ive posted on this before with batt light topics.
i just lost my hf alt on the way to work. light flikered and then poof.

is somting grounding out and frying them?

 

possibly. check ALL the wiring you can find. especially ground cables and the battery/alt area. How many alts have you fried? all new? all used? could just be coincidence.

 

both used. all cables secure in alt abt area. coincidence i think is waht im puting my money on.

 

if there used that could be the problem i would bet on it. it doesnt hurt to clean yer grounds op when you check them also

 

stereo equipment in the car? alot of aftermarket electronics? those can kill a used alt quick.

 

is it the bearing tha t are failing or the windings.

 

check for a voltage drop between the alternator and the battery... if there is resistance in the wiring it will put an excessive load on the alternator at all times

 

its been acouple of days now and it is completely random now. on the way home i could (at first) pop the light OFF with a good hit on the brakes. checked all the cables plugs grounds (added ones as well). NO drop in voltage even with the bat light on

DAY OF FIRST POST:

when i got back to the shop to fire it up the light was not on. (batt). i pulled it in the shop and turned it off. fired it up no light. turned it off. boss poped the hood started it up and no light with a constant 14 v at the alt. turned it off. when checking tension on the belt the the ghetto black tape rigged air temp sensor came unpluged and at fire up, to pull out, came a check engine light soon folowing a batt light.
i turned it off. on , still on

90 dpfi to zc mpfi with heat shrinked solderded taped and tubed connections. it cant be water but it has been very wet out lately and thats when it **** up

not altennator


pissin me off

 

is your alt mount bent? does the belt ride smooth across the pully?

 

all new brackets and bolts. old crappy belt though im gonna replace it today