S14 Battery light

shiraazz · Post by **shiraazz** » Thu Jul 28, 2011 11:40 pm

Just came home now, and saw while i was idling my car the battery light on, when I rev, it gets dim.
Where do I start checking for the problem?

Thanks in advance

BigKriss · Post by **BigKriss** » Fri Jul 29, 2011 6:05 am

The diode pack has two or three diodes blown. Regulator will be un effected.
There are six on the plate, usually half of them -one phase-pops.

shiraazz · Post by **shiraazz** » Fri Jul 29, 2011 6:20 am

Will it be ok to drive before i fix it?

White Fang · Post by **White Fang** » Fri Jul 29, 2011 7:47 am

Fix it , ! or your car will use the battery while ideling !

And only run on alti when you revving it up , So if you idle long enough your battery will die !

shiraazz · Post by **shiraazz** » Fri Jul 29, 2011 8:06 am

I measured the battery this morning, was 14v while idling

White Fang · Post by **White Fang** » Fri Jul 29, 2011 3:29 pm

ok cool , then we can start with all the other small goodies , LOL

shiraazz · Post by **shiraazz** » Fri Jul 29, 2011 6:29 pm

Where are the diodes? i need to test them

shiraazz · Post by **shiraazz** » Sat Jul 30, 2011 8:14 am

anyone???

SilviaS13 · Post by **SilviaS13** » Sat Jul 30, 2011 9:05 am

Check on the alternator ?

BigKriss · Post by **BigKriss** » Sat Jul 30, 2011 1:47 pm

Shiraas , the voltage will be 14v even though the diode pack is fubarred.
Diode plate with the diodes attached are within the alternator housing.The plate makes up the rectifier pack for the alternator.
The reason the light starts glowing at low revs is the current demand from the cars electrics. You will find that by testing it on a test bench it will be way down on current supply (amps) when the demand hits.

POWDER · Post by **POWDER** » Sat Jul 30, 2011 4:02 pm

Shot for the info Barry, this might help m situation out too...... (Sorry for thread jack)

White Fang · Post by **White Fang** » Sat Jul 30, 2011 5:58 pm

Shiraaz made a turn at the shop today !
all the wiring on the car is loose and a couple of wires are open and loose !
so i told him to first sort out all the loose wires and tape up all the open wires and sloder them too ,

then we can look at altinator ! lol

*Nissan 200SX Club - South Africa