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CR420/CR66ll Lights

You have a bad solder connection,broken wire or circuit board trace between R501 and L1 or L4 to chassis ground. Or...The schematic is wrong.
 
L1 - R501 = zero Ω at one end and 120Ω at the other.
 
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Examine L4's circuit board solder connection. Examine/follow the trace back to the power supply. You have a broken connection some where along that path..
 
Clip your meters neg. test lead to L4. Use the pos. test lead to probe the circuit trace's resistance along the path.
 
May need a magnifier and a bright light. Hairline cracks in the circuit board trace are hard to see sometimes.
 
Look at the schematic. L4 is directly connected to your power supply's bridged rectifier.
 
Resistance between L4 and the neg. lead of C509 ? Resistance between C511 neg. lead and the metal chassis ? Both should be less than 1 Ω.
 
Well no trace issues that I can see.
Here is a pic.
White arrow shows L4,Red arrow L1. Yellow arrow R501
IMG_0053.JPG
 
Are or was there any glue corrosion on the top side of any of the circuit boards ?
 
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