GPCM Test

[tom135]

Hi all,

I was wondering if there is a way to test the GPCM to make sure it is working properly. I'm having clod starting problems, I'm changing my glow plugs and glow plug harnesses on spec.

Thanks for any help

[dannyboy950]

Well if ya have a Ford IDS ya can cycle it and see if it responds.

The hard way is to from a cold engine check each of the wires going to the plugs them selves for voltage and duration of voltage. This is a long process as ya have to wait several minutes between testing each circuit for cool down and timer reset. To do it right anyhow.