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8/03/2018 4:51 PM  #1


Turn Signal wiring continuity question

I lost my turn signals a month ago on a road trip. Troubleshooting it down to what I think is the steering column turn signal switch. I can get 10.5 volts all the way up to the blue wire at the center of the switch, but when I switch the white teflon part one way or another I don't get the voltage to the other side with the four wires that should direct the voltage to the lamps.  Should there be continuity from the blue wire to the other wires when switched?

This is the second switch I've gone through. The first one had a broken horn pin.



Last edited by Mochaman (8/03/2018 4:52 PM)

 

8/03/2018 5:51 PM  #2


Re: Turn Signal wiring continuity question

OMG...just went thru this in my 65. Switch was bad but doesn't seem to be your issue. Might give Steve Buzek a call since he has 67 (which is really cool) & might know what might be the problem.


Life is too short to drive a boring car😎
 

8/03/2018 5:53 PM  #3


Re: Turn Signal wiring continuity question

Spend the bucks and buy a NOS Ford switch, or you will be chasing this gremlin for the rest of your life.


Money you enjoy wasting is NOT wasted money... unless your wife finds out.
 

8/03/2018 5:54 PM  #4


Re: Turn Signal wiring continuity question

BTW believe 2nd switch was APC, if I recall Steve has them in stock.


Life is too short to drive a boring car😎
 

8/03/2018 5:57 PM  #5


Re: Turn Signal wiring continuity question

MS wrote:

Spend the bucks and buy a NOS Ford switch, or you will be chasing this gremlin for the rest of your life.

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^....MS made a believer outa me! Get the high dollar  FoMoCo one .
BTW..........your leg is hairy!
6sal6


Get busy Liv'in or get busy Die'n....Host of the 2020 Bash at the Beach/The only Bash that got cancelled  )8
 

8/03/2018 7:51 PM  #6


Re: Turn Signal wiring continuity question

6sally6 wrote:

BTW..........your leg is hairy!
6sal6

 
A sign of good circulation.


70, ragtop 351W/416 stroker Edel Performer heads w pro flow 4, Comp roller 35-421-8. T5
 

8/04/2018 8:03 AM  #7


Re: Turn Signal wiring continuity question

I do respect your scientific approach to the problem, so maybe this info will help.  However, the crummy metallurgy of the spring used in those switches will forever cause issues. Maybe you can get it to work until the next time it quits.


OFF position
stoplight wire connects to both stoplight bulbs
Left turn signal has no continuity
Right turn signal has no continuity

LEFT position
stoplight wire connects to right stoplight bulb
Left turn signal has continuity
Right turn signal has no continuity

RIGHT position
stoplight wire connects to left stoplight bulb
Left turn signal has no continuity
Right turn signal has continuity


Money you enjoy wasting is NOT wasted money... unless your wife finds out.
 

8/04/2018 10:58 AM  #8


Re: Turn Signal wiring continuity question

Don t get me going about turn signals.  My  cars specific failure mechanism was the after market fuse box had the power to all the box fuses go thru the cig lighter fuse.  Sooo voltage in tested good but zero volts out with the cig lighter fuse out.   Only took me  a year of BS testing until I figured it out.  Yes  I know what I'm doing,, just ask me,      

 

8/04/2018 11:51 AM  #9


Re: Turn Signal wiring continuity question

I ended up replacing the wiring harness in my column for the turn signals/flashers/horn twice.  The first one I used worked, but would not self cancel.  The second one has been in the car for over 20 years.  Both IIRC were Motorcraft brand new in the box.  I would definitely advise looking for OEM first, but be forewarned that even those can have issues.  As an electrical part they are likely going to be non returnable. 

 

8/04/2018 4:12 PM  #10


Re: Turn Signal wiring continuity question

My brake lights went out a couple of weeks ago during the state inspection. The problem was in the trun signal switch. When the turn signal is on the selected side the brake light on that side is turned off and doesn't light. When the 48 year old switch wears out the lever gets stuck half way between the turn and brake position and neither one works. It took me awhile to figure it out. I got a new switch from Rock Auto cause I didn't want a SD brand.


70, ragtop 351W/416 stroker Edel Performer heads w pro flow 4, Comp roller 35-421-8. T5
 

8/04/2018 10:44 PM  #11


Re: Turn Signal wiring continuity question

I'm on my fourth switch in as many years.  This one is NOS OEM.  The first 3 were Repops and crapped out.  The one I have now hopefully will last my lifetime.  NOS OEM costs 4 times as much ($100.00+) off E-Bay;but, worth every penny if you want one to last.


Mustang Steve Bash in Gruene, Texas September29-30, 2023
 

8/05/2018 10:14 AM  #12


Re: Turn Signal wiring continuity question

Hunderd bux?!! Are you serious!
I bought a FoMoCo from the dealer(parts guy that was switching from Ford to Chevy car. He had an original. I got it for the "get-shed-of-it price of 40 dollars" and I though that was obscene! WOW...did I get a "deal"!!
Still a good buy.
6sal6


Get busy Liv'in or get busy Die'n....Host of the 2020 Bash at the Beach/The only Bash that got cancelled  )8
 

8/05/2018 5:49 PM  #13


Re: Turn Signal wiring continuity question

Think I paid like $35-$40 for the ones I bought from the dealership in the late '90s.  They gave me a pretty decent hook up price wise on parts, because I bought an engine from them (yep, the 289 that's still in the car to this day).  I'm betting list was a good deal higher.

