Steering column wiring question
https://cimg0.ibsrv.net/gimg/www.for...60c0e993f.jpeg Photo by Uni Moe so my son bought a 72 camper special and the PO put a column out of a 77 into it. I’ve been fighting it for awhile now and in retrospect I should have just bought a new column or at least the correct harness/ switch for it but I’m broke, so there’s that...anyway, the PO cut the 77 harness after the male end of the coupler and wired like colors together to the 72 harness. No brake lights, turn signals or flashers (the front emergency flashers work) also running lights work in front and back. while searching the forum I found an old thread with a possible solution by Uni Moe, but I’m not sure I’m reading him exactly right. this is his picture and it looks like to me you go : yellow and black from 77 to blue and yellow on the 72 Dark green from 77 to orange and blue on the 72 Dark blue and yellow from 77 to Navy and Yellow on 72 light green and white from 77 to blue and white White and blue from 77 to white and blue Light Blue on 77 to Navy blue Red and black on 77 to Dark green blue and red on 77 to custom attach to dash lights then white and red from 77 to maybe another white and red? also not sure what you mean by “2 plug and 5 plug” Uni Moe, if you’re out there and can confirm this, you’re my hero!👍 |
The only wiring in the steering column is the T/S switch. 1973/77's use different T/S switches than 1970/72 (that use only one).
1973/77 F100/350 A/T is different than M/T, 1975/77 with Speed Control is different than the other two. |
(later that same evening... Added some details as I found them. Should be mostly correct, but there are some discrepancies.)
Originally Posted by rhw
(Post 18542575)
so my son bought a 72 camper special and the PO put a column out of a 77 into it.
One way to tell on Fords is whether the turn signal switch has one contact or two. These are the brass-tipped springy thingies sticking up under the steering wheel. Another way to tell would be to look under the hood, but I'm not sure what a '72 relay would look like, if '72's even had relays available (which I think they did) but it's worth a look-see around the engine compartment anyway. If for no other reason than to know what you're dealing with. On Broncos starting in '74 the relay was a 3-wire metal shelled rectangular affair with a single screw holding it to a sheet metal surface for grounding. A Yellow wire is usually running straight from a battery connection, often at the starter relay. Does the horn work by the way? (edit: Looks like at least some '72's had horn relays, if not all of them. So we'll work on the assumption that you still have a horn relay and go from there)
Originally Posted by rhw
(Post 18542575)
...anyway, the PO cut the 77 harness after the male end of the coupler and wired like colors together to the 72 harness. No brake lights, turn signals or flashers (the front emergency flashers work) also running lights work in front and back.
And by the way, I'm only assuming so figured I'd ask, but does your column have the hazard flasher switch sticking out the side? It should I believe, but not 100% sure. While you're doing wiring stuff, as was suggested in another thread today, it's not a bad idea to (with the battery disconnected just because...) remove each and ever fuse from your fuse panel, wipe/scrape/brush the contact surfaces clean (even if they look clean) and then simply put the fuses back in. Just the act of removing and replacing the fuses will usually clean up any oxidation from the contact points that can resist flow and cause you electrical headaches while hunting down other gremlins.
Originally Posted by rhw
(Post 18542575)
Yellow and black from 77 to blue and yellow on the 72
Honestly, Blue w/yellow sounds like the horn wire, but I don't have a '72 diagram handy. Gonna' bail out on you for a bit and hunt down the diagram. But posting what I've got so far so you have a few things to think about. (edit: Yes, Blue w/yellow is the horn ground to trigger the horn relay. Does not sound like it belongs connected to the Yellow w/black to me)
Originally Posted by rhw
(Post 18542575)
Dark green from 77 to orange and blue on the 72
Originally Posted by rhw
(Post 18542575)
Dark blue and yellow from 77 to Navy and Yellow on 72
I just don't see any other Blue-ish with yellow stripes. Only the horn ground.
Originally Posted by rhw
(Post 18542575)
light green and white from 77 to blue and white
Do the turn signal indicators work with the proper side? White w/blue and Green w/white are Right and Left front respectively.
