Topic: 136a alt upgrade question

[sharpxmen]

read the codes, put key contact on 3 times in a row and leave it on the last time, if you have a digital display odo will show the codes on it, if you dont the CEL will blink the codes with a pause between them (check faq for a more detailed explanation)

[tbirde7]

Well alternator tested fine checked all connections for a 3rd time, checked for voltage at field wires when running both show zero, so somehow regulator got messed up guy at local rebuild shop said I can wire external regulator from early Chrysler but most likely throw a code told me to try it and he would check to see if there is a work around if it does throw a code on way to O'reillys to get parts $25 investment to save $400 hope it works.

Sharp will follow procedures for checking codes if it does throw one I also have a scan tool.

Thanks
Mike

[sharpxmen]

i guess the question is why would this alternator bust the regulator in the PCM 

[Jeffy]

i guess the question is why would this alternator bust the regulator in the PCM 

Is that rhetorical? 

[sharpxmen]

Is that rhetorical? 

no, i'm really wondering, i can't see why that happened - i run the same alternator (without the AB suffix) and didn't have any issues, so just makes me think there's something wrong with the one he has (shorted maybe, don't know).

[Jeffy]

no, i'm really wondering, i can't see why that happened - i run the same alternator (without the AB suffix) and didn't have any issues, so just makes me think there's something wrong with the one he has (shorted maybe, don't know).

I thought you're using the alternator that's 100% bolt-on?

[sharpxmen]

I thought you're using the alternator that's 100% bolt-on?

yes, it is out of a GC, same p/n but w/o the AB at the end, didn't need to make any mods to it other than the usual plastic thingy to rotate at the output

[Jeffy]

yes, it is out of a GC, same p/n but w/o the AB at the end, didn't need to make any mods to it other than the usual plastic thingy to rotate at the output

That's what I figured.  The pigtails sounds a bit sketchy.

[tbirde7]

Well more bad news, went and bought external regulator and connector guy at local rebuild shop tested both old alternator and one with pigtail adapter both tested good.  Even said pigtail connections were correct.  Went to pick-n-pull got right 136a alt out of dodge Dakota went and had it tested to just to eliminate pigtail connector thing.  Well made my harness for external regulator found my 12v ignition source and wired it up started jeep checked for voltage and Zip, notta, nothing, still running off battery then jeep starts running like crap, spitting and sputtering, AC coming on and controls turned off, starts idling high then cuts off.  So at this point say heck with it all and call stealership and guy says $600 just for PCM, that wasn't happening.  Guy told me to check PCM connection as I told him whole story that jeep was running fine until I washed it. So disconnected battery and unplug each one 2 out of 3 rubber seals were ripped and it smelt burnt.  Jumped on google found site ordered and suppose to have reman'd PCM flashed and ready to go by COB Friday.  $235 total so really hoping that this does the trick.
Man I hope nothing else goes wrong.

Thanks for all the info

Mike

[sharpxmen]

if you had an external regulator the PCM was out of the loop, so in that case should have charged regardless - i'm wondering if you have a wiring issue of some sort?

[tbirde7]

I thought the same thing.  I have many folks scratching their heads over this had 3 people at one time on the jeep poking and scrambling around wiring and what not.  Dunno; anyway good news, PCM showed up and installed, jeep running right now, it's alive hoping it stays that way.  Taking the pigtail alternator back to pic-n-pull as my core.  Still scrambling my brain over this one, friend thinks the external regulator was bad off shelf.  Dunno, know its possible, but doesn't matter.  Wasn't really happy with the thought of having the external regulator on there anyway.  Getting ready to go for a test drive hopefully its good to go.

Got PCM from Auto Computer ECM out of Tilden, IL.  888-587-3019

$220 free shipping extra $15 for overnight. $235 total.

Appreciate all the advice

Mike