No power to lambdas

[TaimarTurbo]

Two weeks ago the engine started to run rough, misfiring and smelling of petrol.
Thankfully it was only a mile from home.
Got a cable to check for error codes on the CUX14, but none there.
I did notice that the short trim on both banks go to +100% quite quickly.

After checking the AFM, throttle pot, ignition leads, plugs, etc. I found out that both lambdas are not getting power on the heater circuit. (measured between the red and white wires from the lambda sensor)
Then I checked for power at the puel pump relay on the white-orange wire, which it did.

So do the lambdas get their power straight from the white-orange wire or is there another relay stuck in somewhere?
If not can I bypas the original wire going to the lambda heater?

[blitzracing]

You can download the 14CUX wiring manual here, although TVR might have done some tweeks. Certainly on the stock set up there is only one relay involved- it has two pins that go live together- one goes to the pump- the other to the heaters. Of course if someone has been messing around with the relays and fitted the more common two way switching relay you will loose the heaters-

http://www.g33.co.uk/images/PDFS/14cux_fuel_inject...

[TaimarTurbo]

Thanks for the response BlitzRacing,

I'll check the relay this weekend.
After a quick search I found the relay numbers in this thread http://www.pistonheads.com/gassing/topic.asp?h=0&a...
Bosch part number 0332014112

Looking at the diagram, the fuel pump is getting power through the white/purple wire and the lammbda sensors through the white/orange wire.
Which is the wire I checked for power. I think it's safe to assume there is a break somewhere between the relay and the lambda sensors.

I'll see if I can find it, if not I'll run another wire to the sensors.