Battery volts drop

allcarfan · #1 (**permalink**) 03-23-2016, 10:36 AM

Its not just the heater. If I turn on my heater...I get about a 1.2v drop. Turn on my electric fan...another 1v drop. Headlights, wipers, sound system, another 1.5v drop. (headlights are LED, so I am guessing there shouldn't be much of a draw.)

patrickt · #2 (**permalink**) 03-23-2016, 10:39 AM

Quote:

Originally Posted by allcarfan

Its not just the heater. If I turn on my heater...I get about a 1.2v drop. Turn on my electric fan...another 1v drop. Headlights, wipers, sound system, another 1.5v drop. (headlights are LED, so I am guessing there shouldn't be much of a draw.)

Then it is either 1) Your alternator; 2) Your voltage regulator; or 3) The wiring connections between your battery, the grounds, and the alternator itself.