Back-Up Camera/BLIS Issue

[MiataBro11]

I see where the issue is: It explains all the latest voltage check results (lower and not equal with load applied) it also shows why the rear camera has (no voltage)
The Splice @ S410 is broken.

Note: For clarity (all 4 wires) are spliced together @ 1 point (ignore the dashed line)

Now to find it

Location Description:

Rear Main Body Harness # 14405 - Near T/O (Take Off) to Ground Point G402

You will need to unwarp the harness to find it.

But to confirm before you pull apart the harness let's check some thighs first.

Find & Disconnect C411 - Connector

Do a check for power at Pin 6, same as above checks, does it match the readings that you had on the camera connector.
I want to eliminate the slight possibility that the camera leg from the splice being shorted to ground.

One last test if you want, just a secondary check for continuity

Disconnect C408 - C4483 - C4484 and C411 all at once

At C408 - (REARWARD) Connector - Jumper Pin #26 to Ground

Meter - Ohms Scale

At Connector:
C4483 - Pin #12 to Body Grd
C4484 -Pin #12 to Body Grd
C411 - Pin #6 to Body Grd

Shold be reading 3 ohms or less on all connectors, but I suspect you will get high resistance with C4483/C4484 and VERY High resistance on C411

So most likely a broken splice point but possible that between C411 and the Splice is a short to ground. My gut tells me it's the splice point. We have at least confirmed the problem lies between the rear camera connector and that splice point.

Awesome, sounds like a plan. I will get these checks done after work and report back.

Sponsored

 

[MiataBro11]

I see where the issue is: It explains all the latest voltage check results (lower and not equal with load applied) it also shows why the rear camera has (no voltage)
The Splice @ S410 is broken.

Note: For clarity (all 4 wires) are spliced together @ 1 point (ignore the dashed line)

Now to find it

Location Description:

Rear Main Body Harness # 14405 - Near T/O (Take Off) to Ground Point G402

You will need to unwarp the harness to find it.

But to confirm before you pull apart the harness let's check some thighs first.

Find & Disconnect C411 - Connector

Do a check for power at Pin 6, same as above checks, does it match the readings that you had on the camera connector.
I want to eliminate the slight possibility that the camera leg from the splice being shorted to ground.

Is C411 the connector right before the harness goes into the tailgate? If so mine looks physically like the one above but only has 8 spots, 7 of which are populated. Using the numbering system above my connector would have pins 1-4 and then 5,6, and 8. I am currently going to do the continuity tests from the rearward C408 to C4483/84. Just looking for clarification with C411.

 

[MiataBro11]

Additional update; C4483/84 both have resistance in the M Ohms (3-4M Ohms) between their pin#12 and C408 pin#26. I ran a jumper straight from pin#26 to my meter to rule out any doubt of resistance being caused by a poor grounding point.

 

[airline tech]

Yes, I checked another manual looks like they revised the connector, still pin #6 for power

 

[RangerBill]

 

[MiataBro11]

Yes, I checked another manual looks like they revised the connector, still pin #6 for power

Sweet, thanks for the clarification. I will check this one also then

 

[airline tech]

Additional update; C4483/84 both have resistance in the M Ohms (3-4M Ohms) between their pin#12 and C408 pin#26. I ran a jumper straight from pin#26 to my meter to rule out any doubt of resistance being caused by a poor grounding point.

I would find the splice and separate the wires and then test the one that appears to run forward to the C408 and continuity test or voltage test that one to confirm that it is good from C408 to that splice.

Then continuity test the wires from splice to the C4483 / C4484 and C411 connector

Then either resolder or environmental splice back together

 

[MiataBro11]

I would find the splice and separate the wires and then test the one that appears to run forward to the C408 and continuity test or voltage test that one to confirm that it is good from C408 to that splice.

Then continuity test the wires from splice to the C4483 / C4484 and C411 connector

Then either resolder or environmental splice back together

Copy that.

 

[MiataBro11]

Yes, I checked another manual looks like they revised the connector, still pin #6 for power

~1.5M Ohms between pin6 here and pin26 on C408

 

[airline tech]

To eliminate any possible issues, it may be a good idea to install the OE camera, so when the power issue is corrected, you won't have to deal with the new camera initialization giving you errors.
or at least plug it in, and then after confirmation of BLIS and Camera working again, then either return the camera or leave it installed but do the initialization procedure.

I was looking for any tie in for the Plate Lights - issue, the only tie in is that the plate lights power wire runs along the same harness, but it is to the left of the splice.
So, I have concluded that for the Plate Lights, the BCM has shut off power until it sees a proper self-test (this requires) a resistance load (bulbs) to be installed.

So once the connectors are replaced and bulbs are installed, run the self-test again and the code should clear and then the BCM should restore the power feed.

But since you have it opened up, it may be a good idea to continuity test the Plate Lights
C408 - Pin #3 to each plate light (power feed) wire (Yellow / Violet)
Jumper Pin #3 the same as you did for pin #26.
This way you can confirm that the wiring is good from C408 back

 

[MiataBro11]

Struggling to find the splice, no surprise there... Wasn't sure if either of you had any more detailed location info. According to the connector locations linked above, S410 should be just outboard of G402 and C433, but I don't see any splices. There are some brown and yellow wires but they are all fully independent. Just wanted to confir here before cutting into more of the harness.

 

[MiataBro11]

To eliminate any possible issues, it may be a good idea to install the OE camera, so when the power issue is corrected, you won't have to deal with the new camera initialization giving you errors.
or at least plug it in, and then after confirmation of BLIS and Camera working again, then either return the camera or leave it installed but do the initialization procedure.

I was looking for any tie in for the Plate Lights - issue, the only tie in is that the plate lights power wire runs along the same harness, but it is to the left of the splice.
So, I have concluded that for the Plate Lights, the BCM has shut off power until it sees a proper self-test (this requires) a resistance load (bulbs) to be installed.

So once the connectors are replaced and bulbs are installed, run the self-test again and the code should clear and then the BCM should restore the power feed.

But since you have it opened up, it may be a good idea to continuity test the Plate Lights
C408 - Pin #3 to each plate light (power feed) wire (Yellow / Violet)
Jumper Pin #3 the same as you did for pin #26.
This way you can confirm that the wiring is good from C408 back

I did put the OE camera back in after testing that connector last time, so we should be good there.

 

[RangerBill]

Struggling to find the splice, no surprise there... Wasn't sure if either of you had any more detailed location info. According to the connector locations linked above, S410 should be just outboard of G402 and C433, but I don't see any splices. There are some brown and yellow wires but they are all fully independent. Just wanted to confir here before cutting into more of the harness.

The splice S410 is located between the connectors C408, C411 Camera intermediate connector, C4483 BLIS, and C4484 BLIS.

 

[MiataBro11]

Splice found, not where it says it is on the connector diagram. Regardless, I think we found our culprit. Not sure how water got through the electrical tape, through the plastic harness wrap, through the heat shrink, and ruined this splice, but it did.

Also for anyone else who finds their selves in this unfortunate position, S410 is BETWEEN G402 and G400, not as indicated on the diagram. Will update once I fix the wiring.
Location:

 

[RangerBill]

Great news. Looks like you should be back in business after the repair.

Sponsored