O2 sensor wiring question |
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O2 sensor wiring question |
r_towle |
Jan 30 2006, 11:36 AM
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#1
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Custom Member Group: Members Posts: 24,591 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
Hi,
A generic 4 wire bosch O2 sensor has a black , a grey, and two white wires. How do you know what way to connect the white wires? Does it matter which way the white wires are connected? There are no markings on them to distinguish one from the other... Rich |
lapuwali |
Jan 30 2006, 01:43 PM
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#2
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Not another one! Group: Benefactors Posts: 4,526 Joined: 1-March 04 From: San Mateo, CA Member No.: 1,743 |
If you mix the grey and black wires, you have a problem (one is signal ground, the other is the signal itself). The two white wires are the heater, and they're not polarized. Connect one to switched +12, the other to ground, and you're fine. You basically can't hook up the heater backwards.
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