O2 sensor replacement color codes

[kinoschmid]

I am installing a new o2 sensor in a 1999 ranger 4.0 4x4 auto and the wire plug is melted. I got a bosh splice replacement but the instructions show the color codes for after the connector. what are the colors before the connector? Thanks for your help.
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[RonD]

Google: autozone Ranger wiring
Click on first link and you will get 1991-1999 Ranger wiring diagrams, scoll down to your year and engine and enlarge, bottom of diagram has the O2s

Looks like Lt Blue/Orange wire is the 12v wire for heating on all O2s, so it is a common color, Orange is the PCM reference ground, the other 2 wires are different for each the 3 O2s.

Senor 1 and 2 are on the exhaust manifolds, sensor 3 is after the Cat converter

If it looks confusing look at the other O2 sensor, the not melted one

 

[kinoschmid]

Thanks, that helps a lot.