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  #1  
Old 01-30-2010, 06:43 PM
cdawall cdawall is offline
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Default is it something other than the alternator?

so i took my truck into this



got the truck stuck facing the other direction and had turned my engine bay mud colored the front went under for all of like 10 seconds but when it came back out my battery light came on. drove it for about 6hrs as tow truck and did some more light mudding thinking something had just gotten wet that shouldn't have and would dry out. about hour 6 the radio would cut out when i turned the lights on and when i drove it back on base it was on its last legs i parked it and after that it had to get jumped to crank. it would run pretty much indefinitely with the cables on and about 5 mins with them off but would sputter out and die after that didn't matter if it got some gas or anything else.

tried pulling the alternator off popping the back shell and cleaning it out. went thru a can of WD40 let it dry for a day and brought it into orielly they passed it on the alternator bench so i put it in the truck tightened everything up jumped it and it drove for about half an hour then sputtered and died in a parking lot. does anyone think its still the alternator and the voltage reg on it just went? is there anymore tests i can do? and i found a 95A at an online junkyard for $35+shipping so if it is dead ill snag that online....but if its not that what could it be?

oh and dumb question but when i pull the alternator back off i'm going to replace the squealing idler pulley. whats the best way to get the idler pulley tight against the belt cause i couldn't really get it tight enough by hand and the screw driver trick ain't happening
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Old 01-30-2010, 06:55 PM
STL STL is offline
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If orielly tested the alternator and it passed I would say it is defiantly not the alternator
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Old 01-30-2010, 07:04 PM
cdawall cdawall is offline
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Quote:
Originally Posted by STL View Post
If orielly tested the alternator and it passed I would say it is defiantly not the alternator
what else would cause the electrics in the truck to die then the motor shut off? basically when you un jump it or whatever the truck looses the dash gauge's radio etc. die then the truck sputters to death gas off or on the floor still no go on it
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Old 01-30-2010, 07:56 PM
Areyouforcereal? Areyouforcereal? is offline
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Try checking the voltage output while it is running. It should be anywhere between 12 and 14 volts at high idle.
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Old 01-30-2010, 08:04 PM
cdawall cdawall is offline
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Quote:
Originally Posted by Areyouforcereal? View Post
Try checking the voltage output while it is running. It should be anywhere between 12 and 14 volts at high idle.
i got told an easy way to check alternator was to pull the neg side of the battery while it was running and if the alt is bad it would die like instantly
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Old 01-30-2010, 08:47 PM
Areyouforcereal? Areyouforcereal? is offline
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I think that trick only works on older cars, and diesels. Pretty sure on modern engines you need to have the batt. conected at all times. Not positive though, I've only done it on an old case tractor.
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Old 01-30-2010, 08:55 PM
cdawall cdawall is offline
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what i got told was if it dont die right away it needs to get shut off but if the alternator is dead its going to just die
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