Skip the auto shop - Our mechanics make house calls

Q: how do I install a load resistor so that my alternator doesn't drain my battery

asked by on

My car for some reason won't keep charge. So I got a brand new alternator and battery but the battery still ends up getting drained of power and my car just shuts down. To solve this I was told I can install a load resistor. I don't know how. Part of it is installed but I don't know wht to do with the other end that has nothing connected.
My car has an automatic transmission.

A: I’m not sure what you were told but a load ...

I’m not sure what you were told but a load resistor will only drain your battery and charging system more. It sounds like you have a problem in the charging system not providing enough power for the electrical load you have put on it. From what you’ve described, you may have a massive power drain like a big amp or a radio and amp setup that is using up more power than the engine alternator can handle.

I’m not completely sure but I think what someone was telling you to get a capacitor bank to power the amp you have. This will help store extra power for the times the amp bass needs more power. This component will not allow the amp to take power directly from the battery. You should look at getting a higher capacity battery and alternator for your car if this is the case to go along with a capacitor bank.

I’d suggest getting this looked at by a qualified technician, such as one from YourMechanic, who will be able to diagnose your draining battery and help you fix it accordingly. Good luck.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Radiator blower fan makes noise

Hi. A noisy radiator fan can range from the issue being a bad fan bearing or a foreign object hitting the fan causing the noise. I suggest that a well trained technician, such as the individuals at YourMechanic, inspects the...

Q: Bell ringing noise, stalling and then dies - 1995 Ford E-350 Econoline Club Wagon

These bells indicate a problem that the built-in diagnostic system is unable to indicate on the dash (usually a burned out fault indication bulb). Replace the burned out indicator bulb on the dash, then check out the original problem by...

Q: Brakes

Hello. If the issue only began after you changed the master cylinder, then it is likely that the issue is related to it. Certain brake master cylinders will require them to be pre-bled before installation and will not function properly...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.