louibluey
Well-Known Member
- First Name
- Joe
- Joined
- Dec 21, 2020
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- Location
- NY
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- FE "Louibluey" GB
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- retired
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- #1
Nice day, tore apart the frunk again. Pulled Fuse F72 to simulate dead/low 12V LVB.
At the bumper emergency release red/black wires -
Jump pack with override does work, small 12V lead acid battery does work. 9V battery (double checked with power supply does not work).
When the process starts, the resistance across the red/black wires is 47k ohm (means very low initial current). That means electronics is being powered to run the frunk emergency release process. After a moment, there is a first pulse of about a second at about 1.2A (Fluke meter DC clamp on min-max) to the little motorized gear box actuator. Then, after another moment, there is another 1.2A pulse, also about a second in time (did not break out gear to measure time or current exactly).
There could be overvoltage protection, however I strongly recommend, short of advice from Ford, to not try two 9V batteries, because 18V might damage the electronic circuits (this is not last century all relay logic, there is some electronics involved, possibly even a small micro).
At the bumper emergency release red/black wires -
Jump pack with override does work, small 12V lead acid battery does work. 9V battery (double checked with power supply does not work).
When the process starts, the resistance across the red/black wires is 47k ohm (means very low initial current). That means electronics is being powered to run the frunk emergency release process. After a moment, there is a first pulse of about a second at about 1.2A (Fluke meter DC clamp on min-max) to the little motorized gear box actuator. Then, after another moment, there is another 1.2A pulse, also about a second in time (did not break out gear to measure time or current exactly).
There could be overvoltage protection, however I strongly recommend, short of advice from Ford, to not try two 9V batteries, because 18V might damage the electronic circuits (this is not last century all relay logic, there is some electronics involved, possibly even a small micro).
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