I have a doge van 1998 how do you get the old alt...

NOT THE VAN but PEEEKUPs
and old car and old alernators and gee old cars have wrong parts here seen it vast times, and know why it fails all ways it can.

13.4 to 15vdc running above 800 or at RPM is normal not less.
there 3 kinds of ALT for 25 years.
1 wire (means reg is in the ALT )
external reg type and last (old old old)
and ECU has the regulator. modern cars most are this.
i will now read your service many too , chapter.

question1:
does the dash have the Idiotttt lap called charge
and if burned out many cars then ,made the boot trap current dead in the alternator making the alternator regulator inside dead.
born dead, unit lamp fixed or forced to excite as you just did.
that is correct removing alternator in any car with main battery connected does in fact blow up the 2 huge fuses, in bay or the fuselink, saving harness fire. alt to main harness. large wire.

i can not find an accurate schematic for this alt.

but buying shows is external reglator, only at delco
the alt rear has 2 lugs (+ out) field + and field -) and must not be reversed, and may need polarizing and not down backwards.

how hint #1 seen on the web (I have no PCM schematic sorry)


The alternator on your Dodge Ram pick-up (except diesel) is computer controlled. To be a bit more specific, the alternator's voltage regulator is located inside the PCM.
Besides the voltage regulator, the PCM also uses a Battery Temperature Sensor (BTS) to control the alternator and this bad boy (the BTS) is also part of the internal circuitry of the PCM. In other words, this sensor is also part of the PCM. Its job is to sense battery temperature so that the PCM can adjust the alternator's charging rate.
oops found this, 5 things to fail includes PCM
2 fuses, and ASD relay and ALT,.
this what modern cars do now. and makes the battery last longer with way smarter PCM controls.

ran cheery, the exhaust ran red hot? LOL.
the engine runs off the alternator not the battery.
so , if the alt is bad,the battery will discharge.
the alt charge lamp glows, did it?

old post,
bad alt, or battery is no good.
try a known good battery , and make sure the
voltage across the battery is 13.3v to 15vdc running.
if not the ALT System is bad, notice I said system.

btw , replaced means nothing to me.
new , used, rebuilt, recycled, , what?

Are you saying it does not crank, or does not start ?
Does the battery cable on the alternator post show 12 volts ?

Good alternator should charge 14.5+V.How old is battery,older getting weaker.

it wouldnt burn alt it would burn up batt. need to make sure you have good conection " tightn every connection tight" and check your grounds "neg wire to dround" and connection on starter

There is a fuse or fuseable link between the alt and battery, and the alt gets a signal from the key to activate the voltage regulator.
I would check for batt voltage at the alternator and you may need a wiring diagram to check for key voltage.

first of all, check voltage from alternator. at battery when running, should be at least 13.6-14.2 volts. with every thing off. if lower than 13.6 volts at battery. then alt, is bad. if alt, is ok ! then its the battery. or the battery connections are all corroded at battery post. good-day! make sure the grounds are ok to battery.

OK IF VAN TURNS OVER FINE BUT NO STAR ,ALL ITEMS MENTIONED ARE OK.MORE THAN LIKELY CRANK SENSOR OR NO FUEL.IF VAN NO TURN OVER AT ALL , BAD STARTER OR LOW BATTERY ,LESS THAN 12.5 VOLTS WITH VAN RUNNING MEANS BAD ALT.

losen the bolts on the alt in use a bar or sumthing strong enuf to take the force to pry it up while the belt is on that should work

Rest at ease the 14 volts will not hurt your system idealy your alt will charge at around 14 to 14,5 volts at the alternator and probably have a slightly lower charge rate at your battery at around 14 to 13.5 at the battery this is completely normal