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    Yeah, but I tested the volts also with piercing...

    Yeah, but I tested the volts also with piercing probes. 1 and 15 have 8.5 V when the motor is running. With all connectors hooked up to the RAS control module, pin 22 has 1.5 mV most likely that...
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    The RAS fuse in the BJB reads normal battery...

    The RAS fuse in the BJB reads normal battery voltage, +1 V more if the motor is running and the alt is charging.

    Uhhh... Pin 2 in the diagram (and the FSM wiring diagram) should receive 12 V from...
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    Went further with testing, and the Wiring...

    Went further with testing, and the Wiring Botch-o-Meter is close to the red line!

    I'll repeat some things to make the findings clear:

    1. The RAS takes all times hot battery power for the...
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    THE SAGA CONTINUES, AND THE SITH STRIKE BACK. ...

    THE SAGA CONTINUES, AND THE SITH STRIKE BACK.

    Meaning - we're not there yet.
    Still have so little time to do this, but I keep at it.
    Here's what I've done so far:
    1. Decided to unhook all...
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    UPDATE: Okay, the day has been somewhat...

    UPDATE: Okay, the day has been somewhat successful.
    I dug through the wiring diagrams and found the splices and power distribution connectors between which the things going on now in the wiring...
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    Sure, grab a seat, brewskis, and popcorn! ;)

    Sure, grab a seat, brewskis, and popcorn! ;)
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    MOAR NEWS: The plot thickens. The fun part is...

    MOAR NEWS: The plot thickens.
    The fun part is that when I hook up the control module AND turn on the ignition, I get 12 V on both RAS-related fuses (CJB #5 and BJB #8)... and with one of the 2...
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    UPDATE, DAY 2: With the new compressor and a...

    UPDATE, DAY 2:
    With the new compressor and a known working RAS module, I installed both (brand new) air spring solenoid valves.
    Now I lost voltage at air suspension control module harness-side pins...
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    OK, UPDATE: Finally got some free time to...

    OK, UPDATE:
    Finally got some free time to continue the diagnostics:

    Hooked up a new compressor and a known working RAS control module. Nada, got the CAS warning light again. This is definitely a...
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    UPDATE: Getting there, but slowly (no time on...

    UPDATE:

    Getting there, but slowly (no time on my hands until next week, gah!).
    I'm gonna run FSM diagnostics on the EVO/steering angle sensor connections, since circuit 57 is affected. Gonna keep...
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    More updates: On with the RAS diagnostic...

    More updates:

    On with the RAS diagnostic procedure.
    I already pinpointed several problems:
    Circuit 57, suspension module harness pin 6 (wired to the steering position / angle sensor) has 80...
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    I dug into the dash. The mystery splice off...

    I dug into the dash.

    The mystery splice off connector C2131b, grey/black wire (circuit 679) followed across the dash and down pillar A. It joined a harness that was not in the cable ducting along...
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    Yup, but I'm in luck: got the whole FSM...

    Yup, but I'm in luck: got the whole FSM diagnostic procedure on hand. I don't have the Super Star II scanner for the air suspension, but from what I garner from there and the wiring diagrams, the...
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    UPDATE: The weekend was semi-successful with...

    UPDATE:

    The weekend was semi-successful with the air suspension diagnostics.
    The vent valve is dead (the diode on the coil and the winding are). Ordered a new compressor from Arnott; the old one...
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    Well, Dereck's writeup says the ride height...

    Well, Dereck's writeup says the ride height sensor should be driven with 3.3V during the bench ohm-out. I do not know why said 3.3V specifically.

    It's either a specifically test-bench voltage...
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    That is what was specified by Dereck in the link...

    That is what was specified by Dereck in the link above on the LincolnsOnline forum. I might ask why this specific value, but it might have something to do with the ride height sensor being a Hall...
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    Lemme clarify: I started out by hooking up...

    Lemme clarify:
    I started out by hooking up brand-new spring solenoid valves and the replacement height sensor (from a wrecked '99 TC). The Check Air Suspension (CAS) light came on after five flashes...
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    Whaaat? :D BTW, ohmed out the replacement ride...

    Whaaat? :D

    BTW, ohmed out the replacement ride height sensor from Clay. The switchover pattern read by the change in resistance matches the pattern from Dereck's writeup:

    54247

    ...I'm...
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    Oh geez, correction: the test connector is where...

    Oh geez, correction: the test connector is where it should be, aft of the air suspension switch in the trunk, LOL. I confused it with one of the two connectors on the LH plastic wheel arch, behind...
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    PS. I found the air suspension test connector....

    PS.
    I found the air suspension test connector. It lives on the LH fender, right to the aft of the washer fluid tank. It is secured to a mock receptacle which has no wiring but a bridge / jumper wire...
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    I got my hands on the full air suspension...

    I got my hands on the full air suspension diagnostic procedure from Ford's MY'00-04 electronic FSM (it's a print to PDF from the relevant section, and boy, it's extensive). I read the whole section...
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    That won't be problematic, just tedious. I got...

    That won't be problematic, just tedious. I got the correct wiring diagrams for MY 2002 and a big extract from the FSM diagnostic procedure. I wish I had the Super Star II tester on my hands, but a...
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    Thanks for the input. I was thinking the same...

    Thanks for the input.
    I was thinking the same thing; I got the used ride height sensor complete with the onboard harness connector (cut off the remainder on a wrecked LTC). It will make it easier to...
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    ['02 MGM LS] Air suspension diagnostics?

    Hi all,

    I'm restoring the air suspension on my 2002 GrandMa. I got the car with cop springs, someone got cheap on replacing the ride height sensor, dropped in the cop springs, disconnected the LH...
  25. Thanks for the part numbers. Are they open on...

    Thanks for the part numbers. Are they open on both ends?

    EDIT: Scratch that, they are. OK, will get them!
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