All electrical dims when gas is let off ??

[GSX95AWD]

While driving the car, all the lights are nice and bright, but when slowing down to a stop light, the dashboard lights, Heater speed, and everything slows down and dims until i give the car gas, then all the lights brighten back up. The battery is new and i have no problem with a dead battery. What would solve this ?

 

[AngelOfPassion]

My car did this exact same thing three days before my battery literally exploded in my bay. Make sure you are not overcharging it. The alternator could be overcharging the battery, check the voltage while running AND while under load. Also, do a quick check for possible electrical shorts.

I would not recommend waiting for this problem to simply go away from my experience.

We had to replace the alternator, battery and some of the wires in between to get mine to stop doing that. I'm not sure which was the cause because we did it all at once. But it's fine after replacing those parts.

From my experience the lights were actually getting brighter when the car was moving. It wasn't that they were dimming when the car came to a stop. Same thing as you said really but the "normal" amount of light was when the car was idle.

 

[undefined0000]

Alternator is responsible for maintaining charge while the car is running by the means of converting kinetic energy into alternating current. The use of a voltage regulator allows for somewhat even charging throughout the different engine speeds. Low voltage at low engine speeds would indicate an issue within the alternator. I would suggest that you get it load tested at autozone or your favorite DIY auto parts store.

A simpler issue could just be a weak connection.

My car did this exact same thing three days before my battery literally exploded in my bay. Make sure you are not overcharging it. The alternator could be overcharging the battery, check the voltage while running AND while under load. Also, do a quick check for possible electrical shorts.

I would not recommend waiting for this problem to simply go away from my experience.

We had to replace the alternator, battery and some of the wires in between to get mine to stop doing that. I'm not sure which was the cause because we did it all at once. But it's fine after replacing those parts.

From my experience the lights were actually getting brighter when the car was moving. It wasn't that they were dimming when the car came to a stop. Same thing really but the "normal" amount of light was when the car was idle.

Damnit, beat me to it.

 

[mcrae_06]

I would pull your POS and NEG battery terminals, clean the posts and terminals, make sure the ground is good on the firewall behind the battery, make sure your battery water level is good (distilled only if applicable), and make sure your alternator plugs are nice and tight. Two posts above are probably right though; your alternator is probably on it's last leg, or your battery is shot, or both.

 

[boosteddsm98]

Most likely alternator related, go get it tested to eliminate that as a possible cause of the problem. Correct me if im wrong but i believe our voltage regulator is built into our alternator and its possible that would cause your lights to dim when your at idle.

 

[Total Eclipse]

Agreed, have the altinator checked, and check all the grounds as well. You would be suprised at what problems arise from bad ground connections. If you have a loose ground connection on the engine,for example, then the torque roll of the motor may be an issue as well as it pulls on the ground wire/strap.

 

[AngelOfPassion]

You realize that all three of you guys just responded to a thread that was figured out a month ago...

Edit:
Post count: 31
Post count: 26
Post count: 34

Oh... I get it Jk. Why are your guys post counts so damn low when you've all been members for so long?

 

[Total Eclipse]

I've been kinda a lurker for years, but figured I'd come in and contribute some of my knowledge, and maybe help some others out.