Printed circuit connection

Charging, starting, lighting, gauges, HVAC

Moderators: FORDification, Thunderfoot

Post Reply
User avatar
WarEagle
New Member
New Member
Posts: 186
Joined: Mon May 07, 2012 12:46 pm
Location: Pike Road, Alabama

Printed circuit connection

Post by WarEagle »

Hey all,

I am doing a total rewire with a kit from Painless and need some help.

I'm looking at the schematic found here in the site for a '72 F100 custom. It shows the factory printed circuit connector wires for the instrument panel, but it does not match up to mine. The schematic shows 12 possible connection points with 9 wires. My truck has the same 12 point connector but has 11 wires, and the location of the color coded wires are not matching the schematic.

I realize the 2 extra could have been added at some point, but I was wondering if I am looking at the right schematic in the first place. Is there another resource for instrument panel wiring? :?

Thanks and Happy New Year!
1972 F100 300 cid straight 6
2009 F150 4.6L Super Crew
Busboy
Blue Oval Fanatic
Blue Oval Fanatic
Posts: 943
Joined: Sat Jan 24, 2015 9:51 am
Location: Nampa Idaho

Re: Printed circuit connection

Post by Busboy »

I thought they claimed that it was painless? :wink:
1967 F-100 4x4 custom cab.
Another 67 F-100 4x4 custom cab.
2016 F-150 Eco-Boost 2.7 liter. (It will smoke the tires!)
1972 F-350 Sport Custom cab & chassis.
1972 F-250 Explorer Special, Camper Special.
1971 F-100 custom. 302, C-4, p.s. p.b. factory 65 amp alternator with transistorized voltage regulator.
User avatar
two-bit
Blue Oval Fan
Blue Oval Fan
Posts: 620
Joined: Thu Jul 06, 2006 6:19 pm
Location: Michigan, Ishpeming

Re: Printed circuit connection

Post by two-bit »

Do you have the full gauge package in your truck? ie: amp, oil, fuel, temp.
Or warning lamps for oil and amp?
That may be the difference. I know the amp gauge and the amp warning light use different wiring in the harness. Maybe it is different also at the plug to the cluster? Just a guess?

Let us know what you find.
Two-bit
Living life full throttle on the North Coast of America!!!

72' F-350, DRW, 360, NP435, Dana 70, 159" WB, P.S., P.B., 12' flatbed, 10,000 GVW.
User avatar
two-bit
Blue Oval Fan
Blue Oval Fan
Posts: 620
Joined: Thu Jul 06, 2006 6:19 pm
Location: Michigan, Ishpeming

Re: Printed circuit connection

Post by two-bit »

Check out the 72' master wiring legend....
Look at the connector legend page. Close attention to C-49 and C-10.

I think this may help you out.

http://www.fordification.com/tech/wirin ... legend.jpg


Two-bit
Living life full throttle on the North Coast of America!!!

72' F-350, DRW, 360, NP435, Dana 70, 159" WB, P.S., P.B., 12' flatbed, 10,000 GVW.
User avatar
WarEagle
New Member
New Member
Posts: 186
Joined: Mon May 07, 2012 12:46 pm
Location: Pike Road, Alabama

Re: Printed circuit connection

Post by WarEagle »

two-bit wrote:Check out the 72' master wiring legend....
Look at the connector legend page. Close attention to C-49 and C-10.

