Terra preheating lamp stays on

Sounds familiar! Had a similar headache with my old Peugeot 308. Same symptoms, turned out to be a dodgy connection somewhere in the vehicle heater circuit. Start by checking the cable and plug connections going to the preheating control unit. Even a slightly loose or corroded connector can cause all sorts of electrical mayhem. Do you know where the heating module is located on your car model?

Cheers for the tip! A dodgy connection, eh? Yeah, I'm not entirely sure where the control unit hides on the Terra. Any hints on where to look? Is it somewhere near the engine, or more towards the firewall maybe?

Confirming my suspicion. Yeah, it's usually tucked away somewhere near the engine, often close to the glow plugs or on the firewall. If you're not comfortable poking around, I'd suggest taking it to a workshop. They'll have the right tools and diagnostic equipment to pinpoint the exact problem. It cost me 95€ to fix, so it shouldn't break the bank.

Thanks a bunch for the help! You nailed it - took it to a mechanic, and it was indeed a corroded connector on the preheating control unit. 95€ later, all sorted! No more smoke, no more lights, just sweet, sweet diesel power!