How much voltage does a starter relay need?
How much voltage does a starter relay need?
Working the starter switch should cause a drop from 12 volts to below 0.5 volts. If the voltmeter reading stays above 0.5 volts, look for a bad connection at the battery earth strap (at either end) or the engine-to-body earth strap.
Why is the battery draining on my Ford Mustang?
Started checking fuses and found #8 inside car blew. This feeds the radio, courtesy light, clock, instrument cluster, and alarm. This is hot w/key off with minimum current needed to power alarm, and store radio stations and clock time. Next step was to check current draw after replacing the fuse.
What should current draw be on Ford Mustang battery?
Replaced it and all works okay now. After fixed, current draw at battery shows 0.08 – 0.10 amp with alarm plugged in, and steady 0.08a with alarm box pulled. Neighbor had good idea of checking battery voltage (I didn’t think of this) – he said the dash gauge would show 8 volts after 4 days when the car wouldn’t crank.
How long does it take a car battery to drain?
I estimated 1.0a draw might drain battery in 4 days. Started checking fuses and found #8 inside car blew. This feeds the radio, courtesy light, clock, instrument cluster, and alarm. This is hot w/key off with minimum current needed to power alarm, and store radio stations and clock time.
Why is the battery draining in my Ford Mustang?
The most common cause with Ford’s battery draining is the voltage regulator located in the alternator. It is not a difficult job to replace once you have the alternator out of the car, and the voltage regulator sells for about $15 on ebay. If not mechanically inclined have the alternator replaced.
When does a car battery start to drain?
If the battery drains when the vehicle sits for three or four days, that’s a lower amp draw than one that drains the battery overnight. Discovering the source of an electrical draw is a process of elimination. First, check the easy stuff.
Replaced it and all works okay now. After fixed, current draw at battery shows 0.08 – 0.10 amp with alarm plugged in, and steady 0.08a with alarm box pulled. Neighbor had good idea of checking battery voltage (I didn’t think of this) – he said the dash gauge would show 8 volts after 4 days when the car wouldn’t crank.
Why does my Ford F-150 have a slow power drain?
This probably sounds familiar for some 2004–2008 Ford F-150 owners, as that generation had parasitic battery drain issues caused by a failed park sensor not allowing the body control module to turn off interior components. Slow power drains are inconvenient and annoying, and result in a shorter battery life.
