Hi Guys, I purchased and installed a Bosch Universal Lambda sensor. I connected the Signal Wire and the Negative to the EFI unit as per the EFI wiring diagram. The EFI unit only has two wires and the Lambda sensor has four (2 extra for the heater). Can I run power to the heater from the master switch or should I run it directly from the ignition switch? Regards, Jaco Swanepoel South Africa KR2S, ZU-DVP
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