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Corsa Sport » Message Board » Help Zone, Modification and ICE Advice » C20LET Into a 1.0 12V Corsa B (Have you ever seen this?) » Post Reply

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C2VXL	posted on 21st Nov 13 at 09:35
	It is mate. I found the fuel pump relay in the main fuse box. It's a X plate 1.0 12v so wondering if it's anything to do with being one of the last made.
Aidan-Fleming	posted on 21st Nov 13 at 08:36
	Weird! That's a 1.0 12v
davegreen	posted on 20th Nov 13 at 22:42
	quote: Originally posted by C2VXL So Dave did you just completely bypass the Corsa fuel pump relay and just used the LET relay? no just swaped the earth and live wires so it wored from the output from the new engines ecu. running stand alone ecu now so just the corsa's relay which is where yours is along with 3 others, one was the cooling fan one doesn't seem to do anything? and cant remember what the last one did?
C2VXL	posted on 20th Nov 13 at 10:46
	Aidan - that relay has different wiring to mine. You have the two blue/red wires that need bridging. My wires are black/brown and red.
Aidan-Fleming	posted on 20th Nov 13 at 10:21
	This is what I did.
C2VXL	posted on 19th Nov 13 at 21:03
	I'm assuming it's the fuel ump relay that i'm looking at??
C2VXL	posted on 19th Nov 13 at 21:01
	In fact my fuel pump relay doesn't even have a small blue/red wire. The switch wires are coloured red and black/brown.
C2VXL	posted on 19th Nov 13 at 20:58
	So Dave did you just completely bypass the Corsa fuel pump relay and just used the LET relay?
davegreen	posted on 19th Nov 13 at 20:55
	I had the same on my corsa b. found that the pump relay was live switched (small blue/red wire) where as the ecu for the new engine was earth switched (small brown/red wire) as a rule on Vauxhalls brown wires are earth, red trace is earth switched. blue wires with a red trace are ecu live switched and black wires with a trace are switched by ignition or another switch after ignition.
C2VXL	posted on 19th Nov 13 at 20:54
	It states on the tutorial that it's the other relay that I need to bypass. I only have the one purple relay. Do I just bypass this one?
Mr-SEH	posted on 19th Nov 13 at 20:45
	I had this issue with my old 1.0 in the end I ran a wire from fuel pump to engine loom with a inline fuse just in case never popped mind, but it wored faultless for over 2 years
C2VXL	posted on 19th Nov 13 at 19:38
	Hi All, Really hoping someone can help me here. I'm trying to wire up my C20LET engine into a 1.0 12v Corsa B as per the tutorials online, however my wiring and relays appear to be different. My wiring loom wires are :- Red/Blue Thin Red/Blue Thin Red/Blue Slightly Thicker Brown/Red Green Red Black/Brown Blue/Brown Brown/White Black (have left this in the engine bay) The tutorial pictures show two purple relays in behind the glovebox, mine has one purple relay and one blue relay. The wires to each are as :- Purple Relay (Fuel Pump Relay I think) 90565944 Red/Blue (Thick) Red (Thick) Black/Brown (Thin) Red (Thin) Blue Relay (Googled relay number, it appears to be for the fog light??) 0332019452 2x Black/Blue 1x Black/Blue 1x Brown 2x Grey/Yellow 1x Grey Yellow If someone can point in the right direction or even better tell me what to do I would really appreciate it. I have searched and searched but all links seem to be to the same tutorials. Cheers guys.