BATTERY light keeps popping on HELP!
#1
Senior Member
Thread Starter
BATTERY light keeps popping on HELP!
Hey guys,
So today my battery light popped on a couple times. took it to Oreillys auto and both battery and alternator checked out good. I am thinking this could be a Belt tensioner going out causing the belt to slip and alternator not charging properly.... The red battery light only pops on after I "get on the gas" and only stays on for about 45 seconds.... I am sitting on 120k on the original belt and tensioner, is anyone in agreement with my diagnosis or have any other ideas?
So today my battery light popped on a couple times. took it to Oreillys auto and both battery and alternator checked out good. I am thinking this could be a Belt tensioner going out causing the belt to slip and alternator not charging properly.... The red battery light only pops on after I "get on the gas" and only stays on for about 45 seconds.... I am sitting on 120k on the original belt and tensioner, is anyone in agreement with my diagnosis or have any other ideas?
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BIGDAWG78 (10-06-2015)
#3
Senior Member
Thread Starter
i also hear a slight when when on wide open throttle... I am assuming thats the tensioner puller and\or the idler pulley
#5
Mark
iTrader: (1)
I’m thinking alt...
#6
Senior Member
I'm with techrep, alt or battery, but would start with replacing the belt and checking all pulleys. They do have 120k miles on them, so it's probably time for something to go. Keep in mind the tests O'Reilly's can do are not always definitive.
#7
Moderator (Ret.)
There's a bridge diode assembly in the alternator that may be failing intermittently. This diode assembly converts AC to DC.
At 120K, your belt and tensioner are very overdue for replacement, so tossing that in as fix would not hurt your wallet if it does not cure your current charging issue.
At 120K, your belt and tensioner are very overdue for replacement, so tossing that in as fix would not hurt your wallet if it does not cure your current charging issue.
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#8
Mark
iTrader: (1)
and when replacing the Alt... use Motorcraft only
#9
Senior Member
Thread Starter
so I changed both idler pulleys, belt tensioner and serpentine belt..... I drove it about 10 miles from home and BOOM!!!! the dang battery light popped back on... ****!!!!