Solved 1994 Aerostar with intermittent cruise control.

[don-ohio]

Been running thru the shop manual, cleaning connections,button tests passed, and know it's not the servo or vacuum, (presently it's working)but no cause found. Have a new amplifier ordered.

 

[BrooklynBay]

Do you have LED brake light bulbs? Did you check the brake switch?

 

[don-ohio]

No leds and brake switch is okay, I think. Does not light brakes up when at rest.

 

[BrooklynBay]

Check the actuator to see if it moves freely or if it binds intermittently.

 

[don-ohio]

The servo is working perfectly now. It may still be intermittent in the future, but I installed the NOS amplifier today and it works great thru 2 test drives. Thanks!

 

[BrooklynBay]

When you said that you installed an amplifier, are you referring to the actuator?

 

[don-ohio]

No, I figured the actuator is the servo? I installed the amplifier which is beside the glove compartment. If you're on Ebay, the number to search is E9AF 9D844 AA. Just a very light 4" X 3.5" approx with 2 connectors. The cruise works like new now,so far.

 

[BrooklynBay]

Your thread was marked as being solved. Thanks for the update.

 

[BrooklynBay]

Some Ford modules such as the SRS module have internal thermal fuses. Do you still have the module? If so, could you open the module to see if it has a thermal fuse?

 

[don-ohio]

I had it apart and saw nothing that looked like a fuse. It's still working like new . Thanks!