If your 2003 Volvo S40 passenger side headlight isn't receiving 12 volts, it could be due to a blown fuse, a faulty headlight relay, or a bad ground connection. Inspect the fuse box for any blown fuses related to the headlights and test the relay for proper function. Additionally, check the wiring harness and connectors for damage or corrosion. If all components appear intact, further diagnostic testing may be needed to trace the electrical issue.
12 volts...max 13.8 volts
12-14 volts
Check your regulator. It controls voltage to the headlight. If it is defective you will get way more than 6 volts to the headlight above 3000 rpm.
12 volts DC.
It can either be a blown Bulb. Or it could be bad or corroded connectors.
Yes, but not more than 13 - 15 volts, or the headlight filament will burn out.
One way in achieving this can be getting a 140 watt solar system. The reason behind this is they take both 12 volts and 24 volts.
check the voltage at the horn and see if its getting 12 volts. If it is getting 12 volts then the horn is no good. If its not getting 12 volts then the wire from the horn needs to be traced back to see if there's a break some where in the positive wire. try checking to see if the horn button on the steering wheel is working properly.
lol. 12v in, only 6 out. looks like your switch is eating 6 volts. Get that out of there. then the other volt drops should come into check. You should only have a .5v total volt drop in the whole circuit; after that problems start to pop up.
i think you should try a new alternator buddy. u shold be getting 14+ volts maybe that will work :)
Use a step-up transformer from 110 volts to 220 volts. Try getting one at Home Depot or SEARS.
You should be getting 14 volts from the alternator.