i took a 93 cab and put it on a 92 and the horn didnt work. i had this problem last time and i got a wiring diagram and changed a wire and the horn worked. does anyone have access to a wiring diagram of the 93 150 cab? then i need one of the 92 f250 with a manual

thanks

Matt

 

92 Horn:


1993 Horn:


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thanks bill, but do you have one that shows the color after the horn switch listed above? i dont see anything but db? i have a solid blue and a blue and white and i think those have something to do with it

thanks

Matt

 

The 92 ground goes to G201 on a black wire.


The 93 is grounded at G200 over a black wire with a white stripe after it goes through the speed control amp in at pin #6 DG/O wire and out on pin #10 red/light blue stripe wire (same as the PSOM ground).
1993 wiring:



/

 

ok, for some reason i remember applying power to the blue wire and grounding the blue and white. does this make sense?

 

No it does not. Are we talking about the 1992 or the 1993 trucks wiring.
Also do they both have speed control?
The big difference for the horn circuit between 1992 and 1993 is the speed control. The 1992 uses vacuum and the 1993 is all electric.

 

i am not concerned with the cruise, but need to get the horn working on the 92 f250 with a 93 f150 cab on it. ha

 

The ground wiring for the horn button goes through the speed control module and if you are using 1993 wiring the horn will not work without the speed control module.

If you are not using the 1993 speed control module and are using the 1993 wiring you must jumper the 6-10 pins on the speed control module plug to get the horn to work.

 

ok, i am confused as to what the speed control module is. is it something that i can swap to make the cruise work? that would be neat

 

Cruise Control is the GM term. Ford calls it Speed Control.
On a 1993 it located LH side of engine compartment, near brake master cylinder.

 

yea, on my 92 there is a huge vacum drum that is bolted to the fender wall.