I'm not good with wiring/volts etc. I'm trying to install a Timbo APPS and I can't seem to get things right. My battery tester works, but only has a range of 4v-19v (first picture) so it's out of range for the APPS. I just bought a another voltmeter and I can't even get it to read the battery volts...do I have things plugged in the right areas? According to the directions I should hvae the leads in the right areas and setting at 200 or 500 for the battery and I'm still getting nothing!

It looks like the meter is on 10A. Turn it to DCV 20 and try again.

I'm an idiot, I didn't take the rubber boots off. Batteries are reading fine. Now, I can't get the reading on the APPS and I have a code saying low APPS voltage. 

Double check your code number to these... A lot of generic code readers don't display the proper definition of error code.

 

http://articles.mopar1973man.com/2nd-generation-24v-dodge-cummins/59-obdii-error-codes/150-p0121-apps-sensor-volts-do-not-agree-idle-validation-signal

 

http://articles.mopar1973man.com/2nd-generation-24v-dodge-cummins/59-obdii-error-codes/151-p0122-apps-sensor-signal-voltage-too-low

 

http://articles.mopar1973man.com/2nd-generation-24v-dodge-cummins/59-obdii-error-codes/152-p0123-apps-sensor-signal-voltage-too-high

P0122. APPS is reading .2, it should be reading .580 to .7...and I just stripped out the idle stop screw...any suggestions on getting that head out, T20 torx?

Just swapped out the Timbo APPS for my original and it's reading .570. Is it safe to say I have a defective Timbo APPS?

P0122. APPS is reading .2, it should be reading .580 to .7...and I just stripped out the idle stop screw...any suggestions on getting that head out, T20 torx?

 

No. You want to read this...

http://articles.mopar1973man.com/2nd-generation-24v-dodge-cummins/26-engine-systems/37-apps-sensor-voltage-adjustment

 

Just swapped out the Timbo APPS for my original and it's reading .570. Is it safe to say I have a defective Timbo APPS?

 

Timbo's APPS doesn't have a set voltage since its all mechanical switch now.

 

As from the link above the OE APPS is design to sense a voltage toggle from idle to throttling. When in idle mode the voltage is not used any more only the ECM software is used to set idle so as long as a OE APPS is BELOW the tag voltage your golden.

The back of my oem APPS says .487, voltmeter reads .57, so I need to turn the idle screw back to .487 or lower and then reinstall my Timbo and I'm good to go?

The back of my oem APPS says .487, voltmeter reads .57, so I need to turn the idle screw back to .487 or lower and then reinstall my Timbo and I'm good to go?

 

Timbo has no adjustment. Only the OE APPS Sensor.