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Regina O2 Sensor Connection 700 1989

posted by  johhnyb on  Mon May 2 03:48 CST 2005
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Hello,

On my 1989 740 Regina FI System, where does the O2 sensor connect I follow it into the wiring harness after that i get lost where do I look?

JOhn








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Regina O2 Sensor Connection 700 1989

posted by  c_j_mooney on  Mon May 2 14:21 CST 2005
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last visit: Wed Sep 14 17:39 CST 2011
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If you're looking for the connectors, they're under the brace that runs from the right strut to the firewall, look for a thick green wire leading into the harness. That's the ECU side of the signal wire. I believe the heater wires are both red, running to a separate connector.
--
Chris, Dartmouth NS Canada 70 M-B 280SE, 83 245DL, 84 244 turbo, 90 780 turbo, 92 VW Golf








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Regina O2 Sensor Connection 700 1989

posted by  Jim Holst on  Mon May 2 08:15 CST 2005
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last visit: Tue Jan 4 11:05 CST 2011
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I haven't traced that through but here is a wiring diagram which might help. Scroll down to the Regina section. It's for the B234 engine but I'd bet the circuit is the same.

http://www.autoelectric.ru/auto/volvo/740/1989/740-89.htm







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