• Jun 22, 2026 Custom Auto Wiring Electrical Hp1545 Oem Electrical Systems Premade Custom Wiring Kits Car Audio Installations For Street Rods Muscle Cars Race Cars Trucks Restorations cuits 5 Grounding Ensure solid grounding points are used Grounding directly to the chassis is often preferred Clean the grounding surfaces thoroughly before making connections 6 Testing Before reconnecting the battery thoroughly test all circuits and components Use a multimeter to verify voltage BY Alex Franecki