Headlight harness ground

[tboneshep]

Well, I discovered a number of things that were a problem. Behind the dash, the right turn signal indicator bulb was missing, replaced that, discovered another flasher that I had not changed, replaced it. Also discovered that my wiring connector for the front right/left had a bad connection (short intermittent connection) that I have to replace.

So, here is what is working now:
Right Turn signal FRONT and dash indicator
Emergency flashers

This is what is still not working:
Rear passenger side (pin 5) Turn signal (I have replaced the bulb )
Front marker light with headlights

When there is more light and it is not raining, I will have to inspect pin 5 again for my wiring splice. Maybe it is bad.

[Thunderfoot]

Sounds like good progress

On the front marker lights with head lights... They work when you turn on the park lights but go out when you turn on the headlights, correct???
If so, this is normal... I believe that they changed this wiring in 71-72 so that they stayed on with the headlights...

[tboneshep]

Well, the headlight knob has two positions, the first midway position, the drivers side marker stays on, with the the headlights also on, the drivers side marker stays on, the passenger side marker never comes on except for turn signal and emergency flash indicator. First wind stor-m today with rain through tomorrow, so, probably won't be able to troubleshoot for a couple of days. Thanks Thunderfoot for keeping this thread alive!

[tboneshep]

Update on Rear drivers-side turn signal:

Thunderfoot, I re-did one of your tests, disconnected the column connector and tested the cab-side connector for the rear-driver side marker. Pin 282/5 to 810 Emergency signal with brake worked. I then reconnected the connectors, took off the butt connector for pin 282/5 and tried a direct connection, would not work. I then took off the butt connector for the front passenger side turn signal, and connected the cab side connector Pin 282/5 to the two wires now exposed, pin 2 and 283 and linked that with 283, and they both worked. If I leave it this way, is it a problem to jerry-rig it in this manner? Hate to basterdize anything, but if it works, so be-it, and will save $$ paying someone else to repair the problem, plus avoiding a ticket and whatever else. Is it fair to assume by this test that the problem is in the steering column? Only one other problem, and I will start a new thread for that one! Kudos to all involved in this thread.

[Thunderfoot]

Sounds like the problem is in the Turn Signal switch... It is just underneath the steering wheel...

If I followed you correctly on how you connected the wires your turn signals will work front and back but you won’t have any "Brake Lights" Not good...

If I remember right you did have Emergency flashers on all 4 corners, so it sounds like the contacts are probably just dirty on the turn signal switch for this rear turn that is not working...

It is fairly easy to remove the steering wheel, There is just one nut in the center and pull the wheel off... sometimes you can get the wheel to come off pulling on it, others you will have to use a puller... Most all parts stores have a puller you can rent / use...

[tboneshep]

Wow, I will have to check that out tommorow, good thing I didn't cement the deal on those 3 wires yet! Too dark to check now, we lost power here for about 5 hours from the windstor-m today. Let me run this by you, from what I experienced the other night. My Pin 5 wire for the rear passenger side column side is NOT Orange-blue, it appears to me to be green-& Somthing, which is connected to a solid green wire, When I stripped some more of that wire and did get a connection, the Rear flashers came on! That is why I played with connecting 282 directly to the front passenger side pin 2.

If I just connect the pin 2, then I get all emergency flashers. Wll check again tommorow.

On a side note, I saw a thread about the front parking lights staying on with the headlights, and saw another thread related to this:

The '67-'69 pickups' parking lights are designed to turn off whenever the headlights are on. Beginning in '70, due to 'new' Federal safety regulations, a wiring change made the parking lights stay on with the headlights. The change was in the wiring harness, not in the headlight switch, which remained the same from the previous year and also by going to a dual-filament socket with the front parking lights. You can add a simple jumper wire between the to accomplish this on a '67-'69 truck.

Since the drivers side works as expected because it is a 70 harness, and the passenger side does not (68 harness), where is the brown wire the schematic shows in the following link and can I make this work?
http://www.fordification.com/board/head ... -on%5D.jpg

[Thunderfoot]

Ok on the right front park light not working it is one of two possible problems. Look at the two diagrams that I have attached and you will see that I have colored the wires for the front and rear park / marker lights (colors are for display only)

Look at the "wire_70_park lights" at the light switch and you will see that there are 2 wires connected here... 984A goes to the right front and 285 goes to the rears and also the left front... so does yours have this wire (984A) connected there? There should be 2 wires going into the switch both "brown".

If so then it could be this...

Second thing...
If you look at the "wiring_69_park lights" at the (G) connector you see that it is pin 11 - 11A... note the location of this pin (11) on the connector... Now look at the "wiring_70_park lights" at the (E) connector you see that it is pin 984 - 984A and note that the pin (984) location is being used different from the one on the 69... (I don't know if this is correct as the diagram for the 69 is for the camper special that has the marker lights on the fenders)

[rjewkes]

may just be better to grab a 70 passenger harness for the marker lamp fix.

you may have a dead wire btween the column and the driverside harness plug under the hood.

[tboneshep]

rjewkes I have the passenger side harness from the 70 cab, but it was so basterdized with cut-off end-points that I could not figure out, that I went with the 68 I had and new was working in the 68 cab.

Thunderfoot is right again. Now I'm back to b4 square zero. My rear brake lights were working both sides, since I joined the passenger side rear to the front marker passenger side, I have a brake light, but the turn signal stops. I disjoined that connection and went back to just trying to get back to where I was, having a front turn signal. I got the front turn signal back, but now no rear passenger side brake. I have changed the light bulb, that is not the issue, and the light does come on with the headlights. So, I'm at a loss on this one. I have not yet taken the steering wheel off. Let me verify the color of the wire. I have a solid GREEN wire coming out of the 68 steering wheel column going to a solid GREEN wire on the 70 cab-side connector. Doesn't appear to be right?? Green is 282 on both, 70 & 68, but the diagram shows that pin 5 is orange-blue which I have going some where else? Too dark to find out where that is right now, will let you know when it's light again.


On the other issue with the passenger side front marker light being on with the headlights, I may not be looking at the switch, but I assumed Thunderfoot was talking about the healight switch. There are two brown wires coming out of the headlamp switch that connect to an orange colored wire. Didn't have time to see where that lead to, or verify it yet. Thanks Thunderfoot for your time and graphics!

[Thunderfoot]

There are two brown wires coming out of the headlamp switch that connect to an orange colored wire.

If both the Brown wires out of the light switch are connected to a single orange colored wire then there is something fishy going on there... One of those Brown wires has got to go to the right front park light...

I got the front turn signal back, but now no rear passenger side brake. I have changed the light bulb, that is not the issue, and the light does come on with the headlights.

The bulbs are dual element so they use seperate wires to power each element... When you did the jumper wire test did you get the right rear light to come on?? if so then the problem is in the Turn signal switch or wires on the column side.
The Green wire may be correct if the Turn Signal switch has been replaced... but do check out the other wire...