location: Test / Inspection & Well-packed before US shipping Type:Relay Solenoid Air Inake Heater Grid The cummins diesel 5.9L 12 valve and 24 valve diesel engines do not use glow plugs during the cold startup process. This cummins diesel engine is equipped with a relay that is used to activate the heater grid which is located directly between the air horn and intake manifold. The heater grid heats the incoming air during startup to ensure a quick start in cold weather. How could you know that you need to replace your Dodge 5.9L Cummins Diesel Air Intake Heater Relay? Here are some symptoms and warnings: Longer crank times in cold weather More frequent crank periods before the engine fires Increased white smoke during cold starts A hard to start condition is present during cold weather Manufacturer Part Number: 68188401AA , 904-308 Interchange Part Number: 56026842, 3924594, 3969987 , 904308 The replacement of the Intake Heater Relay or Bracket on the 1998.5 to 2002 Dodge Cummins powered trucks requires only one 68188401AA relay The Replacement 68188401AA relay succeeds the following part numbers: It replaces Chrysler # 68188401AA , 904-308 56026842 Cummins 3924594 Cummins 396998 For Dodge 5.9L Cummins Diesel Air Intake Heater Relay For 1994-2002 Dodge Ram 2500 With Diesel Engine For 1994-2002 Dodge Ram 3500 With Diesel Engine Professional Installation is Highly Recommended (Please refer to compatibility chart for details)