Originally Posted by rhw
(Post 18542575)
White and blue from 77 to white and blue
Originally Posted by rhw
(Post 18542575)
Light Blue on 77 to Navy blue
Originally Posted by rhw
(Post 18542575)
Red and black on 77 to Dark green
Green on the '72 "should be" the left rear running lights. Turns to Brown back at the lights to cross over to the right side. This should be the same for both years, so again the the same colors should be connected it sounds like.
Originally Posted by rhw
(Post 18542575)
blue and red on 77 to custom attach to dash lights
Originally Posted by rhw
(Post 18542575)
then white and red from 77 to maybe another white and red?
Seems correct to have them connected together.
Originally Posted by rhw
(Post 18542575)
also not sure what you mean by “2 plug and 5 plug”
So that's my assumption. Again, "for the moment and until a better theory shows up":D Back in a bit with more info. Or hopefully someone with all that cool stuff memorized will chime in first! Ultimately it sounds as if you're going to have to do some testing with a meter (both ohm and volt testing) to be sure you have everything simpatico. Can you find a part number on the turn signal switch by any chance? That might help determine if this is actually a '77 switch, or something else. Paul |
Originally Posted by 1TonBasecamp
(Post 18546979)
I'm kind of winging it here, so bear with me a bit. I did not count the wires or verify their colors yet (which might narrow it down) but does your '72 have a horn relay, :-huh or is the horn wired directly through the horn button? :confused: (edit: Looks like at least some :-huh '72's had horn relays, if not all of them. And by the way, I'm only assuming so figured I'd ask, but does your column have the hazard flasher switch sticking out the side? 1973/79 F100/350 only. ALL F100/350, Bronco's and Econolines have a horn relay thru 1977, as do 1978/79's with Speed Control. 1978/79: No Speed Control, no horn relay. 1973/79 F100/350: Emergency 4 way flasher switch made as part of the T/S switch, button protrudes from the right side of the steering column. 1970/72: Emergency flasher switch located on the right side of the steering column (see pic below). https://cimg6.ibsrv.net/gimg/www.for...5cbf97d6d5.jpg |
Thanks Bill. Finally found my '72 diagram and it did show the relay, so I was starting to "assume" (but you know where that leads...) that they may all have had them. But didn't know for sure, so I'm glad you spelled it out.
And by "all", how far back does the F100 series go? I don't remember the year ranges. I think we've talked about how my '79 did not have one (did not have speed/cruise control) so I put one in. Did it on both my 350 and Bronco and am very happy with the results. Thanks again. Paul |
Thanks for all the in depth research and help! You guys are awesome! Sorry I’ve been hijacked by my work for the last couple weeks and haven’t replied before now. (Stupid bills interfere with all my truly important stuff!😂)
so where I was, I had emergency flashers in front, not rear, had running lights all around, no brake lights or turn signals. I tried following wiring diagrams from Fordification, and thought I had it as close as I could get -no change. out of frustration, maybe desperation...I yanked the column out of my 71 XLT, put it in and all lights and flashers worked great. sooo gave up on retrofitting the 77 harness and bought the correct one off LMC truck and the steering column flange ( without the side mount hazard switch) from NPD. Going to see what I can piece together tomorrow. At a glance I have a problem with the upper steering column bearing in the column flange. The 77 is smaller than the 72. I’ve checked our four local auto parts stores, LMC, NPD, CJPony parts, Dennis Carpenter and EBay...nobody showed one that looks close to this one.😕 tried attaching some pics. Does anyone know where I can find one of these? Rubber sleeve surrounding bearing. thanks again, https://cimg5.ibsrv.net/gimg/www.for...6cca35e68.jpeg 72 column flange with too small bearinf https://cimg6.ibsrv.net/gimg/www.for...eb52a47d4.jpeg 77 flange and bearing |
Can you read that engerneering number that is inside the flange? I can see D4TA, but that is all... Maybe "Number Dummy" can tell you more info with that number.
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Originally Posted by rhw
(Post 18580443)
Once it's known to be A/T or M/T and if it's from serial number S40,001, it also fits 1974/77. With A/T, before or from serial number S40,001 .. With M/T, before or from serial number S40,001. |
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