Alterantor question

[truckdude239]

On my 2002 Suburban the alternator went out today and it's the 130bosch unit I got a replacement from the auto parts store installed it and it charges butt occasionally it randomly drops charge. After 2 hours of searching nobody had another one and I had to order another one to come in in the morning just swap it out. My question is has anybody ever used the Delco unit as a direct replacement for the bosch unit. The plugs are the same just in a different spot. Will the computer control a delco unit if it had a bosch unit? Everyone has delcos unit but not the bosch ones.

So wi they inter change?

[izzy_Britton]

i am not able to help you with this question, but this brings up another question.

if the alternator is listed as a direct replacement shouldnt it work out of the box?

and...

if your using a stand alone harness such as a 3 or 4 wire, shouldnt any ole alternator that fits work?

Izzy

[truckdude239]

This one isnt a swap its on my 02 suburban they had 2 different styles of alternator i have the bosch style thats. Not very common wondering if tbe delco style will plug in and still charge or not

[clinebarger]

Originally Posted by truckdude239

This one isnt a swap its on my 02 suburban they had 2 different styles of alternator i have the bosch style thats. Not very common wondering if tbe delco style will plug in and still charge or not

According to my diagrams, They both use the same Regulator Connector & are wired the same.

[truckdude239]

Thanks clinebarger i installed 2 remans today from advance auto they where both jokes smell ed so bad and got so hot you couldnt touch them. Got a napa unith coming tomorrow

[BigDan3131]

Do not buy remanufactured anything like starters or alternators, just because they have a lifetime warranty. I work for O'Reilly's and 7 out of ten come back in less than three months or less because their junk. Unless of course you like trying to see how fast you can swap them out lol.

[truckdude239]

Dan i normally dont but noone arround my carrys the 130 bosch unit new thats on there.

[BigDan3131]

Have you asked at the O'Reilly's? They should be able to get it from Keystone which is our other parts supplier or from out of the district. Have you tried Rock-Auto yet either?

[truckdude239]

Im to the poi t now that i dont know if it is the alternator ive got the napa one on there and it will charge at 14.2 volts then with nothing on drop to 13.6 then jump back to 14.2 turn the ac on it will drop to 12.6 or lower which mean no charge one point stayed that way for 45 seconds before jumping back to 14.2, if i increase the rpms by 200 rpms it will not drop which makes me thing alternator.my frist one did this, second and third smelled really bad. Im at my wits end with this .

I do have a snap on Solus Ultra scaner wonding if theres a way to montior pcm request for charge and back prope the plug and see if it has a charge singal at the alt when it drops voltage

[truckdude239]

BTW electrical in not my strongest subject

[clinebarger]

If the alternators are getting hot, Suspect.....

1. Battery has a dead cell, Charge the battery with a charger, Remove the charger & monitor the voltage with a meter, A fully charged battery will have at least 12.6 volts, (a surface charge of 12.6-13 volts will linger for a while on a good battery) If it drops below 12 volts.....The battery is bad & is overworking the hell out the alternator.

2. Bad Connections, Disassemble both battery cable terminals & clean them, Remove the Nut, Then the Rubber end will slide off the Cable, Clean the Nuts & Cable ends & reassemble. A Radiator Hose Pick is the perfect tool for this.

[truckdude239]

Will do battery is an autocraft agm 78 series it checked good 945 of 850cc was 12.6 volts when i had it checked battery was replaced in December so its roughly 6 months old the 2nd and 3rd alts got hot and smelled bad within 2 mins of installing them i did have 12.6 at the rear post of alt , i have been having some weird stuff going on i replaced intake gaskets knocks and harness in feb last month light comes on for knocks po332 clear it check couple das later code is pending get back from 100 mile trip code is gone no pendings, 2 weeks ago light is on for p0332 again and a p0430, i replaced tbe knocks again with dephi, cat code hasnt been back then after 1st alt engine comes on for temp sensor circuit and of corse temp gauge wasnt working get in truck next morning lights gone and guage is worki g again. So some tell me i might have a pcm problem

[clinebarger]

Well, The Temp Sensor, & Regulator control wires are next to each other in some parts of the harness, Have you checked for rodent damage, Bare spots in the harness with no loom rubbing on metal components, Or previous wiring repair?

Not very often a "P01" PCM goes bad, Probably the last thing I would suspect. This is my general rule on most vehicles.....Besides Chrysler products....They have know PCM (Solder Joint) issues.

[truckdude239]

i did check the harness and did not see anything that stood out, i had anotehr shop down the street from mine look at it and they seem to think its the alternator because if you incread the idle speed by 200 rpms the problem goes away but at teh 550 idle it will randomly drop chrage. i ordered an ac delo reman from a local vendor for $195.00 it should be here thursday or friday and i'll have to see if thats the cure or not. i am so done with these mass reman alts

[truckdude239]

also i've been told its normal for voltage to not be steady at idle but my orginal never droped below 14 volts

[truckdude239]

I give up on this truck, was chraging when when i took it home i went out when i got home started it up no charge at all the all the lights fliickered and radio reset it self while running, has 12 volt at back of the alt but no charge im done taking it to the other shop i use ,

[truckdude239]

Welp other shop called me today turns out the ac delco was bad also push on the back of the case where voltage reg was and it would start charging, going tk install the normal delco style alternator since according to the ac delco Bulletin that the bosch Style and Delco Style are interchangeable and the delco style is easlier to get my hands on so this will make alternator #6

[truckdude239]

So alt #7 fixed it I installed a reman delco style and its was charging 13.6 noticed the fuseble link was really hot after 2 mins run so i took it out for a short battery cable untill gm gets me a new fuseble link to put back in after i installed cable i gave 14.2 volts steady at idle with ac on high

[ls1nova71]

I would want to know why the fusable link was getting hot in the first place, removing it and replacing it with a cable is like taking a blown fuse out and putting a paper clip in its place, or putting a penny in an old house fuse box that takes the old screw in glass fuses, its a fire waiting to happen. .......

[truckdude239]

Im guessing it bad i tried ohming it out with my meter but it had a very high ohm reading i have another on order from gm but going to be a few days

[truckdude239]

I installed a new fuseble link from gm this one does not get hot and is still charging 14.2 with ac and headlights on