6.4 High Idle Wiring

[wp6529]

You need both. You need the connection to the PTO enable / request line to enable the SEIC mode, and you need the resistor to set the desired idle RPM if you want something other than the 1,200 RPM default.

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[dc4]

Originally Posted by wp6529

You need both. You need the connection to the PTO enable / request line to enable the SEIC mode, and you need the resistor to set the desired idle RPM if you want something other than the 1,200 RPM default.

[IMG]file:///C:/Users/ts01729/AppData/Local/Temp/moz-screenshot.jpg[/IMG]

I was able to get a diff potentiometer(this one had 3 poles). After installing it I realized that I didnt use the Gray/violet PTO_GND but it still worked i was ablle to to adjust my rpms. After pulling my dash apart again I tried putting the gray/violet wire on the only pole availible on my potentiometer, well something happened and my rpms shot up to 1800 i dont know if i let one wire touch the other or what. I was doing this while the truck was running. Even taking the parking brake off didnt lower the rpms. turning the engine off for a few min did the trick. Then I realized that there wasnt any leads on the potentiometer labeled as a ground. Is this something that needs to be grounded. It worked fine without the Gray/violet wire hooked up i just dont want to screw anything up by not using it if i have to.

[wp6529]

It will work without one leg of the pot grounded, for the same reason it will work with just a fixed resistor, there is a pull down resistor in the PCM which completes the voltage divider. It won't hurt anything. I would expect the PCM inputs to have protection from shorts to ground or power, but I'd be careful to keep things properly insulated so they don't short and do funky things while you're driving.