BMS Disconnected - 3.0l Diesel - Draw on battery - Ford F150 Diesel Forum
 
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post #1 of 3 (permalink) Old 03-23-2019, 01:23 PM Thread Starter
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BMS Disconnected - 3.0l Diesel - Draw on battery

I have a radar detector that display voltage. I have noticed since I unplugged BMS at the negative post, the radar would never shut off and when I would come out in the morning battery voltage would be 11.9-12.3v, not a healthy charge.*
Last night I plugged BMS in and left the hood cracked. This morning radar was off and my voltage via multimeter was 12.67v.*

Anyone seen this before? Ive read numerous threads about disabling BMS on the gas engines and no problems. Something seems to be different with the diesels.

2018 Ford F-150 King Ranch 3.0L Power Stroke 4x4 | Icon 2.5 Front & 2.0 Rear, Toyo AT II 295/60R20, 3" ProComp Rear Block, S&B Dry CAI, LineX & BakFlip MX4, BuiltRight Seat Release | ForScan Mods: Disable Double Honk, 2x Panic, DPF Full %, Digital Temps Above Gauges, A.S.S Disabled
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post #2 of 3 (permalink) Old 03-23-2019, 04:18 PM
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Just guessing but the BMS can shut off various components and systems if they remain active after the truck shuts down. Seems a radar detector would be minimal draw though. I think it is the same system as the other F150s.
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post #3 of 3 (permalink) Old 03-23-2019, 04:48 PM Thread Starter
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Has anyone on here disabled ASS with Forscan? Can you test your battery voltage over night?

2018 Ford F-150 King Ranch 3.0L Power Stroke 4x4 | Icon 2.5 Front & 2.0 Rear, Toyo AT II 295/60R20, 3" ProComp Rear Block, S&B Dry CAI, LineX & BakFlip MX4, BuiltRight Seat Release | ForScan Mods: Disable Double Honk, 2x Panic, DPF Full %, Digital Temps Above Gauges, A.S.S Disabled
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