Freightliner century troubleshooting a/c - Cars & Trucks

not on the ground coolant
not under dash heat box ,pool of flood of coolant
leaves 1 answer, engine is eating it. ( many ways)
BAD HEAD GASKET OR CRACKS BLOCK OR HEAD./
AND MORE. LOTS OF TESTS TO FIND, IT.

Check throttling control censer

Defective head gasket.

Check your throttle position sensor. Commonly known as TPS

Better ask Freightliner.

Freightliner CENTURY CLASS 120 Hood Parts ' TPI

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Freightliner Century Class C120 BBC Fiberglass Hood Shell. Fits Models from 1997-2002 with Old.. ... Shell (Economy). Fits 2002 - 2004 Models with New.

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Active Truck Parts Hood FREIGHTLINER CENTURY CLASS 120. More Info ... HoodFREIGHTLINER CST120 CENTURY, 2002, 1FUJBBCG92LJ79765, Hood

Hi Roy:
I'd be looking for a bad connection or contact on the switch. Try bypassing the switch. If the lights stay on, the switch is faulty. You may be able to dismantle and clean the contacts, otherwise replace.
Cheerfuls!

https://www.youtube.com/watch?v=JDrQwhhLMnM

Most likely oil is going past the turbo and out the exhaust.

amp = watt / volt
amps = 600W / 12V = 50A

You are running about 600 wats

the DRL does have its own light module for this option. check the wiring to the park lamp to the instrument switch. there is a open in the circuit