1994 xjs with 130k - daily driver - often 1000k mile trips.

How are you guys solving grounding issues? I read somewhere that the issue is due to a corroded bolt and paint.

I sanded the paint off and put dielectric grease in the area, bolted it back on. I did this for the large ground attached to the engine on the drivers side. I questioning whether this is the best way to do this.

Is there a best practices in doing this? How many grounds are there?

Needless to say I am having countless issues, often in the rain, and I believe the are related to the grounds.

 

Start at one end and work your way to the other; the only way to do it is to physically unscrew the ground and clean it as the corrosion affects the underside of the contact area. There are loads of earth points all over the place. Also pull apart any multi plugs and connectors and clean them up.
Don't forget the battery posts.

 

Dielectric grease is an insulator, not a conductor.

You would be far better off to use conductive grease as
required under the electrical code for AL/CU connections.

You can get a tube from the electrical section at Home Depot
for $4 or so.

But, only do this for major ground and power points. You cannot
pack this grease into multi-pin connectors since it is meant to
be conductive.

If you do as Steve suggests, you will have a reliable electrical
system for years to come.

 

The first this I did when I got my XJS home was disconnect battery and clean ground points, switches and
connectors. It was a lot of work but I haven't had any problems since.