How to Fix Ford RV Headlight Low Voltage (10.3V Under Load) - Complete Diagnostic Guide
Apparently replacing the headlight relay, cleaning all ground connections, and checking alternator output means nothing when my 2000 Fleetwood Southwind Ford V-10 still drops to 10.3V under headlight load. The headlights have been consistently dim despite replacing the bulbs. My multimeter readings show 12.5V at the headlight connector when disconnected, but this drops to 10.3V when the headlight is plugged in and operating.
This 2.2V drop under load seems excessive and correlates with the poor light output I'm experiencing. What causes this level of voltage drop in RV headlight circuits, and does this require immediate repair for safety reasons? …more
This 2.2V drop under load seems excessive and correlates with the poor light output I'm experiencing. What causes this level of voltage drop in RV headlight circuits, and does this require immediate repair for safety reasons? …more