Help. 2019 Defender HD10 XT Has no power to head lights, winch, and dash.

[LarryB]

Drove my Defender for 2 minutes up to the house.  Turned it off.  Went to start it 10 minutes later and there was no activity when I turned the key.  Dash did not respond, headlights will not turn on, winch is dead.  All fuses seem to be good.What do I need to do?

[Andystoy19]

My guess is that you have a loose connection to the battery, probably a corroded ground wire. If you have a volt meter check your battery first for 12.6+ volts first and if good start checking the cables and ground wires.🙂

[LarryB]

47 minutes ago, Andystoy19 said:

My guess is that you have a loose connection to the battery, probably a corroded ground wire. If you have a volt meter check your battery first for 12.6+ volts first and if good start checking the cables and ground wires.🙂

My rooftop light is working just fine so I don't believe the battery is the problem.

[LarryB]

Anyone have an idea?  I'm thinking that it might be one of the relays but no idea which one to check or how to check.