im looking to purchase a harness for a 73 f-100, my truck has the idiot lamps, no guages, what dash harness would i need. i have a 360 with a c-6 if that matters. i also have access to a 74 cluster with the gauges in it but i know they are not interchangeable. if any one has the part numbers of the 2 diffrent harnesses it would be greatly appriciated the cab is about to go to the body shop and ill be putting it back together soon i hope. thanks giovanni

 

73 F100/350 6&8 cyl. dash wiring harness w/ lights D3TZ-14401-R
73 F100/350 w/o diagnostic system s/n below R20,001 w/ gauges D3TZ-14401-B
73 F100/350 w/o diagnostic system s/n above R20,001 w/ gauges D3TZ-14401-S

Quick question, Does anyone know what "diagnostic system" is? I've seen this in other places in the catalog but have never been able to figure out what it means. This is 1973 there aren't computers or electronics. I'm just wondering what they are talking about.

 

F10YEQ45554 is my vin i found a nos harness with this tag "D3TB 14401 BL" on it but does not match any of the numbers you gave could it be the production id , would it work in my truck, one more thing if im replacing the wiring does it matter which harness i use just as long as i get the instrument cluster that maches am i correct or are there other things i need to worry about. thanks again giovanni

could the diagnostics mean that it had test points to diagnoss issues with diffrent parts of the wiring.

 

D3TB-14401-BL is the ID number off the harness itself. It is not a Ford part number.

There are no actual Ford part numbers on any parts after 1956. Any number you find will be either a casting or an ID number.

ID number: D3TB-14401-BL = Ford part number: D3TZ14401S .. Main Wiring Harness / Obsolete

Fits: 1973 F100/350 with Oil/Amp Gauges, without diagnosis system.

My 1973/79 Ford Light Truck Parts Catalog (final edition 10/88 on microfiche), does not show a before/from a certain serial number for this harness.

The problemo with the "aftermarket" CD version of this catalog is...it was scanned from an early edition and has errors and omissions.
--------------------------------------------------------------------------------------------------------------------------------
F10 = F100 2WD // Y = 360 2V // E = Mahway NJ Assembly Plant // Q45554 = 1973.

 

ND is quicker than I am, I was crossing the assy. # over to the p/n and he beat me to it.
According to your VIN you need the wiring harness ending with "B". Your s/n is Q45554 that's lower than the R20001 break. This harness is for s/n's above the break.
Whether this one would work or not I don't know. Ford doesn't specify what the differences are between the harness'.

 

Did you notice what I typed here?

The reason my parts catalog shows only one is because D3TZ14401B was replaced by D3TZ14401S

The problem with old Ford parts catalogs is...the numbers are also old.

And...since Ford updates 10's or 1000's of part numbers every year you need the FoMoCo O-S-I Catalogs to see if part numbers have been updated....or not.

O-S-I = Obsolete-Supercede-Interchange. The above info is from the 1/1990 O-S-I catalog, which is a combined version (on microfiche) of all the previous O-S-I catalogs from 1/1975.

This updating of part numbers is the MAJOR reason you should never go by the part numbers prefix to ID what the part supposedly fits.

Using that CD version of the catalog...you may be searching all over for a certain part number, it may have been replaced...which means you are looking for the wrong part number.

Then there's this boondoggle: In the late 1980's, Ford changed the package quantity of 1000's of parts.

When they did that, they changed the part number suffixes, rendering ALL the old part numbers obsolete.

NONE of these updated part numbers are in the CD version. Some are not in the last edition of 10/88.

Here are three examples out of 1000's:

DOTZ7B097A = DOTZ7B097B .. 1965/77 NSS Selector Lever // COAZ9202A = COAZ9202B .. 1957/79 Fuel Sending Unit Float // B8T7220A = B8T7220D .. NP435 Shift Lever Retainer Cap.

 

ND thanks for the correction. Your right, I'm using the CD version of the catalog. I wish there was some way I could update this thing. I don't like to give out wrong info. It doesn't do anybody any good and only leads to frustration.
Thanks again.

 

Thanks my truck is one more part closer to life. Ill let you guys know when i get it.

 

Hi one more question, does the above harness work with factory ac or is that another harness, thanks

 

The above harness is the main dash wiring harness, the a/c system uses a separate harness so the answer to your question is yes it will work.

 

There are two wiring harnesses associated with the factory a/c system.
Fits 73/74 F100-350 w/ integral a/c
D3TZ-19A885-A From main wiring harness 14401 to blower motor resistor
D3TZ-19A885-B From blower motor resistor to ambient sensor switch

 

thanks, it was one of those oh sh** moments when you think great i got the harness but i forgot to ask if it would work with ac. I guess we all get them now and then. thanks again giovanni