Airbag codes 35, 51

[dnsherrill]

1994 Mark VIII, 92k
with my original module, I was flashing airbag error code 35
" Passenger side AirBag circuit Low resistance or shorted."
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put in a different airbag module from a '94 mark VIII (not wrecked but not known to be good) and I immediately got code 51
-Air bag diagnostic monitor internal thermal fuse-fuse blown due to intermittent short to ground"
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my bad luck? two bad modules? or is there something else going on?
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this car's never been wrecked, the 35 just popped up a few months ago...I checked the connection at the crash sensor by the grill, the a plastic connector a few feet away, which I cleaned and reconnected...no change
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also probably not unrelated, I recently replaced a bad air ride module right next to the airbag module...possible leaking water at the fresh air intake at cowl grille?

 

[driller]

Odds are the original module is good and the 2nd module is bad.

Follow the original diagnostics for code 35?

As far as water intrusion, it should be apparent if there was water damages to the module.

 

[dnsherrill]

Odds are the original module is good and the 2nd module is bad.

Follow the original diagnostics for code 35?
.

right, I'll pull out the replacement module (also from a 94 Mark VIII), and put the original back in.
I found this on a Mustang forum in a thread about a 2001 GT with code 35. I wonder if my circuits are the same color wires?
When I check resistance, will it be with module connected, passenger bag disconnected, and battery negative disconnected at least one hour prior? I'm checking that shorting bar at the air bag for full retraction?
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35
Normal Operation

NOTE: The connector for the passenger side air bag module has a metal spring clip that acts as a shorting bar. This shorting bar is built into the plastic hardshell connector on the back of the passenger side air bag module assembly. The shorting bar is designed to short the passenger air bag terminals together when the connector is not mated. DO NOT attempt to remove the passenger side air bag module shorting bar and measure the resistance of the passenger side air bag module.

The air bag diagnostic monitor measures the resistance across Pin 8 (Circuit 614, GY/O) and Pin 9 (Circuit 616, PK/BK) every time the ignition switch is turned to RUN. Normal resistance across these circuits is between 0.9 ohm and 1.1 ohm. This resistance comes from the passenger side air bag module itself. If the resistance across Pin 8 and 9 is less than 0.7 ohm, the air bag diagnostic monitor will flash code 35. If low resistance is measured across Pins 8 and 9, diagnostic trouble code 35 will appear.

Possible Causes
Low resistance across Pins 8 and 9 can be caused by:
1)A poorly mated passenger side air bag module harness connector not pushing the shorting bars back into their fully retracted positions.
2)A damaged shorting bar may short Circuits 614 (GY/O) and 616 (PK/BK) together.
3)A short across the passenger air bag terminals within the passenger side air bag module assembly. DO NOT attempt a direct resistance measurement of the air bag. Follow the diagnostic procedures to determine if the passenger air bag resistance is lower than normal.
4)A short in the wiring harness between Circuit 614 (GY/O) and 616 (PK/BK).

 

[dnsherrill]

The wire colors are the same on my car,
With pass bag disconnected resistance across the pins of the bag connector is 0.2 ohms; with key at run, resistance at the female connector from module is infinite...
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Shorted module? There are just those two wires at the bag connector, and they are part of the cluster in the black connector at the main bright blue air bag module