glow plug relay problem

[hjwolfe]

I have a F350 7.3L diesel and had problems with starting when temp is below 40 degrees. I checked relay and I could feel and hear it click in. No voltage on gp side. Replaced relay and truck started fine. I monitored the voltage on gp side and it stayed on after the engine was running. I checked it for about 15 seconds. How long should the relay stay on?

[CHUCK]

the GPs will stay on up to 20-30 seconds IIRC.

[SButler83]

I thought it was up to 120 seconds?

[frttrain]

It is up to 120 seconds and air heater can stay on for up to 30 min..

[Stroken7.3]

Originally Posted by SButler83

I thought it was up to 120 seconds?

^^What he said^^ Up to 2 minutes.