Howdy,

I'm trying to diagnose a problem with the glow plugs on my folk's 12/84 300D-T. Symptoms are no glow plug lamp and hard starting.

I've read the procedures in the archives for testing the glow plugs but I'm totally clueless as to where some of the components are located, specifically:

Glow plug relay

Glow plug harness connector (the one that is disconnected to measure resistance of the glow plugs)

80A Fuse


The process seems pretty straightforward, but I gotta know where to start

I plan to start with the resistance check then check for voltage at each glow plug connector. Sound reasonable?

Thank you!

Jim