I think this may help you out.

http://www.fordification.com/tech/wirin ... legend.jpg


Two-bit
COOL - Thanks!!! It does match to C-49. I have the oil and alt lights, not gauges. Where does that fall into the bigger schematic? I thought at C-49 but I couldn't find the connector like the '72 quick reference diagram has. I need to see where all the wires go to.
1972 F100 300 cid straight 6
2009 F150 4.6L Super Crew
User avatar
WarEagle
New Member
New Member
Posts: 186
Joined: Mon May 07, 2012 12:46 pm
Location: Pike Road, Alabama

Re: Printed circuit connection

Post by WarEagle »

Busboy wrote:I thought they claimed that it was painless? :wink:

LMAO, I know right? So far so good though. The kit is labeled really well, just having trouble on the Ford side of things. :thup:
1972 F100 300 cid straight 6
2009 F150 4.6L Super Crew
User avatar
Ranchero50
Moderator
Moderator
Posts: 5799
Joined: Wed Nov 08, 2006 7:02 pm
Location: Maryland, Hagerstown
Contact:

Re: Printed circuit connection

Post by Ranchero50 »

Trace the foil to see where the connections are going and deduce what needs hooked up from there. I'd much rather restore a factory harness vs. deal with an aftermarket one.
'70 F-350 CS Cummins 6BT 10klb truck 64k mile Bahama Blue

Contact me for CNC Dome Lamp Bezels and Ash Tray pulls.
User avatar
WarEagle
New Member
New Member
Posts: 186
Joined: Mon May 07, 2012 12:46 pm
Location: Pike Road, Alabama

Re: Printed circuit connection

Post by WarEagle »

Ranchero50 wrote:Trace the foil to see where the connections are going and deduce what needs hooked up from there. I'd much rather restore a factory harness vs. deal with an aftermarket one.
I know what you are saying, but there were too many splices and hanging wires. The ignition worked but not much else. Also, I decided to go aftermarket because of the extra circuits available, elec choke, elec fan, power antenna, cargo light, accessory, etc....

The issue i'm having is just making sure I am connecting correctly. I am doing the tracing but wanted a reference to confirm everything. I don't want to add power and blow some fuses!
1972 F100 300 cid straight 6
2009 F150 4.6L Super Crew
User avatar
sargentrs
100% FORDified!
100% FORDified!
Posts: 9866
Joined: Fri Jun 22, 2007 9:30 am
Location: Georgia, Jasper

Re: Printed circuit connection

Post by sargentrs »

This is about as detailed as it gets. http://www.fordification.com/tech/wiring_1972master.htm Page 5 is the instrument cluster master diagram. Connector chart may be of some help too.
Randy
1970 F100 Sport Custom Limited LWB, 302cid, 3 on the tree. NO A/C, NO P/S, NO P/B. Currently in 1000 pcs while rebuilding. Project thread: http://www.fordification.com/forum/view ... 22&t=59995 Plan: 351w, C4, LSD, pwr front disc, p/s, a/c, bucket seats, new interior and paint.
1987 F-150 XLT Lariat, 5.0/C6 auto.
User avatar
WarEagle
New Member
New Member
Posts: 186
Joined: Mon May 07, 2012 12:46 pm
Location: Pike Road, Alabama

Re: Printed circuit connection

Post by WarEagle »

OK, I'm hoping the answer to this question is as simple as I think. Basically, the only wires that are repeated in multiple circuits would be the red and black. Meaning, for example, the red-blue goes from ignition to starter relay. that color combo should not be used anywhere else on the truck. Therefore, because the C-49 schematic is not shown in the master, I can follow the color coded wires that are in the connector to know where they are supposed to go (and come from).

Is that a safe assumption? :hmm:
1972 F100 300 cid straight 6
2009 F150 4.6L Super Crew
User avatar
Ranchero50
Moderator
Moderator
Posts: 5799
Joined: Wed Nov 08, 2006 7:02 pm
Location: Maryland, Hagerstown
Contact:

Re: Printed circuit connection

Post by Ranchero50 »

Yes and no. Ford has been very good about keeping the wire number and color consistent throughout the years. When I did my wiring integration for the diesel swap I wrote down the from - to of each wire, it's color, number and purpose and it worked out well.
'70 F-350 CS Cummins 6BT 10klb truck 64k mile Bahama Blue

Contact me for CNC Dome Lamp Bezels and Ash Tray pulls.
Post Reply