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Discussion Starter · #1 ·
For the life of me, I can not find via all of the internetz and Googles, where the accessory delay relay is located?! I've got a 2002 F250 7.3L. Can someone please tell me where it is, and how to get to it?
 

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The relay us behind the radio. It's controlled by the instrument cluster. Is yours acting up?


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Discussion Starter · #3 ·
The relay us behind the radio. It's controlled by the instrument cluster. Is yours acting up?


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Wow, behind the radio? That should be simple enough to get to - or is buried further down where i might have to remove the dash too :s?

My radio stays on when the engine is off and I open the door.

I am also having problems with my blower not working properly - its always on defrost regardless of selection, but i think that's a vacuum issue if I remember right.
 

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Oof. I lied to you. The accessory delay relay is in the junction box on your truck. See the picture below.

The vent issue is vacuum related.

Floor plan Text Plan Diagram Technical drawing
 

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Discussion Starter · #5 · (Edited)
Oof. I lied to you. The accessory delay relay is in the junction box on your truck. See the picture below.

The vent issue is vacuum related.

View attachment 93242
I think that relay is different somehow. I already took the relay out that you're referring to and bought a new one, and it didn't fix the problem/make any difference. Taking out that relay, however, definitely keeps the radio off. Also, when i look at the delay relay part online, its a 5-pin connector, whereas the relay you've referenced is only 4-pin.

Here is the delay relay that i can't locate in the truck: http://www.rockauto.com/info/154/RY116photo%20primary.jpg

Here is the accessory relay found on the CJB : http://www.rockauto.com/info/154/RY961photo primary.jpg
 

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Discussion Starter · #7 ·
You did follow that line to the center row bottom, right? The signal to that relay comes from the instrument cluster.

2002 - 2004 Ford Super Duty Instrument Cluster Repair | CBM


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Are you suggesting that the instrument cluster is bad?
Also - I've just spent the last hour reading over the wiring diagram from Ford, and relay K126 is definitely supposed to be a 5-pin relay. Why mine is 4-pin, I have no clue, but I'm betting someone put in a multi-purpose relay at some point when the original went bad. Going to purchase a 5-pin relay tomorrow and see if it'll plug in.
 
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