Here is another solution to the problem. I had 17V at the battery and replaced many light bulbs multiple times until I resolved the problem. It was related to the relay next to the R/R. I did not have any connectivity from the battery to the monitor wire harness at all. So I opened up the relay housing and found out that the relay was stuck open due to rust. I cleaned it up and it worked fine after that but eventually I should replace it. That relay connects the monitor wire to the battery. Here are some pics of the relay.
6th Gen Monitor Wire Fix.
in Modifications
Posted
Here is another solution to the problem. I had 17V at the battery and replaced many light bulbs multiple times until I resolved the problem. It was related to the relay next to the R/R. I did not have any connectivity from the battery to the monitor wire harness at all. So I opened up the relay housing and found out that the relay was stuck open due to rust. I cleaned it up and it worked fine after that but eventually I should replace it. That relay connects the monitor wire to the battery. Here are some pics of the relay.