Thread: What part is this plug?

I know it’s 4 years later but thought id share my results incase anyone else runs into a similar issue! It was indeed the relays under the drivers seat. Gave them a wiggle and the engine would cut out. Had them all re-soldered, job done.
Note to self: always check relays before shelling out $$$ replacing parts

Originally Posted by shack

I'd be having a good look at the relays under the driver's seat, poor contacts on these can cause all the problems you listed,
I.e glow plugs, starter motor, fuel pump etc.....I'd be checking these first on a defender, they are a known issue, especially if you like wading.

Big thank you for the tip Shack