[fiatatat]

Smart people of the forum.

How do I unplug this without breaking? This is a HV component connection, there are a few of those under the hood. An older DELPHI model, so I cannot find any documentation.

If I try to pull the white tab, it seems to bend down towards the big orange plug and won't move. Maybe there's a lock hidden somewhere?

 

[fiatatat]

Here's one more:

 

[DeadEye]

The second one looks cracked already ?
can you push down on that white edge - can you feel it move into the connector ?

 

[fiatatat]

I did not even touch the second one, I would think this is plastic deterioration or somebody tried something before me, haha.

Anyway, I was told that first you need to unlock and unplug the small black connector and then go through the locks of the orange one. Will try it.

HV connectors are tricky, I can tell you that.

 

[JW4]

Pretty sure the white tab should slide out to enable you to squeeze the orange connector to unplug it. If it does not move, try some contact cleaner spray, it could be just stuck due to dirt, etc. All of these connectors operate approximately the same way: you either squeeze the lock, or slide the tab, or slide and squeeze

 

[fiatatat]

So the white tab has a lock under the black connector. Once you remove the black connector (pulling out the red tab first), you can press the lock and undo the white tab. The ones I'm doing are muddy so it will take a while, but I will try to post some pics.

 

[Electric Tire Shredder]

I hope you're going to clean them off first.

 

[fiatatat]

Whats your best suggestion for cleaning off the dirt? I tried to use compressed air, but the efficiency is limited.

 

[Electric Tire Shredder]

I'd try a light spray of water, with light scrubbing with a paint brush.

If that didn't work, add a bit of dishwashing detergent to the water & then rinse with pure water.

Before separating any parts, dry well, with a hair dryer on low, if needed.

 

[JW4]

There seem to be faster and simpler options. Just place a garbage bag underneath/around it, to catch the spills.

 

[fiatatat]

There you go. first you remove the red lock (pulling it out does not do the job, jo need to remove it completely), then pull the black connector, then press down the lock on the white tab, pull out the white tab, press the secondary lock and pull out.

 

[WTILT]

Please do not disconnect any orange connectors unless you disconnect the HV system first. Any wires on the car that are orange or in an orange cover are HV. If you disconnect any of these there is a possibility of high voltage. If you somehow short a circuit, you could DIE! Follow all warnings in the owners manual. Look for how to disable the HV circuit via the HV disconnect.

 

[fiatatat]

Thank you for your concern, @WTILT. Usually in this forum people know what HV is and how to perform a service disconnect. The instructions here are about dealing with connector locks that could easily break if used improperly.

 

[Electric Tire Shredder]

I forgot to ask WHY you're unplugging the Power Distribution Center?

 

[fiatatat]

It is the easiest to practice on. The others are a pain to access. I'm trying to locate the cause of LOI and then see if it is related to the contactor issue.

 

[Electric Tire Shredder]

I guess you mean the issue you mentioned in the two threads below, where I failed to ask what happened when you tried the 3 contactor tests (Negative, Positive, & Precharge):

Batteries & Contactors Aren't Really...

My CO flex has never done that. Once it goes to low/off it never reconnects to the car. Wonder if it is a setting. I have never had issue with it not starting to charge. I Normally pull in and leave the car on and plug in then turn the key off. To limit contactor cycles. But even if I don't do...

www.fiat500owners.com

P0AA7-00 battery pack voltage isolation

Hi Got this error after finally my bpcm got fixed. Car runs fine. But isolation test won't run. Maybe somebody has detailed error description Do you know where in battery is isolation sensor? Error seems to point circuit error of this sensor Thanks

www.fiat500owners.com

 

[fiatatat]

I did not do the tests, but found that the resistance between HVPDC and the body was below the 200 kOhm limit, which means "vehicle inop", and could be the reason why the contactors would not close (and even if there is another reason, you still need to deal with the LOI first - a LOI should disable everything anyway).

Unplugged the battery heater and the resistance jumped up. So I'm in the process of trying to understand what to do next.

I wonder if the vehicle would get into ready status with a HV component disconnected. I spoke to one shop in our province, and they say "it might or might not". So trying to get more intel on that.