My 1961 F100 4wd could use a turn signal switch replacement. It seems the part number for a 2 wd is C2TZ13341C. For the 4Wd it is C2TZ13341D.
Since there were few 4wd models made in 1961 this turn signal switch for a 4WD is non existent. There are some 2WD versions available. Does anyone know what the difference is between the 2WD version of this part and the 4wd version? I find it hard to imagine why a turn signal switch would have anything to do with 4wd vs 2wd!

 

The T/S switch fits more than just 1961 & 4WD:

C2TZ-13341-D (replaced C1TF-13341-D & K) .. T/S Switch / Obsolete

1961/65 F100/250 4WD / 1961/66 F350/1100 (F700/1100: Except Tractor/Trailer) / 1961/66 C/CT550/1100 / 1963/66 N/NT500/1100 / 1966 F250 4WD

The following sources may not have any, since they don't update their inventory.

MCDONALD OBSOLETE PARTS CO. has 1 = 812-359-4965.

MUSTANG'S ETC has 2 = 818-787-7634.

 

Another option some people maybe were not aware of is the kit that includes the turn signal switch. Not shown in the 1964-1972 MPC as far as I can tell.

Either one of the two boxed kits includes the turn signal switch, turn signal lever, the flasher, two dash back light bulbs and a few bits of hardware to complete the project.

C1TF-13A300-D

or

C2TZ-13A300-B

I've got three spare kits now and the last one I got from Miller for $35 plus shipping. At least two more I know of

Obsolete Reliable wants $125 plus shipping.
Will McDonald Obsolete Parts wants $300 plus shipping.

Both are the C1TF-13A300-D

ND might be able to come up with some others. I've got plenty of spares and both of my trucks are in good shape at this time. Have fun!

Mine all include:

1 each - C1TF-13341-K - Turn Indicator Switch (with wiring)
1 each - C0KF-13305-AP - Turn Indicator Lever Assembly - Black **** (4WD)
1 each - C0AF-13350-A - Turn Indicator Flasher
1 each - C1TZ-13351-B - Turn Indicator Flasher Mounting Bracket
2 each - C3AZ-13466-B - Miniature Bulb (1895)

And a few clips, bolts, nuts and washers, plus the instructions.

.

 

Source: Accessory section of the 1957/68 loose leaf paper Ford Truck Parts Catalog:

C1TZ-13A300-E =

NOS PARTS SOURCE in Olathe KS has 1 = 913-220-5746.

NOS PARTS LTD in Waxahachie TX has 1 = 972-937-2201.

KLIMESH MOTOR SALES in Calmar IA has 1 = 563-562-3241.

KAMA OBSOLETE PARTS in East Bethel MN has 1 = 763-434-0123.

CARPENTER NOS OBSOLETE PARTS in Concord NC has 1 = 800-476-9653.
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C2TZ-13A300-B =

MILLER OBSOLETE PARTS in Binghamton NY has 1 = 607-722-5371.
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C1TF-13A300-D =

OBSOLETE RELIABLE PARTS in Nashville GA has 1 = 229-686-5101.

MCDONALD OBSOLETE PARTS CO. in Rockport IN has 1 = 812-359-4965.

 

TA if you still have one of these for sale I'm interested in one.

 

This switch is included in the following dealer installed T/S kit:

C3TZ-13A300-B =

GREEN SALES CO. in Cincinnati OH has 1 = 800-543-4959.

KAMA OBSOLETE PARTS in East Bethel MN has 1 = 763-434-0123.

MCDONALD OBSOLETE PARTS CO. in Rockport IN has 1 = 812-359-4965.

CARPENTER NOS OBSOLETE PARTS in Concord NC has 1 = 800-476-9653.