code 380 glow plug heater ckt A malfunction

[stevesnider]

I replaced my GPR and cleaned batteries last night . Had codes checked today it said p380 GP heater ckt A malfunction.
What is the ckt A ?
Steve

[More Power]

P0380 Glow Plug Circuit Performance

Conditions:

1- The PCM has commanded the glow plugs ON and the voltage at the glow plugs is less than 4.0 volts.

2- The PCM has commanded the glow plugs OFF and the voltage at the plugs is greater than 4.0 volts.

3- The PCM commanded the glow plugs ON and there is more than a 2 volt difference between the glow plug voltage and the ignition voltage.

You may have a loose connection or an open fusible link in the glow supply or glow plug circuits.

Chapter 14 of the online Troubleshooting Guide may provide additional insight.

http://www.thedieselpage.com/members/guide.htm

MP