OK, Had a beautiful day yesterday. I tested each glow plug right after turning the switch on. Each one was getting 12 V.
I then tested with an ohm meter between the engine, and the electrical connector with the wire on it, and most of them were '0', one or two were .1
Was it necessary to unplug the other end of those wires first? I didn't, because it was on there pretty good, and I was leery about breaking anything. Does it just pull straight away?
It is very clean in there, so there is not a corrosion problem, and the fuse was nice and shiny, and tight. Car still wouldn't start.
Sid, near Niagara Falls
--- In diesel_mercedes@yahoogroups.com, Bogy Wan Kenobi wrote:
>
> If the dash light didn't come on you should suspect that at least two plugs are dead. And maybe three. There is a relay and control box under the hood on the left inner fender well near the left headlight - about 12 inches back from the headlight. It should b3 under a plastic form fitted cover. It has two plugs - one with smaller-ish wires and one with 5 larger-ish ones. The plug with the 5 larger wires is the feed for the glow plugs themselves. You will need to unplug that plug to test the glow plugs individually. Their resistance is near zero ohms to begin with so an ohm meter will only help detect an open plug. A shorted plug will likely blow the big fuse at the "rear" end of the relay. The best way to test them is with a DC ammeter under power. Each working plug should pull between 8 and 12 amps. A wire from the battery through an ammeter and to each plug, one at a time, is the best way to find a bad glow plug. But be sure to disconnect the feed plug
> first.
>
> bogy.
>
>
>
> --- On Thu, 2/7/13, bmwsid wrote:
>
> > From: bmwsid
> > Subject: [diesel_mercedes] glow plug problem
> > To: diesel_mercedes@yahoogroups.com
> > Date: Thursday, February 7, 2013, 12:39 AM
> > I tried to start my '85
> > TD yesterday. I saw the indicator on the dash
> > did not light up, and it wouldn't start. Obviously,
> > the glow plugs didn't heat up, either. Is there a
> > relay that needs to be looked at, and where would it
> > be? The voltage in the battery is OK so it is not the
> > problem.
> > Sid, near Niagara
> > Falls.
> >
> >
> >
> > ------------------------------------
> >
> > Yahoo! Groups Links
> >
> >
> > diesel_mercedes-fullfeatured@yahoogroups.com
> >
> >
>
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