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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

What is this?

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Old Apr 20, 2025 | 12:46 PM
  #1  
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What is this?

What is this? It's on a 93 f150.


unplugged it makes no change in how it run. Can't see what it's wired into. Yellow red and Orange wires
 
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Old Apr 20, 2025 | 12:57 PM
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OBD port with cover.....
 
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Old Apr 20, 2025 | 01:01 PM
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Is that factory? I thought it was under the hood on these years.
 
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Old Apr 20, 2025 | 01:09 PM
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Just a guess.
My Bronco is 200 miles away and I am fairly certain I have a port inside, it has been years since I have had to do any electronic troubleshooting on it. Dad drives it more than I do.

It may be an aftermarket tune port added. The screws do not look standard to Ford and show rust. Screws may have been replaced at some time and may be stock port...

Again just a guess.
 
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Old Apr 20, 2025 | 01:14 PM
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Ok thanks. I'm new to these trucks.
 
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Old Apr 20, 2025 | 01:19 PM
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Does not look like any OBD port I’m familiar with, and 1993 should be OBD with the connector under the hood on the left fender.

Possibly a security system. The part that detaches is a ‘card’ programmed to the system. You’ll have to trace the wiring back to where ever it goes. Possible it has been deactivated, and just left there. Also possible it will not start with the card removed, but will run if the card is removed while running.

There is another thread on here with a similar system.
 
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Old Apr 20, 2025 | 01:31 PM
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Originally Posted by Jimmy's Pilot Service
OBD port with cover.....
No.

Originally Posted by JJF20
Possibly a security system. The part that detaches is a ‘card’ programmed to the system.
That is what it looks like to me.
 
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Old Apr 20, 2025 | 01:39 PM
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You are right it will not run with it unplugged before you start it. Thanks!
 
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Old Apr 20, 2025 | 04:21 PM
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Glad you figured it out. I have a similar set up in a ‘97 GM truck. I zip tied the card in so it can’t be removed, it’s never given me an issue.
 
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Old Apr 21, 2025 | 04:46 AM
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Nice to have so nobody steals your truck
I remove them regularly when they get old and no longer start with the chip in place
 
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Old Apr 21, 2025 | 07:00 AM
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Thanks for helping me. I guess it's good to have because the key cylinder will turn without the key in it. Replacing it is on my long list of repairs. Hope this forum don't get tired of my many questions.
 
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Old Apr 21, 2025 | 08:04 AM
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Try to find a factory Ford ignition lock with new keys on Ebay, better yet, buy a complete Ford lockset someday with the doors and glove box lock
On your 93, back in the day, you could have your door key measured, and then buy the right coded ignition lock (out of 5 possibilities IIRR) and have the 2 new keys re keyed to match your existing door keys
Now days, nobody in Ford parts knows how to do that anymore?
Maybe ask your local dealer, maybe they are long obsolete is why
 
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