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Both front position lamps have parasitic draw

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JexVaria
Posts: 3
Joined: 17 Mar 2015, 01:41
Year and Model: 2012 XC90
Location: Knoxville, TN

Post by JexVaria »

So awhile back I swapped the two front center position lamps with LED bulbs and they worked fine for about a week. I then noticed that the LEDs were constantly on (but very dim) with the ignition off and key out. So I swapped back to traditional bulbs, but they won't light up and I get the Position Lamp warning. When I swapped back to traditional bulbs is when I noticed the outer position lamps as well, which have been burnt out probably since I've gotten the vehicle. I finally have gotten tired of running around with the warning message and did some investigating tonight. There is a constant power to the position lamps but very low voltage, my lead test light is very dim when I touch it. I will test it with my multimeter as soon as I find it and put on here the readings, but does anyone have an idea were the short could possibly be, or where would be a likely area? I've already pulled out both headlamps and checked that the short is behind the assembly. Fuse is fine (#20 engine compartment, 15a)

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SuperHerman
Posts: 1798
Joined: 01 Dec 2014, 13:28
Year and Model: 2004 & 2016 XC90
Location: Minnesota
Been thanked: 207 times

Post by SuperHerman »

Use your VOM and do a short to ground check on the wires. Pull the fuse and do the same. Check the harness connection itself, remove the wires from the plastic. Then move up the harness and see if you can find an end point to check. Sounds like you are heading in the right direction.

You have to isolate the circuit by pulling the fuse. Wouldn't hurt to even check at the fuse box as it could be a pre-box short.

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