What can cause headlights to stop working?
Most total headlight failures are caused by a bad component like a fuse, relay, or module. Wiring problems can also cause both headlights to stop working.
Do I need a relay for headlights?
Every so often, the question arises – should I add relays to my headlight wiring. The answer is yes! Power is conveyed from the power source (battery/alternator) to the lamps via the wires, connectors and switches. To ensure maximum power delivery, there should not be any power loss in the circuit.
Will a relay make lights brighter?
Don’t despair; there is a simple headlight mod that can make your headlights work better. Then you install relays (which will be controlled by your stock headlight switch) into those new power wires. Your headlights and high beams will both work like normal, they’ll just be significantly brighter.
Why do you need a relay for a headlight switch?
By using a relay we move the high current switching away from the headlight switch so that the switch only sees a small current – in the range of a few thousands of an amp. This solves part of the problem. You will need two relays – one for low beam and one for high beam.
How many amps do you need for a headlight relay?
If you wish to do so, you can install 15 Amp fuses in each lamp beam circuit. These fuses should be placed adjacent to the new 30 Amp fuse. Make sure the connections are clean, tight and covered with white grease. So, now you know what the problem is and how you can fix it. OK, if you really insist, more “While you are at its”.
What to do if both side of Your Headlights are not working?
Neither side works: If both headlights are dead, it’s probably not a problem with the bulbs, but it’s worth a check. The most likely scenario is that the fuse is bad. Remove the fuse for the headlights and check it. When a fuse is bad, it’s obvious because the filament will have a gap in it.
Where does the fuse go on a headlight relay?
The two headlamps are connected together, as normal, and taken to Pin 87 of the relay. Pin 85 goes to ground while Pin 30 goes to the new 30A fuse. If you wish to, a separate wire from the fuse can be used for each relay and can be colour- coded the same as the corresponding headlamp wire. This is what I did.