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Discussion Starter #1
Driving home from the mountains today my e-brake light and battery light were randomly coming off and on. When they would come on, my headlights and instrument lighting would get noticably brighter, then they would dim back to normal when the lights went off. It has never done this before. About a week ago I had a problem with it starting once in a while but cleaned the battery posts and that seemed to take care of that....dont know if its related or not. The battery is only about 6 months old so Im pretty sure it's not that. If any of you guys have any ideas please let me know. Thanks! Oh yeah, its an 89 standard cab toy truck.
 

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Discussion Starter #3
Anyone else?? I just want to be sure before I go buy a new alternator. <IMG SRC="smilies/pissed.gif" border="0">
 

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I'm quite sure that's what it is... But you can have the parts store check it first...

The same thing happened to both of my Carollas, and when I replaced it on my truck it only flickered the "check engine" light once or twice....then nothing.

I think there is a way of testing it at home by starting the truck, then while running, disconnect the battery. See if it still stays runnning.... Not positive on that...thou

[ 09-09-2001: Message edited by: 89YotaRunner ]
 

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I'd have to agree - altinator. Sounds like the voltage regulator is about to die. I'd swap that quick before you start blowing fusable links...
 

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First, check:
1) alternator bet is tightened to specs
2) alternator bracket and bolts are all ok
3) alternator pulley/belt is not worn out of specs (belt should not bottom in the groove in the pulley)

The same thing happened to me twice awhile back, 1st time it was the lower alternator (pivot?) bolt had gone astray. The second time turned out the alternator mounting bracket broke through under the adjustment tightening bolt and the alternator would relax adjustment under load (this one was real tough to figure out since the crack was hidden under the tightening bolt washer.

4) Lastly, I'd at least take a look at the alternator brushes before you do something major as they are not expensive notr all that hard to replace.
 

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take it to checker or cragen depending where you live they will test it for free!
 

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Discussion Starter #9
Welp, Rockota got it right. Took it and had it tested today...the regulator is going out. Just picked up a whole new alternator on the way home from work....off to the garage to put it in <IMG SRC="smilies/rolleyes.gif" border="0">
 
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