Light control module

Check grounds first. Try putting a jumper cable connecting battery ground to a ground lug on the front of the firewall.
The electrical system goes totally nuts in these trucks when they lose good ground..

 

sounds like you cooked the LCM..... you can change it BUT you will still need to take it to Volvo to have it programed for YOUR truck or it wouldn't work. I would go to Volvo and have it checked 1st and because they will need to program the new one IN THE TRUCK I would just have them do all of it

if it is bad think about a few things BEFORE you have it programed, what lights do you want it to tell you are out (this can be changed) do you want to change some of the lights to LED....? do you have fog or driving lights.....? do you want to add them....? if you have 1 do you want to add the other...? each change the LCM will need to be reprogramed (extra cost) BUT if you need to have the LCM changed have all the changes done at that time, it will cost the same (no extra)

 

remove the batteries for starters let them sit form about 30 min and then reconnect usually light control has a brain fart. if not you're lcm is cooked it's located under the fuse box and you have to pay some good money for that thing unless you can get it from junk yard

 

If you need one check eBay. There are a cpl used ones on there for less than $250

 

OP, any updates on findings?

 

I believe your problem regarding headlights would have been solved. So can you tell me what's the dealer did because I got the same problem. Headlights stay on while I turned off my truck.
Thanks

 

Same problem here... any replys??

 

Please help