hummwv glow plug start time

[cq141]

it takes 12 to 15 sec for the the light to go out before starting is this normal for a hummwv the m2 bradley I used to drive started instantly from what I remember so did the 113 and the abrams never drove the hemmetts always wanted to though they looked cool

 

[Lawdog734]

Both of my "WAIT" lights stay on for 10-12 seconds before they cycle off, so that sounds about right.

 

[86humv]

If they just flash....then you got issues.

 

[papakb]

This is a topic that has several answers because the WAIT light behaves differently depending on which Protective Control Box is installed in your truck. The original Prestolite boxes turned the glow plugs on for about 11 seconds and would cycle them until the engine started. You could observe the voltmeter cycling when they were on and this would continue for about 30 seconds after start. This was called "afterglow" and was completely normal. As the PCBs changed through Nartron, KDS, SSI, and up to the latest S3 boxes the light behaved differently. You will also not hear the glow plug contactor cycling (big clunk under the dash) or see the voltmeter fluctuate. There are some very good write ups on starting issues here and on the G503 HMMWV forums.

Kurt

 

[KansasBobcat]

My light stays on longer with latest PCB than the old Prestiolite box. I think at least 10 seconds...

 

[TedG]

Low batteries can increase the time the light stays on.