If I had a bad glow plug relay, wouldn't the starter still engage and the engine turn over? I've it it before in those rare real cold days in South Texas where it wouldn't crank after one glow plug cycle, but did after 2. The car will not even attempt to engage the starter, no matter how long the I wait before turning it to the start position. I don't think the car is that thin skinned, as a matter of fact it gloats when it has to do the work designed for another.

Wayne