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eb145's avatar
eb145
Explorer II
Mar 16, 2014

Home Made Voltage Booster charges TT battery off 7-pin

My TT batteries charge really slowly from my truck alternator through the standard 7-pin trailer wiring harness. This is due to the large voltage drop while current is flowing on the long thin batter...
NinerBikes's avatar
NinerBikes
Explorer
Mar 17, 2014
Park the hood of your truck by your batterys, and apply some jumper cables while the motor is running. I think my Touareg TDI diesel alternator is 170 AH rated? Something about it has heat that's electrical while the diesel engine is warming up for the internal vents.

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