Cruise control install

[franklin2]

Pin 3 is your vehicle speed input. You won't get anything on that I suspect till you are driving down the road. You did hook it to the grey/black vss wire from the PSOM module?

 

[Daniel McCurdy]

I lifted the truck off the ground and got it up to 30mph to test it and got no voltage at the pins on the connector. I hooked the volt meter to pin 3 and 10.

 

[Daniel McCurdy]

So I hooked pin 7 and 9 together and now have power to pins 9 and 10 but cruise control still doesn't work

 

[franklin2]

I lifted the truck off the ground and got it up to 30mph to test it and got no voltage at the pins on the connector. I hooked the volt meter to pin 3 and 10.

What voltage should you get on pin 3? Is it a A/C voltage or a chopped up DC voltage? I don't know myself. It won't be pure DC I do know that. I think the PSOM module converts the speed sensor signal to another type of signal and that is what the speed control, ABS, and ECM use for their purposes.

 

[Daniel McCurdy]

It should be dc voltage but I'm getting no voltage at all

 

[franklin2]

It should be dc voltage but I'm getting no voltage at all

Are you sure about that? Here's a thread that says it's a A/C voltage and the frequency varies according to the speed.

https://www.ford-trucks.com/forums/200915-93-f150-cruise-control-not-working-2.html

 

[Daniel McCurdy]

Interesting I never would have thought it would be ac voltage

 

[franklin2]

Interesting I never would have thought it would be ac voltage

I thought you had a manual or something you were going by? How did you install this and get it all plugged in, in the right places?

 

[Daniel McCurdy]

• There is a cruise control diagnostic forum on here I was using to test everything. All the cruise control stuff really only goes in one way you can't really mess it up.

 

[franklin2]

Never did a factory retro fit before on the cruise in these trucks. So you are saying it just plugged into the harness?

 

[Daniel McCurdy]

Yep all the wiring and connections are all ready there.