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Old 10-21-2002, 21:33   #1 (permalink)
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Charge light on?

Guys ive had this problem for awhile but now it appears worse.
Ive been noticing that the Charge light on the dash was slightly illuminated when the IGN was off. Now it seems that its getting brighter and is almost fully on when the engine is off. Its been coming on sometimes when driving and sort of pulsing a little. Its not real bright like when yer alt belt is off tho. Is this a sign of early regulator failure?

Brent
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Old 10-21-2002, 22:44   #2 (permalink)
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Id be checking the tension of the belt, and the condition of the battery terminals first....
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Old 10-22-2002, 00:42   #3 (permalink)
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Check the diodes in the alternator.
Turn ign off. Remove the 2 pin connector .
Measure the voltage at the wiring harness L terminal (the one closer to the 3 oclock position) It should be 0V. If it's not, check the wiring. If it is 0V, the problem could be in the instrument cluster.
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Old 10-22-2002, 03:48   #4 (permalink)
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I dont have 0V at either terminal... 12V at one and 2.5V at the other. This is the small 2 pin connector terminal...

Brent
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89 EA1 3.9L TBI Falcon Sedan with 3 speed auto / currently being upgraded...
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Old 10-22-2002, 12:13   #5 (permalink)
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Yea, the L terminal should be OV not 2.5, so you have a fault in the wiring circuit. I haven't got any wiring diagrams, so that's the best I can do. Also check the fuse for a loose contact and the integrity of the battery connections and connections to the alternator. With the motor running, check the voltage at the battery, should be about 14V, turn all lights and a/c on and check again, if it drops to around 12V, your alternator is not charging properly.

best of luck, let us know what happens.

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Old 10-22-2002, 19:19   #6 (permalink)
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Thanx TopGhia.... I couldnt find any wiring faults so i went down to the wreckers and got a replacement alternator. The charge light doesnt come on anymore and im getting about 13.4V at the batt terminals.... it increases to about 13.6V if i rev up the engine... Before i was getting about 12.4V so i hope this fixes the problem. Ive also tightened up the batt terminals.

Brent
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Old 10-22-2002, 22:41   #7 (permalink)
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Thanks for letting us know.

Cheers
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