07-30-2013, 08:50 AM
Join Date: Jun 2012
Location: San Mateo, Rizal,Philippines
acu cooler knob re-activation (original set)
INFO TO THOSE WHO INSTALLED ACU ON CARRY PICKUPS F6A USING ITS ORIG PARTS AND WIRINGS:
The cooler sliding knob at ACU panel (Blue-red strip, Blue for cool (left) and Red for hot (right) could be activated if you can get the original wired switch for it... Its only a very small kit with three wires, one red-white and 2 blue...
The function of it is to control the trigger of the thermostat like new cars... Meaning, a timer control for the compressor depending if the cooling level already reached when set....
Those ac installers have shorted the linewires (2-light blue) going to this switch, so you will notice, your compressor always run all the time and did not come off even the cold level already reached, adding much strain to the engine when the ACU is activated....
Im curious before on what's the use of the small socket in the ACU wire harness and in view of it, i ask my friend importer where he told me that it is connected to said knob....My ACU control panel dont have that switch and I just got it (a very small kit) for free from my friend importer/assembler where i bought my units... I just have it installed yesterday... NO new wiring needed.. I just plug it to where it should be connected to the harness, the small male-terminal socket wired 2-blues..
For info, my ACU wire harness going to ACU control box, compressor, and condenser fan are all original with no cut joints for add-ons, so sockets and condenser-fan relay are still complete...The entire system Works perfect as original.... When the slide knob is set to any mark in cooling position, the compressor triggers off when the corresponding cooling temperature is reached, and vice versa...
I will post the picture of said kit after i will remove the dashboard this saturday for some fixings to my underdash harnesses.....
My next program to discover and activate/install on the ACU system is the second thermo-control sensor on the engine where its function, as my friend told me, is to cut off the compressor once the engine overheats when ACU is ON (an engine protection)....My wire harness has two thermo-sensor wires and two idle-up lines...Usual F6 engines, particularly for those trucks with heaters but no aircon has one thermo-sensor installed with the other outlet just plugged with bolt... Im told that the carry-truck with a factory installed ACU has two sensors already so Im waiting at this time for the item to be available once their imports arrived in their yard...
Hope this info will help to those who want to have the system restored to original... just give much patience and time as removal of the wirings , tapes, instrument meter cluster, and dashboard is required... for info, the acu harness of this baby is a separate system to the other wirelines.... so other wire system is not affected once you remove the acu harness..
THE ABOVE IS A DIY....
Last edited by redhawk; 07-30-2013 at 11:05 AM.