Installing Heated O2 Sensor
Thread Starter
Burning Brakes
Joined: Jan 2008
Posts: 1,187
Likes: 1
From: Superior WI
Installing Heated O2 Sensor
So I'm putting a heated O2 sensor in and I'm wondering where some of you fine folks have decided to tap into the power to...well...power it up. Thanks
Le Mans Master
Joined: May 2004
Posts: 5,866
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From: Hellinois
Finalist 2020 C4 of the Year - Modified
On my '85 I used the fan relay that is mounted on the driver's side inner wheel well just below the master cylinder. The blue wire is the keyed power wire.
Le Mans Master
Joined: Oct 2007
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From: Akron Ohio
2025 Corvette of the Year Finalist - Modified
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2022 C5 of the Year Finalist - Modified
St. Jude Donor '09-'10-'11
On my '90 I used the blue wire coming out of this relay by the brake booster on the firewall. I think it is the same one Midnight is talking about.
Glad you asked I was about to ask the same thing.. 
