 4sp Goldenrod/Ginger
1F05J1345xx 4sp Red/Red

Offline J_Speegle

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Re: hazard button on 1970 turn signal wiring harness
« Reply #7 on: October 28, 2017, 06:07:31 PM »
I guess my phrasing was nebulous. I think all original switches, tilt or fixed, had round knobs. I do have a mostly original fixed wheel Dearborn December 69 with a well worn rectangular switch, but I would have to pull the wheel to see if it is original. A January 70 San Jose fixed has a round switch.

Thanks - that was my conclusion also - Thanks again
Jeff Speegle

Anything worth doing is worth doing concours ;)

Offline Mike_B_SVT

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Re: hazard button on 1970 turn signal wiring harness
« Reply #8 on: November 01, 2017, 09:36:55 PM »
My understanding is that for '70 at least, the round switch is right, and there is an "early" and "late" version of the switch / harness assembly.

http://www.mustangandfords.com/how-to/interior-electrical/1501-how-to-identify-1970-1973-mustang-turn-signal-switches/

If you need part numbers for the '70 turnsignal switch versions, I can get them.  Went through the hoops 2 years ago when I replaced my switch.  Aaaand now I'm doing it again!  Lucky me!


Mike B.

2003 Mustang Cobra Convertible
1 of 354 in Sonic Blue

1970 Cougar Eliminator (Competition Gold / Black Decor Interior), 428SCJ, Ram-Air, 4-speed w/ Hurst shifter
Built: Dearborn, Oct 6th, 1969
Cat Bites Man!

Offline RocketScientist

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Re: hazard button on 1970 turn signal wiring harness
« Reply #9 on: November 02, 2017, 12:07:29 AM »
Thanks Mike but I'm OK with numbers. I had a good looking switch but it now seems to be a service replacement. I am lucky that I found an original harness out of a donor car last week and the differences between the two had me confused. The million dollar question will be if the donor harness will actually work!

Has anyone tried swapping over the switch to a service replacement harness. Then you would have the looks of old but the serviceability of a new unit.

Offline cobrajet_carl

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Re: hazard button on 1970 turn signal wiring harness
« Reply #10 on: November 02, 2017, 01:00:43 PM »
Thanks Mike but I'm OK with numbers. I had a good looking switch but it now seems to be a service replacement. I am lucky that I found an original harness out of a donor car last week and the differences between the two had me confused. The million dollar question will be if the donor harness will actually work!

Has anyone tried swapping over the switch to a service replacement harness. Then you would have the looks of old but the serviceability of a new unit.
I think that on January 1 1970 an ignition key warning buzzer was added.
Carl

0F05R1173xx C6 A/C Grabber Orange/Black
0F05R1254xx C6 A/C Bright Gold Metallic/Ginger
0F05R1058xx 4sp Yellow/White
0F05Q1394xx 4sp Medium Lime Metallic/Ivy
0F05H1338xx 3sp Red/White
1F05C1238xx 4sp Goldenrod/Ginger
1F05J1345xx 4sp Red/Red

Offline Mike_B_SVT

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Re: hazard button on 1970 turn signal wiring harness
« Reply #11 on: November 02, 2017, 01:21:10 PM »
Thanks Mike but I'm OK with numbers. I had a good looking switch but it now seems to be a service replacement. I am lucky that I found an original harness out of a donor car last week and the differences between the two had me confused. The million dollar question will be if the donor harness will actually work!

Has anyone tried swapping over the switch to a service replacement harness. Then you would have the looks of old but the serviceability of a new unit.

From going through Cougar taillight troubleshooting, my understanding is that the wires at the switch assembly are rivetted in.
http://www.thuntek.net/cougars_unlimited/TurnSignalSwDiagnosis.pdf

But I was thinking about the same thing.  I'll now have 2 bad switches in my collection, so if I can figure out a good way to simply repair them, that would save some dough in the future, while still leaving me with an original-appearing hazard switch and harness.

I don't see why you couldn't drill out the rivets, repair the switch, then re-rivet it.  Maybe add some solder in there to give better continuity and longevity?

West Coast Classic Cougars has a video on repairing the cam portion of the switch as well, which might add some useful knowledge.
https://www.youtube.com/watch?v=ddxBfWYifQc

Good luck, and keep us posted on how your switch repair / conversion turns out!


I think that on January 1 1970 an ignition key warning buzzer was added.

I'm not sure about that.  My Oct '69 built Cougar has a key buzzer and it was still sporting the original switch.  The previous owner had kindly cut the buzzer wire down at the connection, so I had to repin it.  However, my replacement NOS switch did not come with a buzzer, so I had to pull it through the harness sleeve and swap it over to the new switch.

« Last Edit: November 02, 2017, 01:24:27 PM by Mike_B_SVT »
Mike B.

2003 Mustang Cobra Convertible
1 of 354 in Sonic Blue

1970 Cougar Eliminator (Competition Gold / Black Decor Interior), 428SCJ, Ram-Air, 4-speed w/ Hurst shifter
Built: Dearborn, Oct 6th, 1969
Cat Bites Man!

Offline RocketScientist

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Re: hazard button on 1970 turn signal wiring harness
« Reply #12 on: November 03, 2017, 03:04:58 AM »
Does that mean that the Cougars got the buzzer before the Mustang? I didn't consider the buzzer operation and so that seems to be another complication with the switches - no wonder it is so difficult to get something that is correct.

Those links are great which means I can test a switch before installing it. Previously I thought the only way is to stick it in and hope for the best.