wait to start light

[no mufflers]

truck in sig, the wait to start light stopped working a few days ago. the glow plugs still work and cycle properly. I bench tested the light and it will light up with a ground and 12 volts. I am getting 12 volts to the plug on the truck but it seems I have lost the ground connection. does anyone know where the ground wire routs to in the harness? everything else in the truck seems to work so I don't think a major ground went. I would like to fix this properly and not just wire in another ground to the light, but if that's my only option then so be.

thanks

 

[DaveBen]

They are screwed into a metal part of the dash, behind the instrument panel. Crawl under there and look.

 

[dgr]

Do you mean you are getting 12V to the socket for the bulb? If not, that is the next step I would do.

If you look at a wiring diagram, you should have 3 fusible links on the load side of the relay. 2 for the glow plugs and a smaller one for the light

 

[chris142]

There is a plug on the passenger side fender that everything goes through. That was my problem

 

[no mufflers]

IL check all of those things out, thanks. it seems to be an intermittent problem. it didn't work yesterday but came on this morning. I stripped some casing off the ground wire and attached a small wire to another ground and it made it work so there is just a finicky ground somewhere.

 

[Runningaford]

Mine's intermittent as well; sometimes it'll be spot on, others not so much. All of the wiring is old, and as long as it works, I'm fine with it. I do carry a fire extinguisher, and I think it's a must for any older rig. Other than that, I just watch the idiot voltage gauge; it's spot on every time; the gauge shows the draw of the plugs, and you can visibly see it move around an 1/8" when the plugs cut off.

 

[no mufflers]

instead of starting a new thread il start on this one again. the question I have is, is it ok to let the GPs cycle until the relay clicks or should I go by the light on the dash? in my case when the GP light turns off the GP relay is still activated so im not sure if I should leave them on longer then the light or if it cause premature failure.