ConcoursMustang Forums
1st Generation 1964 1/2 - 1973 - Questions & general discussions that apply to a specific year => 1969 Mustang => Topic started by: Anghelrestorations on June 20, 2014, 01:30:53 PM
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What should have been a short two page article turned out a bit longer when you add all the information. Anyone has questions or comments let me know...should be an easy read since its mostly pictures.
http://www.anghelrestorations.com/uploads/3/1/7/6/3176630/69_70_horns_v1.0.pdf (http://www.anghelrestorations.com/uploads/3/1/7/6/3176630/69_70_horns_v1.0.pdf)
(http://i191.photobucket.com/albums/z213/azscj/DSCN7659_zps06f4b61a.jpg)
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Very nice work!
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Excellent article.....thank you.
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Thank you Marcus. Some interesting stuff. Possible spelling error at the Horn Re-in Bracket section: inference ? Brian
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Yep...spelling mistake. I see that now...will fix it over the next few days with any other feedback.
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Nicely done Marcus!
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Marcus are you sure the 70 ground wire end eyelet was for the horns & not used in 69 because wiring harness routes over to solenoid & voltage regulator & grounds there. I was told once that the reason why the horns were mounted the waythey are hi-lo- was the way the currant draws voltage & the first horn gets more juice than the second horn & could be why they go bad first or fail or something like that.
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Well, I don't know how to prove, or disprove if that's why a ground wire was added to the horn area because of that. I don't think even a wiring diagram would help with that. The main thing I wanted to point out is that in 1970 we see cars that have that extra ground wire in that area and 1969 its not there. Assembly manual shows this as well. Im guessing why it was added there and can change the wording to be more clear about that unless we have a way to figure that out better.
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Marcus are you sure the 70 ground wire end eyelet was for the horns & not used in 69 because wiring harness routes over to solenoid & voltage regulator & grounds there. I was told once that the reason why the horns were mounted the waythey are hi-lo- was the way the currant draws voltage & the first horn gets more juice than the second horn & could be why they go bad first or fail or something like that.
I agree with Ed here. The ground wire lug was simply moved in 1970 and physically routed near and along with the RH horn line. That ground lug is not horn specific: it is the general grounding point for the entire headlight harness.
A similar grounding point was used for all earlier models using foglamps. The 70 Mach 1 sportlamps have their separate grounding scheme as well.
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Believe the direction of the horn mounting hardware differed between plants
San Jose normally have the nut on the back/engine side (have 100's of examples) - Just one of those differences ;)
Nice job on the article
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Yes agreed Jeff. I just wanted to point out the assembly manuals between 1969 and 1970 show the mounting hardware orientation being different. I just want to make sure I stay away from saying there is a right and wrong way to mount them since there is too many variables from plant to plant or shift to shift like you said.
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Know its a small detail but on 69 Boss 302s the horns are located both on the passenger side even without the oil cooler option
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Yep...I just didn't know how to exactly word that without calling it the "Drag Pack Option" and creating a whole new topic of discussion. Maybe I can find a way to mention it differently in the article. Open to suggestions on how to word that...
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Maybe something like
On certain Mustang, Cougar, and Shelby models with a 428, or during 1970 the Boss 302, that were equipped with the oil cooler and 69 Boss 302's and all Boss 429's, the horns would be moved to the passenger side to make room for the oil cooler. The radiator support would be modified on the assembly line to allow the horn to be relocated on these cars.
Just an attempt ;)
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Ok...I will play around with the words and see what I can figure out along those lines.
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Well, it's no wonder they had to add a grounding wire for the horns, what with the reinforcing bracket in between that serrated bolt head and the radiator support.
So basically they ended up connecting the horn to the reinforcing bracket.
I thought only the '69 cars got the reinforcing plate. So how (relatively) common were the reinforcing plates on the '70 oil cooler cars?
Great write up! I wish it had come out a month or two ago when I was fidding with getting my horns remounted properly. Looks like I'll be going back and redoing a few relatively-minor things.
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The re-inforcement plate was not always on these cars....cant say what precentage only that they should have been and just were not always there. If you have an original paint car its possible to see if the plate was there based on the marks left (or not left) by the bolts.
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I updated the article based on everyone's input. If anyone sees an issue let me know.
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Thanks will add a link in our Library here to it. Keep up the good work :)
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Glad to share the information and put it together for future reference.
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Question about the horn bracket holes: if two are for the horns what could the other three be for ? Just curious, Thanks. Brian
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Question about the horn bracket holes: if two are for the horns what could the other three be for ? Just curious, Thanks. Brian
What three Brian?
The ones to the left of the horn mounting holes (where the bolts pass through) are indexing holes for the tabs at the horn bases. IF those are the ones your referring to
Does look like the arrow on the right, in the picture, is pointing to a hole that is a bit bigger than allot of the others I'm looking at but maybe its just than angle of the picture
These ??
(http://www.concoursmustang.com/forum/gallery/2/6-270614204141.jpeg)
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OK thanks Jeff. Actually I was looking at the pic Marcus has in his graphics showing the bracket from the back side and on a 70 radiator wall. Oh and I don't have one of these so some somewhat interesting.
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OK thanks Jeff. Actually I was looking at the pic Marcus has in his graphics showing the bracket from the back side and on a 70 radiator wall. Oh and I don't have one of these so some somewhat interesting.
Must be the support/reinforcement bracket your referring to
In that case there would be one extra hole that went unused - but I've got no idea why that one is there. The other 4 would be for the mounting and indexing
(http://www.concoursmustang.com/forum/gallery/2/6-270614205851.jpeg)
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A/C condenser mounting strap hole
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Yes....the "extra" hole...is actually always there. This is for the condenser on cars that were equipped with air conditioning. I have some pictures in the article that show that being used with the condenser.
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Yes....the "extra" hole...is actually always there. This is for the condenser on cars that were equipped with air conditioning. I have some pictures in the article that show that being used with the condenser.
Agreed both sides but in the picture Brian posted the hole appears to have been drilled out and the horn moved more towards the passenger side to use that drilled out hole as a locator for the horn - and falls short of that. Just focusing on 69's since that is the picture posted and it eliminates the other difference's with location of the horns
69 without AC
(http://www.concoursmustang.com/forum/gallery/2/6-300614172148.jpeg)
69 with AC
(http://www.concoursmustang.com/forum/gallery/2/6-300614172125.jpeg)
69 Dearborn passenger side horn mount examples
(http://www.concoursmustang.com/forum/gallery/2/6-300614173209.jpeg)
(http://www.concoursmustang.com/forum/gallery/2/6-300614174218.jpeg)