Archesgarage Posted November 13, 2020 Share Posted November 13, 2020 Alrightly, first post here. I have a 96 ford "club wagon" says on the title unsure if its a 250 or 350. But it has the 5.8l I keep getting p1131 code. The wiring is goofy as heck. On the factor harness I have Red. Red/white. Gray/white. Gray/red. The red should be vehicle power and have the same voltage as the battery with key on. It should be upper right on the connector. But im not getting power to it. Red/white goes to something called HEGO MN NO. 11 I think that translates to HO2s or bottom left. This has 12v should show nothing as its a return line according to my diagram. Gray/light blue goes to HEGO NO.11 I believe thats the heater. Top left of the connector. Gray/red goes to signal return. Now my question is why am I getting power out of red/white and not red? Is there a common area these cross that might have crossed? Also does anyone have first world knowledge as to if this info is correct? Fuel trim on bank one and bank two are the same so it is not running lean. Both long term and short term. Please help. Quote Link to comment Share on other sites More sharing options...
theoldwizard Posted November 13, 2020 Share Posted November 13, 2020 (edited) HEGO should have 4 wires. 2 for the heater and 2 for the actual sensor. I don't have access to a wiring diagram so this is a shot in the dark. With the engine running, put a test light from a good ground to each wire. One will be +12v for the heater. (My gut says it will be gray.) If you don't have +12V on one wore, you probably have a bad fuse. From that +12V source, test the other wires. One will be the heater ground (the other gray wire ?) but one will be sensor ground. Edited November 13, 2020 by theoldwizard Quote Link to comment Share on other sites More sharing options...
Archesgarage Posted November 14, 2020 Author Share Posted November 14, 2020 14 hours ago, theoldwizard said: HEGO should have 4 wires. 2 for the heater and 2 for the actual sensor. I don't have access to a wiring diagram so this is a shot in the dark. With the engine running, put a test light from a good ground to each wire. One will be +12v for the heater. (My gut says it will be gray.) If you don't have +12V on one wore, you probably have a bad fuse. From that +12V source, test the other wires. One will be the heater ground (the other gray wire ?) but one will be sensor ground. So I ran power down the harness remotely, i didnt have power on red and grey/red. So i ran new wires directly from the ECU connector, that caused power issues for several other sensors. Back to square one tomorrow but the 02 ran right. Its DEFINITELY not a fuse or I wouldn't have any o2s. 02s ground right to the exhaust manifold Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.