Glow Plugs out on my '82 300SD, suddenly. Checked the 80 amp strip fuse in
the glow plug relay and it's fine. All glow plugs the same resistance with
the 5 wire plug disconnected. Power is good to the relay on the large wire
and good on the smaller connector from the ignition. I opened up the relay
and it looks fine, nothing burned and the points were clean.
Does this sound like the relay itself is bad? Is there any way to check