BJB power

[Jeffs72MGB]

Has anyone found a way to power the battery junction box when it has been opened up to reveal the fuses? I'm trying to track down a parasitic draw that's coming from the BJB.
Thanks Jeff

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[Quest]

I've found a good way to find a draw is to use a thermal camera
Whatever is drawing will also get warm

 

[BlueSpec1]

I could see Ford's GSB 26-7020 backfeed method to the BJB from Trailer Relay Module connector over to the a hybrid's 12v battery could be done.
Doesn't look very workable on an Ecoboost.

https://www.mavericktruckclub.com/f...do-new-parasitic-draw-test.79966/post-1318103

GSB 26-7020
9. Connect a fused jumper wire (30A) between the negative battery cable and the negative battery post to maintain a connection and prevent modules from resetting due to power loss.
10. Disconnect the negative battery cable from the negative battery post without breaking the connection of the fused jumper wire.
11. Install a multimeter with the leads in series with the negative battery terminal and negative battery cable.
12. Back feed a jumper wire using a 12 AWG wire or larger with a 30A fuse from the TRM power supply on C4397A pin 14 (BU-RD wire) to the battery positive terminal. The TRM is located behind the folding seat back of the rear seat on the driver's side of the vehicle. If the
vehicle does not have a TRM, the connector will still be present behind the rear seat. Keep this connected throughout the battery drain test.
CAUTION: To prevent damage to the jumper wires, do not start or run the engine while the 12 AWG fused wire is connected.
13. Separate the BJB to access the fuses."

2022-2024 Maverick TRM

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