ConcoursMustang Forums
1st Generation 1964 1/2 - 1973 - Questions & general discussions that apply to a specific year => 1968 Mustang => Topic started by: Oz390 on March 30, 2013, 01:11:26 AM
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Does anyone make the correct type with the tabs on the end to clip into the OEM style bracket above the brake pedal? The new ones I have don't have the tabs so just flop around under the dash....
Think its a C5AB-13350-D
???
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I do not think there are any new flashers that mount in the square clip. Tung Sol made the originals. I see them on EBay from time to time. In 68 Ford also used a spring clip holder, you could change to that type of mounting. Marty
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So in poking about I see a variety of Tung-sol flasher units in various colors. I have a Tung-sol 224 in light blue in the S GT coupe. Is this correct or just a working replacement from some time in the past? What is the OEM part (Dec 67, San Jose build)?
What is the difference between the various Tung-sol flashers with the same number but different colors?
Also saw reference to '68 Shelby's requiring a #323, is this correct?
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The standard flasher is usually a 552. 68 Shelbys got a yellow 323 in the turn signal flasher (not emergency)
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So searches for a Tung Sol 552 come up scarce. What is the difference in the 552 vs others? No real data I can find on why one or the other is used. I am guessing voltage, load, timing, etc based on 12V/6V, number of bulbs and dual vs single filament.
And is the 552 for both the Emergency and Turn signals? Or did they use different items other than the way they clip in (e.g. two 552's one with "plug-top" and one without? If using a 224 would if work in both spots?
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I was looking at a Scott Drake catalog and saw that they had a flasher that appeared to have the top mount. You might want to check it out.
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I found a bunch of not-correct 224's as they fit and seem to work fine. If someone can see it after install to ding me, good for them! ;)
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And I am still curious about the differnces, assuming some capacitance difference or slightly different bi-metal strips (not sure exactly which they use, think it is the latter) to adjust for load/rate of "blinkage"...
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Ford used a different combination of bi-metallic strip in its flashers to compensate for different numbers of lamps to get a consistent flash rate. When voltage was applied to the flasher, the different metals, steel and copper for example, heated and expanded at different rates and, as the two metals were attached at each end, they bent and the contact at the end to another fixed contact opened. That turned off the circuit, the strip cooled and contact was made again, which heated again - you get the idea. There was a specific electrical resistance that was designed in the bi-metallic strip for two bulbs, turn signals, and four or six, emergency flashers. If you had a trailer wired in, that changed the resistance of the circuit and the flash rate would change. The contacts were made from alloys that reduced arcing. It was simple, no other electrical or electronic component were used, and it worked. The 5 volt constant voltage regulator works on a similar principle.
Jim
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I'm dragging this one up because (1) am at this stage and (2) I don't see where there was a direct answer.
According to the 67 and 68 MPCs, the Ford part number used was C5AZ-13350-B. Some of the listings - other vehicles, various years in the 60-68 manual, list the Tungsol number. Not the case for the C5AZ-13350-B. In the 67 MPC there is a cross reference to Rotunda sales No. R-13L.
I installed an over the counter Ford part in 1981 and it was a light blue plastic unit. I don't recall what was pulled out, too many years... Anyway I always thought that it was strange to be plastic - the emergency flasher has a metal housing, as does the autolite relay for seat belt warning.
I know it won't be seen, but I'm still interested to hear if anyone has a known original, and if so, what it is. I have a few extra interior décor clusters in storage, I'll be looking for clues there also.
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I've got the light blue plastic Tung-Sol 224 and the Autolite C8ZB-13550-B, along with several dozen other flasher cans. Send me a PM with a specific number and let me see if I have one or not.
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While Randy is looking, I did some more looking myself. I searched through my stash and found three Tung Sol blue plastic flasher units, and nothing else. Based on what I'm seeing, I think that the blue plastic unit is original for 67. This is primarily driven from how it snaps onto the back of the instrument cluster. If it was housed in a metal container, there would need to be some sort of adapter bracket/clamp similar to the 67 emergency signal flasher, but none is shown on the shop manual or in the MPC (67 or 68).
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Yeah, I see lots of those blue Tung-Sols. I did find a C7 flasher can, which makes me think that a C5 variant is the wrong one for 1968. I wonder if the part number listed in the MPC is the engineering number (or part number) and what's on the can is the equivalent of the casting number.
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I just pulled a light blue one out of a June 68-San Jose car an hour ago. It is typical for 68 at least in my findings.