If anyone has a part number there's like a dozen places I can check for it.  I'm searching for some NOS stuff for my '89 GT now, and most places that carry NOS Ford stuff start at the '60s and go all the way up to today. 

www.rearcounter.com is a really good source.  www.nospartsltd.com is another good one.  Of course eBay is still often your best bet if its hard to find.  Prices can be all over the place though, so don't buy the first one you come across.  I've seen guys asking $125 for an NOS part I ended up buying for $20.  Same part, in the Ford box, just one guy was reasonable (actually probably a good bit under market they usually sell in the $40-$65 range) and the other was smoking crack. 

 

8/07/2018 8:03 PM  #14


Re: Turn Signal wiring continuity question

The 65-66 Ford NOS TURN SIGNAL SWITCH NOW GOES FOR MINIMUM $159 everywhere I looked. I think I had to pay a bit more than that.

Better than bitcoin!


Money you enjoy wasting is NOT wasted money... unless your wife finds out.
 

8/07/2018 8:08 PM  #15


Re: Turn Signal wiring continuity question

a lot of the pictures I am seeing of the NOS looks like Used and Old. I am interested in the part that Glen and Steve have on their website, but I forgot to call them today. Know they are busy with personal issues. 

     Thread Starter
 

8/08/2018 4:46 AM  #16


Re: Turn Signal wiring continuity question

You have to keep in mind that NOS at this point could be 50+ years old.  Even just sitting around on a shelf tags yellow, stuff gets dusty, etc.  Thus far everything I've bought from eBay claiming to be NOS was just that. 

The only bad experience I've had is that I just bought a set of taillight lenses that the company claimed were NOS, only to discover when they arrived that they were actually reproductions.  Then I had to spend ten minutes on the phone schooling the guy about the differences between NOS and the Ford licensed reproductions.  Unfortunately on this particular part the reproductions, even though licensed by Ford, really are not exact reproductions, and it does muddy the water that they carry both the Ford logo use the original Ford part number.  I can see the guy's point, but I still don't think I should have to eat the return shipping.  My point was that I shouldn't know the products he sells better than he does, and basically I'm now having to pay $20 for his education. 

Sorry, not trying to hijack.  Had to gripe about that to some guys I know will understand.

 

8/08/2018 7:44 AM  #17


Re: Turn Signal wiring continuity question

I'd bet you dollars to donuts that guy kept selling them as NOS anyway...frustrating.

 

8/08/2018 11:23 AM  #18


Re: Turn Signal wiring continuity question

Yeah, and that was kind of my whole point.  I paid $150/ea. for them because they were supposed to be NOS, which is a good price.  Typically they are in the $100-$20 range, you know how NOS stuff is.  Repros are $155 a set from one of 20 different vendors, with free shipping.  And my point to the guy was "what if I didn't know the difference?  Ten years from now I'm at a show in a concourse class and I lose because I have repro taillights that I thought were NOS, because someone sold them to me as NOS and I didn't know the difference.  Like that scenario would EVER happen with the car I'm building, but still

 

8/09/2018 8:27 AM  #19


Re: Turn Signal wiring continuity question

Reminds me of the time I bought some 66 taillight lenses at a swap meet, brand new. I should have looked closer.
When I got them home and went to install them, noticed the logo said MOFOCO instead of FOMOCO.
At least I had not paid much for them, but they were not the “steal” I thiugh I had gotten!

The new NOS turn signal switch I just bought was in a very new looking Ford box and the switch was new.  I wonder when they stopped making them.


Money you enjoy wasting is NOT wasted money... unless your wife finds out.
 

8/09/2018 11:46 AM  #20


Re: Turn Signal wiring continuity question

I can't say when Ford stopped producing them, but as I said, I know that in say '96 they were still readily available from the parts counter.  Now that I'm thinking about it they came in a Ford box, not Motorcraft.  They were definitely blue and white, not red and white.  Not sure if they ever switched that part over the Motorcraft or not. 

Now it could be that in '96 there were still a lot of them sitting on a warehouse shelf, or at the dealership parts departments, but at that point the car was already almost 30 years old and I can tell you from searching for parts for my '89 GT (ironically about the same age now that my '67 was when I was restoring it) that most parts for that car from Ford are NLA.  One switch in ten might still be available, whereas in '96 I'll bet I could have gotten almost any switch for my '67.

Part of that is that in the late '00s new systems of inventory management designed to reduce costs meant dealerships carried less and less parts.  The days of them having nearly any common part when you walked through the door are gone.  Today, if its not an oil filter or other common part good luck.  Yet another reason that so much commerce is moving to the net.  If I'm going to have to wait a couple days anyway, might as well pay less for it too and buy from Amazon, Auto Nation, etc. 

 

8/10/2018 11:27 AM  #21


Re: Turn Signal wiring continuity question

MS wrote:

Reminds me of the time I bought some 66 taillight lenses at a swap meet, brand new. I should have looked closer.
When I got them home and went to install them, noticed the logo said MOFOCO instead of FOMOCO.
At least I had not paid much for them, but they were not the “steal” I thiugh I had gotten!

The new NOS turn signal switch I just bought was in a very new looking Ford box and the switch was new.  I wonder when they stopped making them.

 
I bought a NOS Ford switch on eBay last year. The blue and white Ford box looked like it could be 40 years old, that subtle degradation of the pasteboard box sitting in the air for a long time.

A new looking Ford box would make me wonder if there is a small shop somewhere in China making turn signal switches AND Ford boxes. Or maybe Ford is still making (or subcontracting the manufacture of) the switches. It’s possible that the jigs and fixtures for making the switches were sold off and those NOS switches are actually new, made on Ford tooling, under license from Ford. I wonder how we would find out if there is a source of new NOS turnsignal switches.

 

8/10/2018 4:23 PM  #22


Re: Turn Signal wiring continuity question

Yeah, can't put anything past the Chinese.  It would not be the first time I'd seen or heard of a bogus Ford part in a bogus Ford box. 

 

Board footera


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