how long does the truck have to be iddling before it will go to high idle? and which wires did u hook up for the high idle to be automatic
Once I stop, put the tranny in park and take my foot off of the brake pedal it will go into high idle at 1200 RPM within a few seconds of applying the parking brake. For manual tranny, must be in nuetral, parking brake set and foot off of the brake pedal, I personally would put a simple switch in line on a manual tranny so I could control it, on the automatic I seldom use the parking brake so that is MY switch. After 1200 rpm, the battery charge protection regulates engine speed based upon the degree of battery charge, up to 2400 rpm maximum. It will go back to low normal idle as soon as you put your foot on the brake pedal or disengage the parking brake or move the clutch pedal on manual trannies.
To do the mod:
Locate these 2 wires on 2005, 2006 and 2007 models only.
1).... If you don't have upfitter switches and don't need them, don't want to buy them or have already used all 4 switches if you do have them.....Under the dash near the diagnostic link connector there is a blunt cut and taped customer access wire that is white with a light blue stripe . This wire has 12v when the key is in the run position and is a 10 amp fused circuit.
2).... Above the parking brake there is a bundle of about 11 blunt cut wires reffered to as the CAC or Customer Access Circuits which are provided for truck builders to set up PTO and other functions. Locate a purple wire with a light green stripe, this is the battery charge protection circuit (be careful, there is a light green wire with a purple stripe here too that should not be fed more than 300 milli amps which is intended for an indicating lamp)
3).... Hook these 2 wires together with about 2 feet of wire and route it so it doesn't get caught in the pedals and steering.
4).... Enjoy a very inexpensive mod
