Welcome to the Corvette Forums at the Corvette Action Center!

Help! O2 sensor wiring

mciamp99

New member
Joined
Jul 5, 2012
Messages
2
Location
Wilmington
Corvette
1991 Coupe, 1975 Black Cherry, 1972 Steel Cities G
I have a 1991 L98. I recently replaced the O2 sensor on the drivers side. There is only one wire going to the O2 sensors, there are 3 wires coming out of the harness. My problem is two of them were broken and I can’t figure out where they go. I believe one is a ground, any suggestions on the other wire would be greatly appreciated. I can’t find it on a wiring harness. Car ran better with one grounded, think it will run better if I find this connection.
 

LLC5

Well-known member
Joined
Sep 28, 2004
Messages
2,299
Location
Wa.
Corvette
98 black 6spd convert.
I have a 1991 L98. I recently replaced the O2 sensor on the drivers side. There is only one wire going to the O2 sensors, there are 3 wires coming out of the harness. My problem is two of them were broken and I can’t figure out where they go. I believe one is a ground, any suggestions on the other wire would be greatly appreciated. I can’t find it on a wiring harness. Car ran better with one grounded, think it will run better if I find this connection.



How many wires were on the OEM sensor that you removed?
 

Hib Halverson

Technical Writer for Internet & Print Media
Joined
Jan 10, 2001
Messages
13,453
Location
CenCoast CA
Corvette
71 04 12 19
91 VIN 8 uses single-wire sensors. The two broken wires likely go to some other device.

If you have the Electrical Supplement to the 91 Factory Service Manual, you'll find a wiring diagram in that book.
 

mciamp99

New member
Joined
Jul 5, 2012
Messages
2
Location
Wilmington
Corvette
1991 Coupe, 1975 Black Cherry, 1972 Steel Cities G
I have the supplement manual. It does not identify them. As I said, one is a ground, can’t identify the other. The diagram in the supplemental manual does not identify them, at least I can’t see them in The diagram. All three wires look the same, 22 gauge black wire. For lack of a better solution I am going to ground it and see if that smooths everything out.
 

Corvette Forums

Not a member of the Corvette Action Center?  Join now!  It's free!

Help support the Corvette Action Center!

Supporting Vendors

Dealers:

MacMulkin Chevrolet - The Second Largest Corvette Dealer in the Country!

Parts/Accessories:

Vetteskins

Advertise with the Corvette Action Center!

Double Your Chances!

Partners

Top Bottom