How to Test a Mercedes Glow Plug Relay?

Answer Glow plugs heat the cylinders in diesel engines to help start them. The glow plug relay uses a small amount of electrical current to close contacts to supply higher current to the plugs. If you sus... Read More »

Top Q&A For: How to Test a Mercedes Glow Plug Relay

How to Test a 7.3 Glow Plug Relay?

Glow plugs are an important component in the Ford 7.3 liter Powerstroke diesel engine. The glow plug, along with the glow plug relay and temperature control devices, heat the cylinder so proper com... Read More »

How to Test a 1993 Ford Diesel Glow Plug Relay Controller?

The 1993 Ford diesel vehicles were equipped with a 7.3-liter 8-cylinder engine. Diesel engines run differently than regular combustion engines. Instead of spark plugs, diesel engines use glow plugs... Read More »

How to Tell If a Mercedes Glow Plug is Bad?

Mercedes diesel engines use glow plugs instead of spark plugs to start the combustion process. An electrical current is sen into the glow plug, where resistance causes the glow plug to heat. The he... Read More »

How to Change a Glow Plug on a Mercedes 300SD?

A diesel engine relies on the compression of fuel and air during the combustion cycle. Combustion efficiency is reduced when a diesel engine is cold, so glow plugs heat the engine block and cylinde... Read More »