Hi robertblake, Welcome to 2carpros and TY for the donation
In the Cargo Compartment Relay/Fuse Box
Try unplugging these relays 4, 6, 13 R/F box and see if the lite will turn off, the relay that shuts it off could be sticking- see below
August, 23, 2010 AT 2:03 PM
Volvo was 2002, not 2003. None of the relays effected problem. Pulled all relays and still problem. Rear window gets hot when de-ice button pushed. No wire broken or frayed from visual inspection. Looks like dealer may have worked on problem as relays have been pulled before. One relay a different color so I believe it was replaced, but no response when pulled, Still registered as open talegate. Could relay be bad and only registered closed when it is working?
August, 23, 2010 AT 4:42 PM
You have a sophisticated electrical system its hard to say where this problem exist, the relay can be tested-by checking the coil and switch side. Your best bet is bring it in and have it checked by their ace electrician