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In order to get better light, and not least to prevent the light switch melting,
it may be a good idea to connect the main lamps via relays.
• NOTE! If the light switch starts getting hot, you need to install the relays FAST!!!
• Use two relay for each lamp; that way you will only lose one low/high beams if a relay fails.
• The wire from the battery must be minimum 2.5, but preferably 4 square millimeters.
The distance from the battery to the fuses should be as short as possible.
• Use shielded lugs and acid-free grease on all contacts, and be sure to get good contact with ground.
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This form is for one lamp.
NOTE! When you are connecting the relays you must follow the circuit diagrams
on the relays.
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Error
It is a very black night, and your speed is 80-90 km/h.
What happens then if you suddenly get an error with the lights on the car?
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1. With original layouts
- The switch goes hot and stops working: it will be BLACK!
2. With 2 relays and 1 fuse for both lamps
- The fuse fails: you lose high and low beam both sides: it will be BLACK!
- A relay fails: you lose high or low beam both sides.
3. With 2 relays and 1 fuse for each lamp
- A fuse fails: you lose high and low beam on one side.
- A relay fails: you lose high or low beam on one side.
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• In order to relieve the light switch, perhaps it will be enough to mount relays on one lamp only.
— Install relays on one lamp, start the car
and wait a few minutes. Then measure the voltage loss on both lamps. If there is little difference, this may be sufficient.
But if there is a big difference, then you must install relays on both lamps.
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