The relay might be locked in. Once the engine is running you could co
nmfirm this by checking for voltqge to ground from one of the glow plugs. The other thing to check is to see if the current feeding the glow plug relay shuts off once the car is running. In that case it may be the ignition switch.
On Wed, Dec 11, 2013 at 11:51 PM, <barton.fiske@gmail.com> wrote:
It has gotten cold enough here in northwest metro MA that Silvia is starting to act up again....lately, the glow plug light refuses to go out....and me thinks this means they're glowing while the engine's running and draining the battery at the same time. Putting a voltmeter on the battery when the engine is off - it's 12.0V. Start the car and it's closer to 11.5V @ 1500 RPM with the glow plug light on while engine is running.....when the light finally decides to go out, voltage goes to about 13.3V at idle and 13.8 @ 1500 RPM.
I found this post below from someone who found corrosion in the pre-glow fuse box / relay. It's cold enough that I only had time/will to remove the cover, look for cracks in the fuse (none I could see) and re-seat the connectors to the glow plugs. No help. Anyone else tried what's described here (w/ success?). Anything else to try or diagnose?Car starts, runs and drives fine (probably needs a vacuum pump) otherwise - I fear I'm ruining what are relatively new glow plugs....and the battery as it's probably not getting charged as much as it is being drained.thx,-Barton
Al Boucher
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