charging problems.

[Outlaw]

hello,
blazer with 500 is running,
but wont charge,
tested battery, ok
replaced alt.
i put a new 2 prong plug on the alt,
of the 2 wires, which one goes to the main wire on the alt,
their is a red an a white.
on the old alt i used the white, but the alt started smoking.
so on this one i used the red,
but when i pull the battery cable off the battery, it stalls out.
please HELP,

 

[ixfn]

On the plug, just run the red directly to the charging post and omit the white wire.  I've done a number of rigs that way and just ran a decent gauge lead from the charging post directly to the battery :twocents:

 

[Outlaw]

yup, thats what i did,
i did some research on the net,
i read that a high output alt, will not charge at low rpm,
so im going to check that tomorrow,
i hope i figure it out,  i need to make 4 trips to Tn,
600 mi each way. pulling a trailer 6000lbs

 

[shiftless]

Is it an internal or externally regulated alternator? If external, you need a wire from alt output to battery, another wire from alt field to field on voltage reg, then on the reg you need a wire from A terminal to battery positive, then from S terminal to ignition switch.

 

[Outlaw]

HELLO,
ran a wire from alt to battery,
still 8 amps when i start it up,
rev the engine up a little.
boom,  went right to 13 amps,
so it did need the wire an does not charge at idle.
so far working great.
oh yea, forgot, its an internal,
thank you,
Ox