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Good, so you are on the correct inline connector, and on the correct contact. So the male side of the connector contact M to ground is "0.L" ...open, and
1) So the male side of the connector contact M to ground is "0.L" ...open.
2) The female side of the connector contact M to ground is now reading 9300 ohms? So you mysteriously picked up 7600 ohms?
At this point I do not know what else to tell you. Not being there in person to see how you are holding the probes, verifying setup, and I honestly have no confidence in the setup you have there. On the surface, it sounds like you have isolated the issue to the female side of C102 contact M and star connector #1 contact E.
You should probably take it to a trusted electric shop that has reliable test equipment. Good luck.
This means when you disconnected the small brake fluid connector C152 , the resistance readings on M ( light blue ) serial wire going to pin 21 i the big C1 connector for the ebctm went into open loop resistance (infinite resistance) ?
This means when you disconnected the small brake fluid connector C152 , the resistance readings on M ( light blue ) serial wire going to pin 21 i the big C1 connector for the ebctm went into open loop resistance (infinite resistance) ?
No, he disconnected the BMPV connector from the EBCM
Last edited by lucky131969; Feb 14, 2025 at 10:44 AM.
I do have a Kent More breakoutbox with cables for the 97-00 and the 01-04 generation.
If the big connector( C1 and C2 is one piece shown below from my breakoutbox ) is disconnected from the ebctm the EBCTM is isolated from the car ,
it should not change any readings on the serial wire in this connector if the BMPV is connected or not to the EBCTM .
Maybe I am missing something ?
I do have a Kent More breakoutbox with cables for the 97-00 and the 01-04 generation.
If the big connector( C1 and C2 is one piece shown below from my breakoutbox ) is disconnected from the ebctm the EBCTM is isolated from the car ,
it should not change any readings on the serial wire in this connector if the BMPV is connected or not to the EBCTM .
Maybe I am missing something ?
You are absolutely correct....you are not missing anything.
Are you measuring like this with C102 connector separated and EBCTM connector disonnected from the EBCTM ?
( a ground point and starconnector term E (no 5 from left) with starconnetor link removed)
Are you measuring 9.3 ohm or 9.3 kohm ?
Are you measuring like this with C102 connector separated and EBCTM connector disonnected from the EBCTM ?
( a ground point and starconnector term E (no 5 from left) with starconnetor link removed)
Are you measuring 9.3 ohm or 9.3 kohm ?
Yes that is the way i am measuring and it is k ohms
[size=16px]BMPV disconnected it is open. [/size]
Scratch that I figured out what happened. I had disconnected the negative battery cable and that is what was causing the high resistance. It is back to 1.75K ohms.
star connector 1.75k ohms
c102 is 1.75K ohms firewall side
c102 other side is open
ebcm plug #21 is open
Last edited by Woopigsooie00; Feb 15, 2025 at 05:54 PM.
Scratch that I figured out what happened. I had disconnected the negative battery cable and that is what was causing the high resistance. It is back to 1.75K ohms.
star connector 1.75k ohms
c102 is 1.75K ohms firewall side
c102 other side is open
ebcm plug #21 is open
I am a bit confused how this 1.755 k ohms can appear ...
Now it seems like you have renoved the starconnector buslink and disconnect the C102 connector close to battery and disconnected the big C1_C2 connector at the EBTCM.
This means the serial wire between the starconnector in passenger footwell and the EBCTM is split into 2 wire pieces and you are measuring 1.75 k ohm between ground and serial wire between C102 and the starconnector .
Correct ?
Please do the same measurement once more but now use groundpoint G202 as negative reference to the same wire measurement points (light blue dots) .
G201 is located close to passenger footwell as my drawing below show
I am a bit confused how this 1.755 k ohms can appear ...
Now it seems like you have renoved the starconnector buslink and disconnect the C102 connector close to battery and disconnected the big C1_C2 connector at the EBTCM.
This means the serial wire between the starconnector in passenger footwell and the EBCTM is split into 2 wire pieces and you are measuring 1.75 k ohm between ground and serial wire between C102 and the starconnector .
Correct ?
Please do the same measurement once more but now use groundpoint G202 as negative reference to the same wire measurement points (light blue dots) .
G201 is located close to passenger footwell as my drawing below show
If your are measuring like my drawing illustrate it seems like you have a partially groundfault on the light blue wire 1122 between the starconnector and the C102 connector .
This part of the wire should have infinite resistance(open circuit) like the rest of the light blue1122 wire between the C102 connector and the EBCTM C1_C2 connector
I think you have to inspect the 1122 wire between the starconnector and the C102 connector to locate any possible place where this part of the light blue wire could be damaged
and causing this 1.9 Kohm of ground
Yes ,it is possible if you have some soldering skills and know how to do this or get help from a workshop to carry this job out .
Maybe a doublecheck on these measurement should be carried by a second person prior to this wire modification
First you have to find a proper path to put the new wire from connector C102 to the starconnector .
I wold guess to use the same path as the big red wire from battery plus to fusebox in passenger footwell is possible .
Secondly I would have cut the wire 1" from the starconnector and 1" from C102 connector and solder new wire in both ends to these 1" ends and I always prefer to cover each soldered places with heat shrink tape to avoid any future short circuit or ground fault on these two soldering places .
If you follow this path , please carry out the above measuments once again and verify open circuit between G202 and all point along the 1122 wire prior to put voltage back on the system(ebctm)
Then I think your readings are wrong. Maybe the DMM is wrong og used the wrong way.
I am running out of more advices on What to do now.
I think you maybe should bring the car to a Corvette workshop now.
I really don't know how you could use the dmm it the wrong way. Red line into connector black line on ground. Dmm on the ohms setting. I wonder if it has something to do with the connector itself. That is the only thing left in the line. I tried multiple grounds and they are the same resistance.
