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Ignition switch part # help

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Old 10-15-2018, 10:19 PM
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Ignition switch part # help

hey guys,

i would really appreciate some help with an ignition switch part # for my 77 F250 2wdr. It seems as though there are 3 different types. I tried the search function, but did not have any luck.

VIN: F25SCY23454

thanks!
 
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Old 10-15-2018, 10:38 PM
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Originally Posted by _mtnbiker
i would really appreciate some help with an ignition switch part # for my 77 F250 2WD .. It seems as though there are 3 different types.

VIN: F25SCY23454

D6TZ-11572-A .. Ignition Switch - 6 blade terminals (Motorcraft SW-1317) / Marked: D6TB-11572-AA / Obsolete

Applications: 1977 F100/350 & Econoline.
 
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Old 10-15-2018, 10:43 PM
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Look at the plug and the back of the switch (take it off the back side of the switch and see if it is a 4, 6 or 9 blade connector? I bet a smaller 4 or 6 pin, that might help narrow it down.

https://www.ford-trucks.com/forums/1...l#post14696846 scroll down a bit.

9 blade pic here. https://www.ford-trucks.com/forums/1...l#post14696849
 
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Old 10-15-2018, 10:46 PM
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D6TZ-11572-A = NAPA ECH KS6643 https://www.napaonline.com/en/p/ECHKS6643
 
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Old 10-15-2018, 10:47 PM
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Originally Posted by NumberDummy
D6TZ-11572-A .. Ignition Switch - 6 blade terminals (Motorcraft SW-1317) / Marked: D6TB-11572-AA / Obsolete

Applications: 1977 F100/350 & Econoline.
Originally Posted by 77&79F250
Look at the plug and the back of the switch (take it off the back side of the switch and see if it is a 4, 6 or 9 blade connector? I bet a smaller 4 or 6 pin, that might help narrow it down.

https://www.ford-trucks.com/forums/1...l#post14696846 scroll down a bit.

9 blade pic here. https://www.ford-trucks.com/forums/1...l#post14696849
thanks to both of you for the quick responses. Much appreciated. The switch seems to stick in the run position every so often, causing the battery to die. I will pop it apart when I get a chance and see how many pins it has.
 
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Old 10-15-2018, 10:48 PM
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Originally Posted by DB429SCJ
D6TZ-11572-A = NAPA ECH KS6643 https://www.napaonline.com/en/p/ECHKS6643
thanks, much appreciated!
 
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Old 10-15-2018, 10:50 PM
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If it just a sticking tumbler inside the switch, take it out (the key tumbler), clean it, put it back in and save you some $$. Having the actual key and a paper clip makes is way easier.


 
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Old 10-15-2018, 10:53 PM
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Originally Posted by 77&79F250
If it just a sticking tumbler inside the switch, take it out (the key tumbler), clean it, put it back in and save you some $$

Having the actual key and a paper clip makes is way easier.
sounds great. I’ll have a look before I order. I have narrowed down the problem to the switch, that would be great if it could just be cleaned up.
 
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Old 10-15-2018, 10:57 PM
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Some times it is a a bad tumbler, or a bad switch. Plastic cracks, contact tabs loose, ark and spark. or just plains worn out. You do know how to get the ing switch out the dash right? See the 3 cuts in the ring around the ing sw on the outside of the dash/body? Small flat tip screw driver and just tap in one cut in a counter clockwise direction for a bit then loosen the rest way up by hand and remove.
 
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Old 10-15-2018, 11:09 PM
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Originally Posted by 77&79F250
Some times it is a a bad tumbler, or a bad switch. Plastic cracks, contact tabs loose, ark and spark. or just plains worn out. You do know how to get the ing switch out the dash right? See the 3 cuts in the ring around the ing sw on the outside of the dash/body? Small flat tip screw driver and just tap in one cut in a counter clockwise direction for a bit then loosen the rest way up by hand and remove.
nice. That’s a big help. I’m not going to lie, I wouldn’t have figured that out without the help of those videos. Thanks a lot!
 
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Old 11-26-2018, 10:36 AM
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Update

Just thought I would update this in case it helps anyone in the future. I ended up replacing both:

- ignition switch
- lock cylinder.

When I got them apart, I initially thought it was the lock cylinder as it was sticking. After a thorough clean, it still wouldn’t turn. Therefore I ordered in a new lock cylinder, put it back on the original ignition switch, and put it in the truck. It would still stick in the on/run position. Therefore, I ordered in a new switch and all is good. Still fighting electrical issues elsewhere, but that’s what a project is all about!

thanks for the videos, I would have not figured out how to remove the lock cylinder without them.
 
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