One of the common inquiries we get from customers is how to get better electrical performance from their positive ground vehicle. Aside from buying a new wiring harness there is a simple $10 investment that can breathe new life into your vintage positively grounded vehicle

Positive ground systems have a lot more problems with corrosion at the grounding points than negative ground systems. The reason for this is because electrons actually move from negative to positive. In a positive ground system this means that the electricity is flowing from the softer metal (copper) to a harder metal (steel). This causes quite a bit of electrolysis and quickly degrades the connection.

The solution to this is a simple can of battery no-corrode spray available through YnZ’s or at your local parts store usually for around $10. If you are installing a new wire harness simply spray a little on any place the wire connects to ground. If you are trying to work with old wiring make sure to clean any ground connections thoroughly first. It may also be useful to clean and spray any points where ground is critical like bolts that connect light housings to the body or where the instrument cluster connects to the dash.

The last positive ground vehicle that I restored was my 1954 Bentley. I used this method religiously and while I do not currently own the vehicle I did not have a single electrical problem in 20 years. Apparently this chemical wards off the prince of darkness as well as corrosion.