Factory Clock
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Logistics Pro
Joined: Jun 2008
Posts: 4,990
Likes: 6
From: Florida
Check the 5 amp fuse in the panel, and make sure the **** is turned to the left. 
If still no power you need to check for power at the Lt. Blue/Red wire at the headlamp switch with it on, and turned to the left. If you got power there, then the problem is in the wiring between the clock and the headlamp switch.
If no power at the Lt. Blue/Red wire, at the headlamp switch, then most likely the headlamp switch is defective.
If still no power you need to check for power at the Lt. Blue/Red wire at the headlamp switch with it on, and turned to the left. If you got power there, then the problem is in the wiring between the clock and the headlamp switch.
If no power at the Lt. Blue/Red wire, at the headlamp switch, then most likely the headlamp switch is defective.
There is power at the headlight switch. Checked all the wiring,everything is in electrical tape with the factory "bracelets" still attached.Nothing is cut or damaged.
When I chased the extension to the main harness plug behind the heater controls,the light blue/red wire has power at that main harness plug.But not at the extension.The black ground wire has no power,not at the extension,the clock,or the main harness plug.When should the black wire have power?
Post Fiend
Joined: Jul 2004
Posts: 8,786
Likes: 28
From: Northern California
Black is the ground, it shouldn't have power.
To test the ground you need to hook your lamp in series.
Hook the lamp to the Lt. Green/Yellow stripe wire, (That one has 12v) then hook the other end of the lamp to the black wire. If it lights, the ground is good.
As for not having power all the way through to the clock on the Lt. Blue/Red wire, that suggests a bad wire in that harness extention, or broken or loose spade in one of the connectors. I would fix that problem and make sure all the wires are functioning correctly in the clock harness, then plug the clock in and see if that solves anything. It may not, the clock still might be bad, but it does seem like you have a wiring issue with the clock harness too, on the Lt Blue/Red wire at least.
To test the ground you need to hook your lamp in series.
Hook the lamp to the Lt. Green/Yellow stripe wire, (That one has 12v) then hook the other end of the lamp to the black wire. If it lights, the ground is good.
As for not having power all the way through to the clock on the Lt. Blue/Red wire, that suggests a bad wire in that harness extention, or broken or loose spade in one of the connectors. I would fix that problem and make sure all the wires are functioning correctly in the clock harness, then plug the clock in and see if that solves anything. It may not, the clock still might be bad, but it does seem like you have a wiring issue with the clock harness too, on the Lt Blue/Red wire at least.
Thread Starter
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Logistics Pro
Joined: Jun 2008
Posts: 4,990
Likes: 6
From: Florida
Black is the ground, it shouldn't have power.
To test the ground you need to hook your lamp in series.
Hook the lamp to the Lt. Green/Yellow stripe wire, (That one has 12v) then hook the other end of the lamp to the black wire. If it lights, the ground is good.
As for not having power all the way through to the clock on the Lt. Blue/Red wire, that suggests a bad wire in that harness extention, or broken or loose spade in one of the connectors. I would fix that problem and make sure all the wires are functioning correctly in the clock harness, then plug the clock in and see if that solves anything. It may not, the clock still might be bad, but it does seem like you have a wiring issue with the clock harness too, on the Lt Blue/Red wire at least.
To test the ground you need to hook your lamp in series.
Hook the lamp to the Lt. Green/Yellow stripe wire, (That one has 12v) then hook the other end of the lamp to the black wire. If it lights, the ground is good.
As for not having power all the way through to the clock on the Lt. Blue/Red wire, that suggests a bad wire in that harness extention, or broken or loose spade in one of the connectors. I would fix that problem and make sure all the wires are functioning correctly in the clock harness, then plug the clock in and see if that solves anything. It may not, the clock still might be bad, but it does seem like you have a wiring issue with the clock harness too, on the Lt Blue/Red wire at least.
It's too dark now to check the wire,but i'll go out tomorrow and make sure the spade is in tightly and then re-check it.I'll post up the results when I get em.I really appreciate the help.
I'm goin out to the local yard this weekend for a new printed circuit,so I think to be safe i'm gonna look for another clock or two out of an 80-82 truck.
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Logistics Pro
Joined: Jun 2008
Posts: 4,990
Likes: 6
From: Florida
Yep,will do.Although I think most of the Broncos at my favorite are 8th gens.
Well,I went out and rechecked the connectors with the test light.I must've made a mistake last night cause the light blue/red wire is getting power to it.I took the clock apart and tested the wires to see if power was getting to the circuit board,and sure enough it was.So the problem has got to be one of those cylinder things or other funny little protrusions on the circuit board.It's such a shame,cause the clock looks mint.Oh well,i'll pick up another one on Friday.Thanks for all the help everybody.Hopefully the next clock will work,but i'm not getting my hopes up.Thanks again.
Well,I went out and rechecked the connectors with the test light.I must've made a mistake last night cause the light blue/red wire is getting power to it.I took the clock apart and tested the wires to see if power was getting to the circuit board,and sure enough it was.So the problem has got to be one of those cylinder things or other funny little protrusions on the circuit board.It's such a shame,cause the clock looks mint.Oh well,i'll pick up another one on Friday.Thanks for all the help everybody.Hopefully the next clock will work,but i'm not getting my hopes up.Thanks again.
Junior User
Joined: Jul 2015
Posts: 71
Likes: 1
From: Jackson's Point ON CANADA
Can someone tell me the location of the entry point of the extension harness into the dash?
Junior User
Joined: Jul 2015
Posts: 71
Likes: 1
From: Jackson's Point ON CANADA
Ground is Black on both sides of the wire connector.
Hot always 12v on Clock side of the connector is a RED wire; on truck side it is green with a yellow stripe.
12v key on power is Green on the clock side and White with Purple stripe on the truck side (or yellow/black).
12v dimming wire is White on the clock side and Brown on the truck side (or blue/red)
Jim
Thank you for your crystal clear explanation above. ...got the job done with your help.
(Made up a harness for less than $3 with some 14 awg. wire using these as perfect-fit terminals, and no cutting)
Cargo Master
Joined: Mar 2008
Posts: 2,560
Likes: 206
From: Washington
For those that find this thread in the future.....
I added some photos of the extension harness in my photo gallery.
JimsRebel's Albums - Ford-Trucks
There is text info with the pictures, so click on the photo to read it.
Jim
I added some photos of the extension harness in my photo gallery.
JimsRebel's Albums - Ford-Trucks
There is text info with the pictures, so click on the photo to read it.
Jim
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Posts: 88,826
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From: Simi Valley, CA
15000 is the clock itself, 15A000 is the dealer installed kit.
Laughing Gas
Joined: Jan 2013
Posts: 1,015
Likes: 4
From: Gulf Coast, MS
On 1980-1982 clocks, you pull the date or time buttons out, (Just like on a push button radio) to set them. Make sure that the date, and Time buttons are not pulled out at the same time. Press on them to make sure they are engaged. Having both pulled out will make the clock read all 88:88 's or malfunction.
1983-1986 clocks are different and are not set or work like above. (Mentioning this to try and eliminate confusion if people were wondering)[/QUOTE]
How does the 86 clock work for setting the time and date??
1983-1986 clocks are different and are not set or work like above. (Mentioning this to try and eliminate confusion if people were wondering)
[/QUOTE]How does the 86 clock work for setting the time and date??
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