Nitrogeno25
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| posted on 19/8/05 at 12:20 AM |
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Wiring and relays
Hi, I'm building my wiring loom and have some questions about where to use relays:
I saw the schematic in Ron's book and it doesn't show a relay for front lights.
Many other schematics (Other cars) use relays.
About the engine start button, I have one, but not knowing the amp rating, should I use one? Why normal car switches does not requiere or use a relay
to drive the started solenoid?
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nick205
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| posted on 19/8/05 at 06:44 AM |
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It depends on the rating of the switches and wires you are using.
The purpose of a relay is to switch heavy currents - say 30A for a cooling fan, using a light duty switch and wiring.
I have used relays for headlights, main beam, horn and cooling fan as the Sierra column switches I have used are not designed to cope with high
currents.
If unsure then I would say use a relay rather then not - they only cost ~£2 each anyway.
HTH
Nick
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chrisf
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| posted on 19/8/05 at 12:58 PM |
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I may have gone a bit overboard, but I used relays on my ignition, horn, fan and dip lights. My bike loom also has a starter relay. So when I turn my
key, the ignition relay sends power to the ignition side fuse block. When I press the start button, the starter relay fires.
I didn't use a relay on my headlights because I have them hard wired to the ignition side fuse block. This gives me daytime running lights.I
haven't taken pictures in a few days, but you can get an idea here.
--HTH, Chris
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