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1988 740 code retrieval 700

posted by  Nahtanha on  Wed Sep 16 11:17 CST 2020
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last visit: Tue May 20 10:10 CST 2014
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I was wondering if there is a test wire for code retrieval for my 1988 745t engine. There is test wires on the passenger side of engine for basic idle setting and another test wire for AMM / O2 sensor settings. I was wondering what the test wire on the driver side are for? Didn't know if this engine uses a flash (blinking light) codes. My car runs fine but, wondering if there is a faster way to diagnose any problems ?








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    1988 740 code retrieval Red/ Yellow wire on driver side fender. 700

    posted by  Nahtanha on  Thu Sep 17 18:15 CST 2020
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    last visit: Tue May 20 10:10 CST 2014
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    Guess what I'm fishing for is , What are the red/yellow wire and pink wire for on the driver side fender. I know the passenger side fender has a green/white and a red/white wire to set the idle base speed and set the parameters of the AMM and O2 sensor.








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    1988 740 code retrieval 700

    uid 27's pic
    posted by  Art Benstein on  Thu Sep 17 10:16 CST 2020
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    last visit: Fri Oct 17 20:10 CST 2014
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    Yes on the 700 with EZ117K ignition, I think you need to supply your own blinkety light (test diode) as described in the FAQ list posted above. Just for ignition. AMM adjustment for LH2.2 is just a way to see the oxygen sensor before the days of high-impedance multimeters. No real OBD1.
    --
    Art Benstein near Baltimore

    Those who race through life finish first. (Darrel Hunsbedt)







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