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04-07-2007, 04:45 PM
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#1 | |
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Registered User
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Charging system
My battery went dead without any warning. I jump started the jeep and checked the voltage at the battery terminols. The needle in the volt meter kept going up and down and the battery didn't take a charge from the alternator is this the alternator or the voltage regulator? And where would the voltage regulator be located since it's not on the alternator? THANKS FOR ANY HELP ON THIS MATTER
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04-07-2007, 05:02 PM
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#2 |
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Registered User
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The voltage reg. is in the computer. First thing I would do is check your grounds and possibly a short. The batt should not just die unless something is left on or there is a short
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04-07-2007, 05:34 PM
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#3 |
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BUILT. NOT BOUGHT.
 
1989 YJ Wrangler
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it's going up and down at idle? it may fluctuate just slightly, but it shouldn't change much. what voltages are you fluctuating between? it sounds like a bad alternator either way. i'd take it off and have it tested at your local auto parts store.
if your voltage was merely low and it appeared as though the alternator was toast i'd suggest checking fusible links or fuses first but that's not the case here....
__________________
'89 Wrangler, 4.0/AW4, 106" Wheelbase, SOA, custom XJ packs, 2" Body. Front High Pinion Dana 44 w/yukon super-joints, chromo inners and outers, and a Lincoln Locker. Rear Dana 60 w/Yukon 1.5" 35 Spline chomo shafts and detroit locker. 5.38 Yukon Gears. Hydro-Assist, 39.5x18" Boggers on 15x12 RockKrawler's w/ 2.75" of backspacing. Comp cut, tube fenders, custom bumpers and rock sliders, fuel cell, CB, Stewart Warner Gauges, SmittyBilt XRC8 Winch, 140 Amp CS-144 Alternator, Electric Fan, and a cooler of beer. 3897 lbs March 1st, 8pm. WILMINGTON, NC MEET & GREET @ HOOTERS! |
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04-07-2007, 08:26 PM
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#4 |
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Registered User
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IT was going up and down at idle but now it's staying at only 10.5
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04-07-2007, 08:39 PM
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#5 |
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BUILT. NOT BOUGHT.
1989 YJ Wrangler
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get that alternator tested.
your battery is almost dead 
__________________
'89 Wrangler, 4.0/AW4, 106" Wheelbase, SOA, custom XJ packs, 2" Body. Front High Pinion Dana 44 w/yukon super-joints, chromo inners and outers, and a Lincoln Locker. Rear Dana 60 w/Yukon 1.5" 35 Spline chomo shafts and detroit locker. 5.38 Yukon Gears. Hydro-Assist, 39.5x18" Boggers on 15x12 RockKrawler's w/ 2.75" of backspacing. Comp cut, tube fenders, custom bumpers and rock sliders, fuel cell, CB, Stewart Warner Gauges, SmittyBilt XRC8 Winch, 140 Amp CS-144 Alternator, Electric Fan, and a cooler of beer. 3897 lbs March 1st, 8pm. WILMINGTON, NC MEET & GREET @ HOOTERS! |
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04-07-2007, 09:25 PM
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#6 | |
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Web Wheeler
 
1995 YJ Wrangler
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Quote:
I believe you VR is inside the alternator. You could have bad cables/connections, but for now assume they are OK. Most people never consider them when inspecting the charging system. With a volt meter test the output voltage of you alternator. Or, If you are coming out in the morning and your battery is dead but after you jump it and drive it a bit it seems to be OK until the next AM when it is dead again you have a drain or you got a bad battery. It won't hold a charge. If your alternator is NG to 'test' it; At night start up your heep put on your lights at hot idle. Note how bright they are. Now bring up your RPMS a bit if they go real bright your altenator could be bad. Remember bad battery cables/connections can cause the same symptoms. |
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