Quote:
Originally Posted by
bikemad195
the way i currently see it i would have to break this trigger cable and run it in one side of the relay and back out the other therefore relying on the relays components giving it a weak spot if the relay decided to be a ***** ?and creating a break in the original circuit
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You must
not split the original circuit and feed the whole thing through the relay - this will be a recipe for disaster!
You take a +12V feed to trigger the relay off the side light circuit (a spur or "T") by "tapping" into it and connecting this spur to one of the trigger/switching terminals on the relay. You can use a Scotchlok to this, or strip back the insulation and solder on the spur. The opposite trigger/switch terminal on the relay must be connected directly to ground (earth) with another wire. The
only connection between side light circuit and relay should be the incoming +12V feed.
The load circuit (for the accessories) can then be passed from battery (via a fuse) throught the load termainals on the relay (in one, out the other) to the accessory, and then from the accessory to earth.
Below is a wiring diagram. Ignore the fact that the load circuit is lights (could be any accessory). Note the only connection with the existing loom on the back is the
single feed from the side light circuit.
Most good relays only draw a miniscule current of about 3-5mA to trigger the relay, so if wired correctly it will never harm the original circuit the spur is taken from.