Topic: 1967 Hood Turn Signal Wiring Harness

[196667Bob]

Jim : I see what you are saying, It looks like the #10 is for one of those semi-circular plastic clips that is about 1-1/2" long and another ground ? Seem odd that there would be 2 ground wires. Unfortunately, I don't have access to my original harness right now, so I can't check it out in person. With the #10, it looks like we're talking about 3 screws, not 2. You do see the 2 marked as # 6, don't you ?

Bob

[jwc66k]

The two 42120-S36 screws, item 6, are used on the hood, one for a clip, the other for a ring lug of a black wire, identified as wire "C". Screw 55378-S36, item 10, continues the hood ground continuity to the body at the firewall (cowl) with a ring lug. It too, is identified as wire "C", black. These are the engineering specified hardware items. What was actually used is a puzzlement.
Jim

[196667Bob]

Look at Jeff's last (5th) picture in Reply # 6. It shows all 3 fasteners in question. This might be the best thing to go by. In looking at the 1967 Electrical Assembly Manual, the 1960-68 MPC and the 1965-72 MPC, there are discrepancies between all. For example, the item #10 screw previously mentioned (55378-S) is shown as "Not Serviced" in the 1960-68 MPC, yet in the 1965-72 MPC (there is no Illustration in the 1967 MPC), it is shown as 373615-S, which is a very unusual piece of hardware (see attached). The "lower" 42120-S shown in the Assembly Manual is shown as 34198-S in both the 1960-68 and 1965-72 MPC's, and is also noted as not serviced. Thus, why I say the Assembly Manual coupled with Jeff's picture seem to be the best conclusion.

Bob

[67GT500]

Thanks for all the input.. i think i have enough info to find the correct screws that will do the job.. or at least get close..

[196667Bob]

Attached are Illustrations that I should have attached to my last Reply.

Hope this helps clarify (?) things.

Bob

[jwc66k]

One good thing has emerged from this thread. The hood mounted turn signal installation page is missing from the 1968 Mustang Electrical Assembly Manual. As a result of that omission, I did not include those hardware items used in my spreadsheets, I can only enter what is available from the assembly manuals, I cannot enter what is not, unless someone points out the omission. I will use the 75 MPC as reference in this case. The hardware will show up in the next revision.
Thanks.
Jim

[196667Bob]

Jim : I think you should reconsider and use the 1967 Assembly Manual. First, we all know that a lot of Hardware changed and was replaced by other numbers between 1967-68 and 1975 when the 1965-72 MPC was printed. Next, there is no clue as to what 34198-S is (AMK shows it as a Nut ?). Finally, based on Jeff's pictures, coupled with the 1967 Assembly Manual, that seems to be most accurate.
My opinion.

Bob

[jwc66k]

Jim : I think you should reconsider and use the 1967 Assembly Manual. First, we all know that a lot of Hardware changed and was replaced by other numbers between 1967-68 and 1975 when the 1965-72 MPC was printed. Next, there is no clue as to what 34198-S is (AMK shows it as a Nut ?). Finally, based on Jeff's pictures, coupled with the 1967 Assembly Manual, that seems to be most accurate.
My opinion.

Bob

I can see where you think I'm using the MPC first. In situations like this, a missing page, I add a note (in this case), "No 68 Dwg" as a disclaimer when I use another year's documentation. I will use the 67 Electrical manual as a start, and use the MPC to confirm or document where a specific difference is found. I found one already. It appears the MPC uses the 68 hood as a basis for service.
Unfortunately, pictures do not depict accurate size, nor color. Position and possibly head type and markings are the best you are going to get. Thread size and teeth per inch, and length do not come thru very well.
Jim

[BKnapp]

....It appears the MPC uses the 68 hood as a basis....

Jim, your hardware spreadsheet is amazing and an invaluable resource! I am curious which MPC (67-68 or 65-72) you are referring to and the factors that come to your attention. I only ask because I am trying to determine how to make my under hood harness more accurate and I found the 3 sources pictured above very interesting and in conflict with what I thought I have learned.

Thanks!

[jwc66k]

Bill,
I'm using a paper copy of the 75 MPC. If you want a pdf copy, download from this site -
http://squarebirds.org/Manuals/1965/1965-72FordPartsTextCatalog/
It's 45 files, about 430mb. I set mine up in two directories, one parts, the other illustrations.
Jim

[jwc66k]

Jim : I think you should reconsider and use the 1967 Assembly Manual. First, we all know that a lot of Hardware changed and was replaced by other numbers between 1967-68 and 1975 when the 1965-72 MPC was printed. Next, there is no clue as to what 34198-S is (AMK shows it as a Nut ?). Finally, based on Jeff's pictures, coupled with the 1967 Assembly Manual, that seems to be most accurate.
My opinion.

Bob

Uh, Bob,
I hate to say this, but we've been chasing our tails. The 1968 hood mounted turn signals are documented on AM0023 page 16, E8-8135-1.
Jim

[196667Bob]

Uh, Bob,
I hate to say this, but we've been chasing our tails. The 1968 hood mounted turn signals are documented on AM0023 page 16, E8-8135-1.
Jim

Jim : Yes I see that; however, now I'm confused. I thought that all of this discussion was about the OP's question, in regard to '67's ? I know you need to know about the 68's for your Spreadsheet, which at least the page you noted takes care of. Now we do see that there is a difference in what was proposed for 67's versus that for 68's. It looks like item #10 on the 67's which was a machine screw, is now, on 68's (item #8), a self-drilling hex, washer head sheet metal screw.

Bob

[jwc66k]

Jim : Yes I see that; however, now I'm confused. I thought that all of this discussion was about the OP's question, in regard to '67's ? I know you need to know about the 68's for your Spreadsheet, which at least the page you noted takes care of. Now we do see that there is a difference in what was proposed for 67's versus that for 68's. It looks like item #10 on the 67's which was a machine screw, is now, on 68's (item #8), a self-drilling hex, washer head sheet metal screw.

It was, and I drifted off topic, but found my concerns were addresses differently in 1968. I hope you enjoyed the ride.
Jim

[196667Bob]

+1