Thread: Battery and E-brake Dashboard lights flickering

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2011-09-15 21:24:00

#21

Kyle

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ok....

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2011-09-18 16:42:15

#22

Nismo_sr20 Online/offline status of Nismo_sr20 is unknown

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Originally Posted by ls4546

Check battery connections, if they're tight you'll probably need an alternator very soon. Those two lights coming on means you alt is not charging your battery properly. If you have a volt meter start the car hook the leads up to the battery and see what the alt is putting out. With the car off the battery should read between 12.6-12.8v with the car running it should be between 13.4-14.4v max. If it's anything below 13v with the car running replace the alt.

Battery connections are good. Voltages are also in spec.

Originally Posted by BenFenner

Don't forget to check the large gauge connection(s) to the alternator itself. Those could be making poor contact.

It's probably the alternator though if all the wiring is fine (including the stuff they told you to check above).

This connection is solid.

Originally Posted by WingmanSR20

True, it's not complicated, but often overlooked. Prime example is the wire that goes from the dash gauges to the alt.

Not only does it supply the +12v you need for the alternator to know it can charge, but it also grounds through the alternator when it's bad. Have that wire lose some insulation from age or rubbing, and you'll get flickering lights like he described, as well as inconsistent charge voltage. All from one simple, easily overlooked wire.

Still waiting to hear what he's found, though.

Any info on how to check this wire? Is it the wire with the "clip" style connection that goes to the alternator? Thanks! So far all the connections are solid and clean, and connections are good for sure up until the alternator harness goes into the main harness. Don't really want to have to break into the main harness if don't have to (we'll see i guess though)...

Thanks all!

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2011-09-18 19:13:45

#23

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Originally Posted by Nismo_sr20

With the ignition on, it should supply +12v. I'd have to look at the diagram to confirm the wire color though. It is one of the 2 in that grey clip, though.

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2011-11-15 01:02:45

#24

Nismo_sr20 Online/offline status of Nismo_sr20 is unknown

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just wanted to let y'all know that the problem was a faulty alternator. Even though it tested fine at the autoparts store, i replaced it anyways cuz i checked everything else. Anyways, after replacing it the problem went away. thanks advance auto for the crappy alternator and the crappy alternator test machine!

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2011-11-15 01:25:10

#25

lynchfourtwenty Online/offline status of lynchfourtwenty is unknown

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lol.. its Always the alternator.

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2012-04-30 00:16:56

#26

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Oh well....

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I know this thread is from '11 but I have the same problem with my 91, the alternator belt is worn and loose, but it runs fine

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2012-04-30 00:17:48

#27

lynchfourtwenty Online/offline status of lynchfourtwenty is unknown

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ok so?

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2012-04-30 00:25:11

#28

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.....? Just adding that it can also be the belt

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2012-04-30 00:42:42

#29

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Originally Posted by Nismo_sr20

just wanted to let y'all know that the problem was a faulty alternator. Even though it tested fine at the autoparts store, i replaced it anyways cuz i checked everything else. Anyways, after replacing it the problem went away. thanks advance auto for the crappy alternator and the crappy alternator test machine!

fail on their part

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2012-04-30 00:45:35

#30

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Weird, you'd think they would be more likely to say its bad so you spend money to get a new one, unless they make more money off batteries.

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