[jjomaa]

Hello everyone, I have a new X5M and I noticed a bunch of wires coming off the positive terminal under the hood. One of which has a clip with a cover on it. Can someone help me with understanding what this is for ? I was thinking maybe to charge the vehicle.

Thanks

[Marty in NY]

Originally Posted by jjomaa

Hello everyone, I have a new X5M and I noticed a bunch of wires coming off the positive terminal under the hood. One of which has a clip with a cover on it. Can someone help me with understanding what this is for ? I was thinking maybe to charge the vehicle.

Thanks

Could it be possible that the dealer forgot to remove their charging cables? That's what it seems like to me.

[jjomaa]

No the car arrived brand new and got delivered the next day wasn’t an off the floor purchase

[aaaaaaaaaz]

Looks like a trickle charger. It has a 7.5 Amp fuse goes to positive terminal; the freestanding end seems to be the quick release connector to the main charging unit; the other cable goes to the ground terminal?

[weinerbarn]

Can you follow where the rest of that wire loom goes that has the yellow wire in it? Check your window sticker and also especially your buyers order and finance paperwork. There may have been a dealer installed option such as a vehicle tracker or something else.

[jjomaa]

Sorry was out of town for the weekend.

I’ll check tomorrow thank you so much for the reply’s. My question is do any of you see this under your hood?

[weinerbarn]

Originally Posted by jjomaa

Sorry was out of town for the weekend.

I’ll check tomorrow thank you so much for the reply’s. My question is do any of you see this under your hood?

No. That looks a lot like an add-on between the zip ties and the way it's mounted under the battery terminal.

[Qsilver7]

I wonder if it’s a new version of the old main battery switch that is used to keep the battery from discharging as it makes its way from Dinglefing Germany to the VPC center where they are supposed to remove and return it to BMW.

This is the old main battery switch from the E chassis days. It even had a code number that would show up on the build sheet (S818A):

[Tejas1836]

I would splice a NOCO charger quick disconnect into that

[crazyinp]

wonder why it has 3 wires? I would trace it and see where it is going. Definitely something the dealer did.

[Tejas1836]

Yellow wire most likely a Li-Ion thermistor connection, if it were connected to said battery

[crazyinp]

Originally Posted by Tejas1836

Yellow wire most likely a Li-Ion thermistor connection, if it were connected to said battery

I don't believe X5M came with Li-ON battery, but might be wrong.

[weinerbarn]

That loom looks like it's headed toward the front of the vehicle, not up toward the battery in the cowl. That's why I would trace it and find out what it terminates to.

[Tejas1836]

Originally Posted by crazyinp

I don't believe X5M came with Li-ON battery, but might be wrong.

I believe you are correct. Likely they have one harness for multiple vehicles.

[E91toG05]

Could it be some crappy dealer ad-on? We once purchased a car that was wired for a starter kill of some sort - if you chose not to buy it, they just left it in the car.

[jjomaa]

They just informed me it’s for the block heater located in the front grill somewhere. We live in Canada and for people who park outside would use this connection. But doesn’t explain the extra connector under the hood

**Update**

I was misinformed, this is actually a Defa charging cable which has an inlet in the front grill passenger side l, they do not have a block heater for that engine.