Having problems with your Vauxhall Cars & Trucks ?
How to fit a 2nd reversing light to my Vauxhall astra
Using the original wiring and a new live wire. this can be used on the tow wiring loom located under the boot cover at the bottom. and a relay. wire the the new light up and place the earth wire on a good earthing point.use a wire from the reversing wire and connect to the relay switching side of the relay and use the live wire from loom for tow wire. also place a fuse on this wire 10amp will be fine. if you are using the 2nd reversing lights for a caravan etc don't use this live wire use a new wire. most wiring looms have a wire on to loom for reversing light. so check that first. it can handle 2 new lights at a maximum of 10w which is adequate for the new lights. as you have not said what year astra it is both of these should work fine. there is also a main live in the pass side rear side compartment used for electrical extras cd player etc there will be a plug with nothing connected to it. it is ignition control 25amp rating. so a 10amp fuse will be fine on this line.
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