Thread: Command AP60B Cruise Control fitment

I know its against the whole agricultural ethos of Isuzu ownership, but I've just finished installing a Command AP60B model vacuum actuator cruise control system to the County.
I was finding on longer transit trips that I was having issues with right foot/calf numbness from being in the one position, and there's not enough room in the footwell to safely do a bit of a foot-swapping to give it a break. I take regular breaks, but found after a couple of days that the numbness was back pretty quickly after getting back in the vehicle.
Hopefully the CC will let me vary my leg position and make things a bit more pleasant.

Installation is pretty straightforward, just a bit fiddly working out where to mount things and routing for the wires.
System consists of a command module with the input switches, control module (the brain), a vacuum actuator that gets connected to the throttle cable, and magnets/sensor that sense propshaft rotation speed.
System simply tries to vary throttle to maintain the propshaft speed as it was when you hit the "set" button and has no idea of actual road speed. It also has the usual up/down/reset functions.

Had a few issues getting the speed sensor side of things configured set up and exchanged a couple of emails with their tech support (who were very prompt to reply).
The installation manual tells you to install one magnet on the propshaft, but in my case this resulted in not being able to engage cruise above 75kmh.
Final speed sensor config is 2 magnets on the rear propshaft, and the divider wire cut on the control module
That's with the .996 ratio LT95, standard diffs and 33's (255/85-16) tyres. Also standard diameter 110 rear propshaft (not that it affects RPM if you have a different diameter eg 130 shaft, but it might affect the signal strength due to speed past the sensor...just saying...).

The other thing that stretched my brain a bit was the wiring for the brake pedal and clutch switch as there are a couple of options for how to do it.
The kit came with a momentary-on switch for the clutch that is ON when the pedal is released (so open circuit when the pedal is pressed).
One brown wire from command module goes to the 12v input side of the brake light switch (at the back of the pedal box in the engine bay).
The other brown wire goes to one side of the clutch switch. Other side of the clutch switch is connected to the "output" side of the brake light switch.

I don't have them fitted, but apparently LED brake lights need a resistor added to make things work properly. There's a tech bulletin on the Command website about it.

I'll post up some photos later.

Steve

Some photos

Propshaft speed sensor and magnets


Command module


Electronic module


Vacuum actuator is the blue device tucked under the drivers guard. it has a cable coming out of it to pull on the throttle arm


Steve